Polarized Positrons at SLAC

Mailing Lists, Milestones, Data, Safety

Meeting Minutes .

Internal Notes .(see separate page)

Note that the contents of this page, and the materials it points to, represent opinions, conjecture, wild guesses,....
but not necessarily any final conclusions. Consult with the author(s) before quoting anything from this page.

Mailing Lists, Milestones, Data, Safety

Our Electronic Logbook at SLAC (now functional!)
Our Electronic Logbook at UTK (Collaborators only, password required)
Our internal general E-166 mailing list, e166-l, Archives, and General Info . Note: to [un]subscribe, send email to majordomo@SLAC.Stanford.EDU with text [un]subscribe e166-l . Only list members can post (and subscriptions must be approved). Also: Don't send attachments; rather put attachments on web site, and refer to the web site in your posting.
Our internal mailing list for E-166 Operations, e166ops-l, Archives, and General Info . This list is for E-166 operational issues, such as FFTB accesses, detector installation, data acquisition issues, data taking, shifts. (So at times there might be numerous messages including much detail). Note: to [un]subscribe, send email to majordomo@SLAC.Stanford.EDU with text [un]subscribe e166ops-l . Only list members can post (and subscriptions must be approved).
Our new set of Milestones [PDF], established by John Sheppard on March 23, 2004. (The previous set, by Jym Clendenin, has apparently disappeared. )
The October 2003 Collaboration Meeting Talks Page
(Some unreconstructed and totally unreliable) Data, as taken from existing detectors, can be found at /afs/slac.stanford.edu/g/e166/data . All e-166 collaborators should have read access.

Paper logbook of June 2005 run [directory of 16 PDF files (~178 MB total)].
Safety Requirements: Carsten Hast's useful Instructions for Research Yard Users of FFTB,.. Read all and fill out the appropriate Office/Shifter/Experiment JHAMs and have them signed!
See also AHA for Bldgs. 406, 407: PDF and for FFTB: PDF.
Newest Version of Telephone List [ html | doc | sxw }

News, Minutes or Notes for Meetings

Latest on top. Note Disclaimer above.

For easy reference: e166-l archive for November, 2009 (there were no e166-l messages in October)
For easy reference: e166-l archive for September, 2009 (there were no e166-l messages in August)
For easy reference: e166-l archive for July, 2009
For easy reference: e166-l archive for June, 2009
For easy reference: e166-l archive for May, 2009
For easy reference: e166-l archive for April, 2009
For easy reference: e166-l archive for March, 2009
For easy reference: e166-l archive for February, 2009
For easy reference: e166-l archive for January, 2009
Happy New Year!
For easy reference: e166-l archive for December, 2008
For easy reference: e166-l archive for November, 2008
For easy reference: e166-l archive for October, 2008
For easy reference: e166-l archive for September, 2008
For easy reference: e166-l archive for August, 2008
For easy reference: e166-l archive for July, 2008
For easy reference: e166-l archive for June, 2008
For easy reference: e166-l archive for May, 2008
For easy reference: e166-l archive for April, 2008
For easy reference: e166-l archive for March, 2008
For easy reference: e166-l archive for February, 2008
For easy reference: e166-l archive for January, 2008
Happy Holidays and a happy New Year!
From Ralph Dollan: Message and Figures of December 20 and 21, 2007
For easy reference: e166-l archive for December, 2007
For easy reference: e166-l archive for November, 2007
For easy reference: e166-l archive for October, 2007
There is (was) an ILC Positron Source Collaboration Meeting, September 17 - 19, 2007 at Argonne National Laboratory ( Agenda with links to talks).
For easy reference: e166-l archive for September, 2007
For easy reference: e166-l archive for August, 2007
For easy reference e166-l archive for July, 2007
For easy reference: e166-l archive for June, 2007
For easy reference: e166-l archive for May, 2007
For easy reference: e166-l archive for April, 2007
For easy reference: e166-l archive for March, 2007
For easy reference: e166-l archive for February, 2007
For easy reference: e166-l archive for January, 2007
Happy Holidays and a happy New Year!
For easy reference: e166-l archive for December, 2006
For easy reference: e166-l archive for November, 2006
For easy reference: e166-l archive for October, 2006
For easy reference: e166-l archive for September, 2006
For easy reference: e166-l archive for August, 2006
For easy reference: e166-l archive for July, 2006
(20-Jun-2006) From Karim Laihem: The E166 Spectrometer - Positron tracks visualization under MERMAID field map using Wired3 Web page with animations
For easy reference: e166-l archive for June, 2006 Look here for meeting announcements and discussion of the analysis.
The E-166 Collaboration Meeting in Princeton May 22-23 , 2006 is now under way. See the mailing list for links to some presentations.
From Gideon Alexander and Erez Reinherz-Aronis:
Positron asymmetry and polarisation extracted from the E166 September 2005 run, memo of 19-Dec-2005 [PDF, 10p 898 kB ]
and addendum of 21-Feb-2006, A more bounded Delta(Asymmetry) option, [PS, 2 pp 198kB]
For easy reference: e166-l archive for May, 2006 Look here for meeting announcements and discussion of the analysis.
For easy reference: e166-l archive for April, 2006 Look here for meeting announcements
(e.g.for the E-166 Collaboration Meeting in Princeton May 22-23 , 2006 )and discussion of the analysis.
Karim Laihem gave a review of E-166 at the Linear Collider Workshop LCWS 06, in Bangalore, India
{ LCWS06 Website India | LCWS06 at CERN/Indico | Indico Contributions List ]
His talk can be found here: [ [pdf, 12p, (2slides/page) 2.4MB | ppt, 23 slides, 7.75MB]
For easy reference: e166-l archive for March, 2006 Look here for meeting announcements and discussion of the analysis.
(28-Feb-2006) Analysis of Positron Asymmetries using September Data, by R. Dollan, H. Kolanoski, T. Lohse, K. Laihem, S. Riemann, A. Schaelicke [PS, 42 pp 2.9MB].
(28-Feb-2006) From Karim Laihem: Geant 4 Simulation Results on Positron Kinematics in E166 Experiment (Web page))
(also PDF Memo, 21 pp. 663 kB; and Announcement-Explanation of dynamic Web page use)
It summarizes his study with some dynamic scans of the lens for different spectrometer current The figures show the focusing effects, spatial and energy distribution at three points (A, B and C) of the e+ transportation system. . (A: At the entrance of spectrometer, B: At the exit of spectrometer , C: At the reconversion target)
For easy reference: e166-l archive for February, 2006 Look here for future meeting announcements! (I won't post them here any more)
The next weekly meeting of 2006 is Wednesday, February 1, 2006 at 9:00 a.m. PST.
The call-in number is, as before, 510-665-5437, the meeting number 0211 as before.
At SLAC, it is in the ESA Counting House. Announcement
For easy reference: e166-l archive for January, 2006
The 4th weekly meeting of 2006 was Wednesday, January 25, 2006 at 9:00 a.m. PST. Announcement Agenda: Discussion of what is requred for publication.
The 3rd weekly meeting of 2006 was Wednesday, January 18, 2006 at 9:00 a.m. PST. Announcement
The 2nd weekly meeting of 2006 is Wednesday, January 11, 2006 at 9:00 a.m. PST. Announcement
Happy New Year! The first weekly meeting of 2006 is Wednesday, January 4, 2006 at 9:00 a.m. PST.
Announcement
Happy Holidays to all! And a happy, healthy and successful New Year! (SLAC is closed until Jan.3, 2006.)
For easy reference: e166-l archive for December, 2005 and e166ops-l archive for December, 2005
Weekly meeting of Wednesday, December 21, 2005 at 9:00 a.m. PST.
The call-in number is, as before, 510-665-5437, the meeting number 0211 as before.
At SLAC, it is in the ESA Counting House. Announcement
Magnetic Measurement's Data repository of E-166 Spectrometer measurement data
(File extension .ruN refers to measurement run N; these files are ascii files).
Weekly meeting of Wednesday, December 14, 2005 at 9:00 a.m. PST. Announcement
From Alexander: Mermaid file for 150A spectrometer and 360 A lens ( FMATHM.DAT 7.4 MB, 100,000 lines)
Weekly meeting of Wednesday, December 7, 2005 at 9:00 a.m. PST. Announcement
Directory with three photos of the Gamma Table taken by Peter Schuler on 14-Sep-2005, and message.
Vacuum Chamber Drawing File [AutoCAD dwg, Message]
Weekly meeting of Wednesday, November 30, 2005 at 9:00 a.m. PST. Announcement
Weekly meeting of Wednesday, November 23, 2005 at 9:00 a.m. PST. Announcement
There is no weekly meeting on Wednesday, November 16, 2005 as said in this Announcement
There also was none the week before, due to the Zeuthen Collaboration Meeting Nov.7-9, 2005.
Weekly meeting of Wednesday, November 2, 2005 at 9:00 a.m. PST. Announcement
Next week's meeting will be the Zeuthen Collaboration Meeting Nov.7-9, 2005. ( Proposed Agenda)
Weekly meeting of Wednesday, October 26, 2005 at 9:00 a.m. PST. Announcement
Web Page for the Zeuthen Collaboration Meeting, Nov. 7-9 (Mon-Wdn), 2005.
Weekly meeting of Wednesday, October 19, 2005 at 9:00 a.m. PST. Announcement
(FFTB will be in open access until Nov 14.)
There will be a Collaboration Meeting in Zeuthen on Nov. 7-9 (Mon-Wdn), 2005 (see first Invitation)
For easy reference: e166-l archive for October, 2005 and e166ops-l archive for October, 2005
For easy reference: e166-l archive for September, 2005 and e166ops-l archive for September, 2005
Weekly meeting of Wednesday, September 21, 2005 at 9:00 a.m. PST. Announcement
Note also the daily operations meetings at 4 p.m., as announced in the e166ops-l mailing list.
Weekly meeting of Wednesday, September 14, 2005 at 9:00 a.m. PST. Announcement
There were/are also daily operations meetings at 4 p.m., as announced in the e166ops-l mailing list.
(09-Sep-2005) From Andreas Schaelicke, S. Riemann, H. Kolanoski: a summary note about the
June run data analysis of the positron asymmetry [ pdf 3.5 MB | ps.gz 168 kB; 13 pp]
(07-Sep-2005) From Bill Bugg, Shift Assignments for this week (through next Thursday): [ xls | htm ].
Weekly meeting of Wednesday, September 7, 2005 at 9:00 a.m. PST. Announcement
For reference: e166-l archive for August, 2005 and e166ops-l archive for August, 2005
(26-Aug-2005) From Bill Bugg: (and Peter Schuler and Vahagan ...) Discussion on Photon Asymmetry [E166-l messsage ] [ GCal Response, Figure in xls ]
(24-Aug-2005) Rick Iverson sent out a Draft FFTB Startup Checklist [pdf |html |doc ]
(Rick's Message: .... FFTB Startup Checklist for the E-166 experiment scheduled for Sep 6-Oct 3, 2005. Please let me know if there are any errors or omissions. Note that the magnet configs are for the 46.6Gev beam established during the last test, but this can be scaled to the actual energy the linac produces.)
I suspect that the weekly meetings of August 17 and 24 will be held at Snowmass. Of particular interest might be the Sources Working Group.
Here is a handy view of JCS's message of August 12 on the various field measurements. (and discussion prompting this)
(30 July 2005) Erez's spreadsheet summarizing all runs: (doesn't display well) htm
There were weekly meetings on July 27, August 3, and August 10. See the July and August e166-l mailing lists archives for announcements, and other info.
Weekly meeting of Wednesday, July 20, 2005 at 9:00 a.m. PST.
The call-in number is, as before, 510-665-5437, the meeting number 0211 as before.
At SLAC, it is in the ESA Counting House. Announcement
Weekly meeting of Wednesday, July 13, 2005 at 9:00 a.m. PST. Announcement
Agenda:
- See discussions contributions below
- Changes to System
- Run Plan for September
Please read and comment and add to the discussion contributions, comments on last run from:
- V. Bharadwaj, K. McDonald, J. Sheppard, D. Walz, E166-Equipment Discussion of July 8: [Web Page html | MS Word doc | OpenOffice sxw | PDF pdf ]
- Bill Bugg, July 6, 2005 Possible Improvements: [ html | rtf | sxw | pdf ]
- Karim Laihem, July 5, 2005 Summary of first run and small suggestions for September run: [pdf 4p.]
Weekly meeting of Wednesday, July 6, 2005 at 9:00 a.m. PST.
Announcement Agenda:
- Analysis Schedule
- Plans for September run: - Resources - What needs to be done differently?
For reference: e166-l archive for June, 2005 and e166ops-l archive for June, 2005
(30 June 2005) Our paper logbook has been scanned and can be found here(directory) as a collection of 16 PDF files (~178 MB total).
Weekly meeting of Wednesday, June 29, 2005 at 9:00 a.m. PST.
The call-in number is , as before, 510-665-5437, the meeting number 0211 as before.
At SLAC, it is in the ESA Counting House. Announcement Agenda:
- Beam time ends 08:00 PDT Wdn 29-June-2005, next run September 2005.
- Data analysis status
- Publication plans? (Tech.Note/Journal/Snowmass talk)
- Plans for September.
E166 is mentioned in the June 17 issue of SLAC's Newsletter, Interaction Point, in an article entitled E-166: The Sultans of Spin. (Who came up with this title? Does it have unintended meanings?)
(17-June-2005) First evidence of Undulator-generated photons: Screen shot of DAQ display (lower left shows photon counters with undulator on/off); Announcement
From Bill Bugg:
Shift Plan of June 15: Excel html
Update and some open shifts, June 20: Message Excel html
Weekly meeting of Wednesday, June 15, 2005 at 9:00 a.m. PST. Announcement
Weekly meeting of Wednesday, June 8, 2005 at 9:00 a.m. PST. Announcement
Photos taken on June 2, 2005 by Achim [ index ]. and on June 5, 2005 by Kirk [ directory ]
(01-Jun-2005) For the afternoon meeting:
- Past Weekend Goals/Activities: doc html
- Checkout List doc html
- Beamline Schematic Picture jpg
- Gamma Line Schematic Picture jpg
Weekly meeting of Wednesday, June 1, 2005 at 9:00 a.m. PST. Announcement
The memo of October 2004 John Sheppard referred to in this Message is here [doc | html ]
Weekly meeting of Wednesday, May 25, 2005 at 9:00 a.m. PST. Announcement
Now that the power outage ( Bill Bugg's report on it, TIP Director's Memo) is over, we'll have again
a daily operations meeting at 4:00 p.m. in the ESA Counting House.( Announcement, May 2005 E166ops-l archive)
Weekly meeting of Wednesday, May 18, 2005 at 9:00 a.m. PST.
The call-in number is , as before, 510-665-5437, the meeting number 0211 as before.
At SLAC, it is in the ESA Counting House. Announcement
Weekly meeting of Wednesday, May 11, 2005 at 9:00 a.m. PST. Announcement
Agenda:
- Hast: Tunnel Status/Activities
- McDonald: SLAC Visit
- Bharadwaj&Sheppard: Schedule Discussion/Update
- Walz/Sheppard: Undulator/Collimator Status
- All: AOB
Also: Bill Bugg's proposed Ntuple format Message Excel Spreadsheet [ xls 28kB]
(04-May-2005) From Carsten Hast: Important information on Safety requirements: Message and useful Instructions for Research Yard Users of FFTB,.. Read all and fill out the appropriate Office / Shifter / Experiment JHAMs and have them signed! See also AHA for Bldgs. 406, 407: PDF and for FFTB: PDF.
Weekly meeting of Wednesday, May 4, 2005 at 9:00 a.m. PST. Announcement
Agenda:
- McDonald: Undulator/Collimator Status
- Bharadwaj: Update to E166 User Training Requirements/Work at SLAC/Arranging a Trip to SLAC powerpoint
- Sheppard: Safety Discussions
- Berridge: SLAC Trip
- Bugg/Szalata: MCCDAQ List (See item below)
- Sheppard: What does everyone think of a June 1 Start? Schedule Discussion
- All: AOB
(29-Apr-2005:) Proposed list of what data might be needed from MCC/Accelerator Control System, from Bill Bugg: [xls Spreadsheet, 14kB]
(02-May-2005) A meeting on this on Monday afternoon changed this list to this one here[txt]
Weekly meeting of Wednesday, April 27, 2005 at 9:00 a.m. PST. Announcement
Agenda:
- Hast: FFTB Start Up Status
- Sheppard: PS Checkout
- Bharadwaj: E166 User Training Requirements/Work at SLAC/Arranging a Trip to SLAC ( (message) - FFTB RestartPlan - ILC Policy for Visitors [PDF] ).
- Poeschel: Visit to SLAC May 7+ 4 weeks
- Bugg: Things to Do (message)
- All: AOB
Weekly meeting of Wednesday, April 20, 2005 at 9:00 a.m. PST. Announcement
Weekly meeting of Wednesday, April 13, 2005 at 9:00 a.m. PST.
(No announcement was posted).
View photos by Kirk from the installation of the positron spectrometer magnet in the FFTB tunnel on Monday 11 April in this directory here
Weekly meeting of Wednesday, April 6, 2005 at 9:00 a.m. PST.
Announcement
Agenda proposed by Bill: Update on status of priority items
(perhaps following messages by Kirk MacDonald of today : Status on 1Apr05
and in the March 2005 e166-l archive, in particular:
Undulator Table | Gamma Detector Table | Positron Spectrometer.
For reference: e166-l archive for March, 2005 and e166ops-l archive for March, 2005
The next weekly meeting is Wednesday, March 30, 2005 at 9:00 a.m. PST.
(The call-in number had apparently expired.) Announcement
24 March 2005: Photos from visit of Gudi, Georg, Hermann are in this directory (web gallery to come later, location may change)
There is no weekly meeting on Wednesday, March 23, 2005
There were several talks of interest at the 2005 International Linear Collider Workshop, LCWS 05 , among them:
In the Parallel Session on Accelerator Physics Topics
- Vinod Bhardawaj Polarised positron sources at the ILC, PDF(1 MB)
- Roman Poeschl, Status of Experiment E166 at SLAC, PDF(1.1MB);
- Tsunehiko Omori. Polarized Positron Generation Experiment at KEK-ATF, PPT(1.3MB);
- In the SUSY Parallel Session, Uriel Nauenberg, The Importance of Positron Polarization, and the Deleterious Effects of Beam/Bremmstrahlung on the Measurement of Supersymmetric Particle Masses and other Parameters, PPT(1.2MB); and
+ Gudrid Moortgat-Pick (CERN): Polarization (Plenary/Summary Talk) pdf.
Weekly meeting of Wednesday, March 16, 2005 at 9:00 a.m. PST.
Announcement
Friday 11 March 2005 at SLAC (Cascades Conf. Room), 10:30 PST: Presentation by
Karim Laihem, on Geant Simulation for the E166 Experiment, [ Powerpoint, 30 slides, ~6 MB].
Weekly meeting of Wednesday, March 9, 2005 at 9:00 a.m. PST. Announcement
Weekly meeting of Wednesday, March 2, 2005 at 9:00 a.m. PST.
(In absence of John and Vinod; open discussion) Announcement Minutes
For reference: e166-l archive for February, 2005 and e166ops-l archive for Febuary, 2005
Weekly meeting of Wednesday, February 23, 2005 at 9:00 a.m. PST, Announcement
Weekly meeting of Wednesday, February 16, 2005 at 9:00 a.m. PST, Announcement
Weekly meeting of Wednesday, February 9, 2005 at 9:00 a.m. PST, Announcement
Weekly meeting of Wednesday, February 2, 2005 at 9:00 a.m. PST, Announcement
Note by Karim Laihem, Ralph Dollan, Zenon M. Sazlata on the
'High-Gain Low-Gain Correlation' for the CsI(Tl) calibration, [ pdf, 22 p., 316 kB].
For reference: e166-l archive for January, 2005. There were no messages in e166ops-l archive for January, 2005
Weekly meeting of Wednesday, January 26, 2005 at 9:00 a.m. PST,
Possibly interesting paper: R. S. Hicks, P. Decowski, et al., Flux Profile Scanners for Scattered High-Energy Electrons,
[ pdf, 23 p., 2.4 MB]. It describes flux integrating Cerenkov scanners with air-core reflecting light guides used in E-158.
Weekly meeting of Wednesday, January 19, 2005 at 9:00 a.m. PST,
(From JCS's Message:) Still slow here at SLAC. Things may be picking up. SPEAR3 is beginning turn on. Not much word in regards to the FFTB.
The 2nd weekly meeting of 2005 was Wednesday, January 12, 2005 at 9:00 a.m. PST,
- Beam Request/Temp Gamma Dump [ pdf 31kB]
- Any SLAC Schedule Update?
Happy New Year! The first weekly meeting of 2005 is Wednesday, January 5, 2005 at 9:00 a.m. PST,
(SLAC Schedule [as far as known {which might be nothing}])
For reference: e166-l archive for December, 2004 and e166ops-l archive for December, 2004
The last weekly meeting of 2004 was Wednesday, December 15, 2004 at 9:00 a.m. PST,
From Announcement: Discussion of Run Plan for 2005: Two runs: in March, 2005 and then after about the middle of May, both for 1 month were suggested.
Weekly meeting of Wednesday, December 8, 2004 at 9:00 a.m. PST,
From Announcement: Still have not heard back anything regarding operations schedule....your guess is as good (or better) as mine. (oh yes this text looks a lot (EXACTLY!) like last week's.)
Weekly meeting of Wednesday, December 1, 2004 at 9:00 a.m. PDT,
(30-Nov-2004) Peter Schuler's Images describing the Shielding Layout (Web Page)
For reference: e166-l archive for November, 2004 and e166ops-l archive for November, 2004
Weekly meeting of Wednesday, November 24, 2004 at 9:00 a.m. PST,
Still nothing known about operations schedule.
Weekly meeting of Wednesday, November 17, 2004 at 9:00 a.m. PST.
Weekly meeting of Wednesday, November 10, 2004 at 9:00 a.m. PST,
The call-in number is , as before, 510-665-5437, the meeting number 0211 also as before. Indeed meeting is taking place as I type this, with Vinod, Carsten, Zen, Achim, at SLAC, Steve B., Bill B., Alexander M, .K-Peter S.,....by phone. Discussion was mainly about when SLAC Accelerators could possibly start up again (later than one thinks); and inquiries about rumors about possible run plans for 2005 (nothing known as of now).
Note the first announcement for a Workshop on positron sources for the ILC, to be held at Daresbury, April 11-13, 2005. [See Workshop Web Site]
Weekly meeting of Wednesday, November 3, 2004 at 9:00 a.m. PST,
The call-in number is, as before, 510-665-5437, the meeting number 0211.
(Well, apparently it had changed, which canceled the meeting; try again next week) At SLAC, it is in the ESA Counting House
Discussion topics:
Continuing safety standdown: - what is going on here at SLAC,
- speculate on what's going to go on here at SLAC,
- goals for the period between now and when the tunnel locks up, and
- the January scheduled run.
- It is also very important to write down what we learned from the 2.5 days of running and what needs to be done based on that.
Weekly meeting of Wednesday, October 27, 2004 at 9:00 a.m. PST,
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House
More E166 Photos from John Sheppard.
(25-Oct-2004) From John Sheppard, Undulator Table Movers Description, pdf .
More Electrical Safety Classes are available this week here(ESH WebSite)
Weekly meeting of Wednesday, October 20, 2004 at 9:00 a.m. PST,
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House
Major Topic: Safety First! We are still in a safety standdown here at SLAC.
SLAC employees and Users need to read a variety of safety documents, and acknowledge that they have done so; and, among other things,
- take another Electrical Safety Class, ES&H Course 239, ( Schedule and Info)
- complete a Job Hazard Analysis and Mitigation (JHAM) study & form.
See the task list [ xls pdf (print out, complete tasks, discuss with Supervisor (jcs)], And also look at:
- The SLAC Page Safety First Documents ;
- the BaBar Page Safety Comes First (has links to Sample Office work JHAM, Office checklist, NOAA Office Safety Module and required test).
Finally, as an example, you can look at Vinod's JHAM: MS Word doc or (better!) Open Office sxw.
Special Phone Meeting: Thursday October 14, 2004 at 10:00 a.m. PST.
The call-in number is, as before, 510-665-5437, but the different meeting number is 4606.
At SLAC, the meeting is in the ESA Counting House
Purpose of meeting is to discuss impact of stop of accelerator operations on E-166. See message from John Sheppard.
Due to an accident in Sector 20 of the Linac, a Safety-Standdown has been ordered;
(accelerators off, no work on hot circuits >50V or > 10 J, no lock/tag out work, no hoisting/rigging);
see Director's Memo MS Word doc
For reference: e166-l archive for October, 2004 and e166ops-l archive for October, 2004
Notice, that the mailing lists don't do well with attachments;
for short messages, it is better to copy them as text into the body of your message; even many tables can be easily read as text files;
for formal memos/papers/drafts, posting to your web site and sending the link is best.
The mailing lists also reject postings with more than 100,00 characters; if you include a smallish Word file, this can easily be exceeded (even when the actual message, as text, is rather small).
If you send me files which are too big for the mailing list, or not of text format (such as figures, ps, pdf), I'll post them to the E-166 internal web typically on the day I receive them (and you can refer to them as 'to be posted on the internal E-166 web site, http://www.slac.stanford.edu/exp/e166/internal/ .'
Below, I copied some of the Word/Excel documents recently found on e166ops-l:
Here are attachments to e166ops-l emails a which recently were sent out`:
(11-Oct) J.C. Sheppard, FFTB-Tunnel-Activities MS Word doc
(07-Oct) J.C. Sheppard, 10-08-Weekend Running Plan MS Word doc
(10-Oct) Yuri Efremenko, Updated DAQ Format, MS Excel xls This is a corrected version of as Saturday evening 09-Oct-2004.
(11-Oct) Rainer Pitthan's ToDo List MS Excel xls
Photos of FFTB taken Friday afternoon 08-Oct-2004: Web Page
No 9:00 a.m. telphone meeting on Wednesday, October 6, 2004.There's 'lots of work to do and we are meeting every day at 3:30 PP each afternoon.' FFTB will be locked up Friday afternoon (Oct.8), and have 28.5 GeV beam to the dump thereafter. for check of new equipment. E-166 installation to be continued/finished on Monday, Oct.11..
(01-Oct-2004) Photos taken Friday, 01-Oct-2004 (by John Sheppard) of the Princeton Magnets and Undulators in SLAC's Magnetic Measurements Lab, and more Photos of FFTB taken Friday afternoon.
For reference: e166-l archive for September, 2004 and e166ops-l archive for September, 2004
The next weekly meeting is Wednesday, September 29, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Agenda:
- Updates from all: Kirk, Achim, Peter, Alexander, et al.
- Who needs something/info from somebody else?
- Equipment Checkout Status: All
- D10 Operations and Electrical Safety (again): Bharadwaj
- Cabling and Database Status: Sheppard et al.
- E166 Shift Discussion: Bharadwaj et al.
- AOB
(25 Sep 2004) From Kirk McDonald: Assembly of the solenoid and 2 90-deg bend magnets was completed, photos in his Web directory
The next weekly meeting is Wednesday, September 22, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Agenda:
- Updates from all: Kirk, Achim, Peter, Alexander, et al.
- Who needs something/info from somebody else?
- Equipment Checkout Status: All
- D10 Operations and Electrical Safety: Bharadwaj
- AOB
The undulator had arrived from Cornell, and Alexander and John took first measurements of the inner aperture.
Here are some photos taken Friday, 17-Sep-2004 (by Achim W.) of the Undulators in SLAC's Magnetic Measurements Lab (and also some FFTB photos showing where it and other E-166 equipment will go).
(15-Sep-2004)From Bill Bugg, Suggested ntuple data format (and supplemental information about the contents). MS Excel xls Please report any erros or suggested changes to Bill.
The next weekly meeting is Wednesday, September 15, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Agenda:
- Updates from all: Kirk, Achim, Peter, Alexander, et al.
- Who needs something/info from somebody else?
- Equipment Arrival Schedule: All
- Radiation Safety Committee Approval: Bharadwaj
- AOB
The next weekly meeting is Wednesday, September 8, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Agenda:
...lot like last week.....We are working on the installation, checkout, and operations schedule. It would be good if everyone can say when you expect your equipment to show up at SLAC and how the checkout is going.
The ECFA Linear Collider Workshop will have a talk on E-166 by Karim Laihem in the 'Polarization combined with BDIR' session here (as well as a "Discussion: Compelling physics case for polarised positrons" here)
The next weekly meeting is Wednesday, September 1, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Agenda:
- Updates from all: Kirk, Achim, Peter, Alexander, et al.
- Who needs something/info from somebody else?
- Equipment Arrival Schedule: All
- Trigger: Bugg and Bharadwaj
- AOB
John Sheppard will give a talk to operations staff at MCC on Wednesday 01 September 3p.m..; Powerpoint , 10+ MB
(19-Aug-2004) From Bill Bugg , for internal discussion on data formats,
- Desirable quantities in header: MS Word doc;
- Proposed fixed data format to be prepared from the DAQ output file for analysis by PAW: MS Exel xls
(Note Correction: VME starts with channel 49 or the 52nd word in the ascii file).
(11-12-Aug-2004, updated from Hanoi Hotel Lobby) From Peter Schuler, Photos of Efremov magnets 1 jpg 2 jpg
(06-Aug-2004 from Hanoi)Updates of earlier (June) memos from Roman Poeschl:
RP-Spectr_062204 ps RP-Spectr_060904 ps Memo 6 ps
Anything you want to publish, send to John or Vinod, who'll put it in a directory on
Windows here (Windows August Directory) ----
and they'll say in a mailing list message where it went.
(After my return, the Windows August directory was found to contain 4 files by John Sheppard, dated July 27, which are also listed here:
- PC_Shielding_7-23-04.pdf ;
- Steady State Beam Losses in E166.doc
- tempgammadump.pdf
- Undulator Aperture and Table Positioning Bench Testing.doc
( For reference: e166-l archive for August, 2004 and e166ops-l archive for August, 2004
(see below for July).
Achim Weidemann submitted a ~8-page review of E-166 to ICHEP04 the 32nd International Conference on High Energy Physics, Beijing, China, 16-22 August 2004, entitled Polarized Positrons at a Future Linear Collider and the Final Focus Test Beam, SLAC-PUB-10581, July 2004 [ ps 1.3MB | pdf 311 kB ]
to go with a poster [ Power Point, 2.5 MB, 8 by 16 inches (print at 290% magnification on 24x48 paper)] shown there.
Achim also gave a talk at the 5th Rencontres du Vietnam - Particle Physics and Astrophysics conference (Hanoi, VN, 5-11 August 2004) ( in the Physics at Future Accelerators Parallel Session) [Powerpoint, 2.7 MB] . The conference contribution is also entitled Polarized Positrons at a Future Linear Collider and the Final Focus Test Beam, SLAC-PUB-10842, November 2004, ~4pp+ and available here as [ ps 775 kB or pdf 281 kB]
Achim will be away from SLAC (at RdVN and ICHEP 04 conferences) July 29- Aug.25. Please consult the mailing lists (links above) for updated information. Presumably, there will be weekly meetings on Aug. 4,11,18, and 25, and many informal ones in Bldg. 407 during installation.
e166-l archive for July, 2004 and e166ops-l archive for July, 2004(ordered by date)
The next weekly meeting is Wednesday, July 28, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Agenda:
(See mailing list/ 'August' directory above)
(26-Jul-2004) From Steve Berridge: configuration information for E166 detectors latest update: xls Excel Spreadsheet
Weekly meeting of Wednesday, July 21, 2004 at 9:00 a.m. PDT.
. Agenda:
- Updates from all
- Who needs something/info from somebody else?
- E166 Beam Line Optics: Rick Iverson ( Twiss and Kmods [ pdf 21 kB]
- Beam Set Up: John Sheppard ( Beam Set Up Tasks for E-166 [ pdf 20kB]
- AOB
(20-Jul-2004) From Steve Berridge: configuration information for E166 detectors updated after detector installation: xls Excel Spreadsheet(obs.)
(19-Jul-2004) From Steve Berridge: configuration information for E166 detectors xls Excel Spreadsheet(obs)
With E-164 to E-165 switchover this Tuesday 20 July, there is FFTB acces, and Steve will install the final version of the GCAL/SiC detector (though not yet in final position).
Weekly meeting of Wednesday, July 14, 2004 at 9:00 a.m. PDT.
Agenda:
- Updates from all
- Who needs something/info from somebody else?
- BPMs and Toros into DAQ (TMIT Good, working on BPM position) jcs, vb
- AOB
(09-July-2004) From John Sheppard, TORO CB02 6130 read into E-166 DAQ/ Comparison with SCP, txt; Figure Jpg ; fig ?
(07-July-2004)
- From Peter Schuler: first and preliminary results from the eddy current simulation,
. Description: txt; Figure: pdf (Previous version: Ms Word doc)
Weekly meeting of Wednesday, July 7, 2004 at 9:00 a.m. PDT.
Agenda:
- Updates from all
- Who needs something/info from somebody else?
- AOB
e166-l archive for June, 2004 and e166ops-l archive for June, 2004(ordered by date)
(30-June-2004)
- From Kirk McDonald, First AutoCAD sketch (dated 3 June 04) of a possible placement of (modified) aerogel counters around the gamma polarimeter magnet -- including a "modest" amount of lead shielding. Top and front (=beam) views are shown. The bricks are, of course, 2" x 4" x 8".[ JPG , 57 kB | DWG ]
- From John Sheppard, How to run a SCP from Home etc., pdf 19 kB.
The next weekly meeting is Wednesday, June 30, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Agenda: TBA.
(25-26 June 2004)
- From Roman Poeschl, new remarks on background issues (Status report - Spectrometer Simulation - Backgrounds Issues) PS 3.5MB
There is good hope that it is possible to eliminate the 'bad' photons nearly completely and that it is not meeded to modify the most recent layout from Kirk.
- From Vinod Bharawadj, Proposal for the E166 Trigger Logic Powerpoint 88kB
(24 June 2004)
- From Karim Laihem: List of Required Logical Modules, Scheme of CsI Photodiode Readout pdf 2p., 18 kB]
- From Kirk McDonald: Updated Spectrometer Drawings at Princeton [html ]
The next weekly meeting is Wednesday, June 23, 2004 at 9:00 a.m. PDT.
The call-in number is, as before, 510-665-5437, the meeting number 0211.
At SLAC, it is in the ESA Counting House. Please retry if you encounter connection problems. We will be trying to re-establish the connection from SLAC if we get an invalid meeting id as 2 weeks ago. On the Agenda:
- Who and When at SLAC: Sheppard
- Cable Plant Activity: Hast
- Fe Absorber Status: Schuler
- Trigger Proposal: Bharadwaj
- Electronics Inventory: Bharadwaj, Szalata
- Equipment Updates: Undulator, Lens and Dipole, CsI, Controls, PS: All
- AOB
Materials for Meeting (Some added just after meeting):
- Proposed Timing Scheme (Vinod Bharadwaj) [Power Point, 29 kB]
- Roman Poeschl, Spectrometer Geometries (for simulation, as discussed at meeting) html
- Steve Berridge, Detector DAQ_Needs v.2, Excel xls
- Kirk McDonald, 4 drawings extracted from present sketch of the positron transport system.
. Front jpg Side jpg Ray8 jpg Top jpg [110-148kB each]
. KMcD notes, some narrowing of the vacuum chamber in the first bend magnet would be possible, if really useful.
(Updated 17-Jun-2004, 30 June 2004) From John Sheppard, How to run a SCP from Home etc., pdf 19 kB.
Weekly meeting of Wednesday, June 16, 2004 at 9:00 a.m. PDT:
On the Agenda:
- How to SCP: Sheppard
- New E166 Spectrometer memo: Batygin (See below)
- Spect. Dipole Status: McDonald
- Power Supplies, Cable lugs, Cable Installation: Sheppard
- Initial Beam SetUp: Sheppard (see below)
- Equipment Deliver Schedules: Undulator, Fe Absorbers, Lens and Dipole, CsI: All
- AOB
From Steve Berridge: E165 run data. 1st page is run 112 during tuning (see notes on top of pages) 2nd pg is run 116 PDF 2.5 MB
From Yuri Batygin: E-166 spectrometer memo on pole surface profile of bending magnets, PDF, 53 kB
From John Sheppard: Note regarding first beam through the undulator, [MS Word doc 42 kB];
Note on beam interception at the undulator collimator, [MS Word doc 31 kB]. [pdf 16 kB].
The issue here is how much beam we can run with out violating beam containment. Presumably 3x10^9 at 1Hz is okay. Enough beam to light up the diagnostics but likely not enough rate to keep the feedbacks on in the FFTB. It is possible that we can run beam to the BSY at 10 Hz and to FFTB at 1 Hz and then the upstream stabilization is active. Please make comments. It is time to start developing the beam task lists so we can assemble a run plan with realistic time estimates
Achim Stahl's Notes from discussions at the last Collaboration Meeting: ASCII text 8kB.
Weekly meeting is Wednesday, June 9, 2004 at 9:00 a.m. PDT.
On the Agenda:
- Background Report: Bugg and Berridge
- Spect. Dipole Status: McDonald
- Detector Table Layout: Munro
- Power Supplies: Sheppard
- AOB
Materials for meeting:
- Bill Bugg on Backgrounds: Run log: PDF 973 kB; Backgrounds summary: PDF 300 kB.
- John Sheppard's Power Supply list R8 pdf 81kB
- Memo by Roman Poeschl on Spectrometer ps 1.23 MB
(08-Jun-04) Memo by Yuri Batygin on Positron Transmission in Spectrometer as a Function of Field Index for non-parallel poles in bending magnet, pdf, 2p., 26 kB .
(03-Jun-04) Photos from the Zeuthen Collaboration Meeting were posted by Kirk McDonald here (in a new Webpage combining some of Kirk's and Vinod's pictures).
(02-Jun-04) Memo by Roman Poeschl on Spectrometer, [PS, 12pp, 1.3 MB])
Weekly meeting Wednesday, June 2, 2004 at 9:00 a.m. PDT. On the Agenda:
- Background Report: Bugg and Berridge
- Neutron Detectors: Va'vra
- Spect. Dipole Status: McDonald
- Detector Table Layout: Munro (New Figure of Table: [PDF, 44kB]).
- AOB
Also, on Wednesday, at 2 p.m. will be a meeting on Power Supplies in John Shepperd's office.
Note: This Thursday, 3 June 2004, is a ROD with acess to FFTB.
e166-l archive for May, 2004 and e166ops-l archive for May, 2004(ordered by date).
(See 03-JUN-2004 update above; ignore these ) Photos from the Zeuthen Collaboration Meeting were posted by Kirk McDonald here (Photo 118 and up) and Vinod Bharadwaj here. [Both Web directories].
(27-May-2004) From Alexander Mikhailichenko, Comments on the spectrometer discussed at Berlin meeting. PDF 842 kB
(24 May 2004) From Bill Bugg (Copy of entry in the Electronic Logbook for that day):
Timelines of calibrated detectors for run 71. Plotted are all counters vs time and a few interesting correlations. also included is a file of proper calibration constants for each detector (Except C1,C2 which are not yet calibrated.).
Presentation: Powerpoint, 19.4MB; Calibration constants and method: ASCII text,3kB
24-26 May: Collaboration Meeting in Zeuthen:
Local Information, how to get there: [html]) ; Updated Agenda .(updated after May 19 Phone Mtg.)
Weekly meeting Wednesday, May 19, 2004 at 9:00 a.m. PDT, Agenda:
Power Supply Status: Sheppard et. al.
Spectrometer Dipoles Status: McDonald
BPM/TORO Progress: Bharadwaj
E166 Collaboration Meeting Agenda: Stahl ( Draft Agenda )
AOB
John Sheppard's Power Supply list, as discussed in a local meeting of 18-May-04: [MS doc 90kb]
This is the last meeting before the Collaboration Meeeting in Zeuthen.(See here [html])
(15-May-2004) Kirk McDonald, Summary of main points from meetings on 5/6 and 5/11, on the E-166 gamma line, and on the positron spectrometer. [html] .
Weekly meeting Wednesday, May 12, 2004 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in the ESA Counting House this time!!.
Power Supply Status: Sheppard et. al.
Spectrometer Dipoles Status: McDonald
Walz Visit to Cornell: Mikhailichenko, Walz
Background Modeling: Poeschel
BPM/TORO Progress: Bharadwaj
E166 Collaboration Meeting: What needs to be accomplished: All
AOB
(11-May-2004) Yuri Batygin, Memo on edge (de)focusing in E166 spectrometer [PDF, 108kB]
(06-May-2004) Status Report of Spectrometer Simulation, Memo by Roman Poeschl, [PS,18pp., 2.8 Mb] .
Yuri Batygin,Positron Transmission and Polarization in E-166 Spectrometer, April 2004, SLAC-PUB-10407 [html]
Weekly meeting of Wednesday, May 5, 2004 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
Agenda: Power Supply Status: Sheppard et. al.
E166 Electrical Safety: Perry Anthony
Spectrometer Dipoles Status: McDonald
Background Modeling: Poeschel(?)
BPM Progress: Bharadwaj
Detector Table Layout: Munro
E166 Collaboration Meeting: What needs to be accomplished: All
AOB
An updated PS list and a FFTB beamline map is in John Sheppard's directory: here
Weekly meeting of Wednesday, April 28, 2004 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
Agenda:Open
Weekly meeting of Wednesday, April 21, 2004 at 9:00 a.m. PDT,
Agenda: (see below)
Items received for discussion at the April 21 meeting:(Posted afterwards)
From Roman Poeschl, First (preliminary) results on spectrometer studies, Memo, [PS, 3.2MB]
From Rainer Pitthan: Importance of Having a Straight Undulator, Memo [txt, 2kB]; Figure [PDF, 171kB].
Kirk McDonald's E-166 positron spectrometer design updates no. 5-9 , concatenated into one text file [ascii text, 12.5 kb]
(4/16/2004) Message from Bill Bugg on CsI Data text and Spreadsheet xls [Microsoft Excel ].
Weekly meeting of Wednesday, April 14, 2004 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
Agenda:
- E166 Power Supply List: Sheppard et al.
- Kirk McDonald's E-166 positron spectrometer design update no. 5 html
- AOB
Weekly meeting of Wednesday, April 7, 2004 at 9:00 a.m. PDT,
Agenda:
- E166 Power Supply List: Sheppard et al. MS doc 47 kB
- Detector Table Layout: Munro (Drawing by L. Erikson et al, jpg 58 kB or pdf 38 kB.);
- Pulser-Undulator Update: Mikhailichenko pdf 454 kB;
- ELOG: Berridge ( ELOG Sample Page);
- Equipment Update: All;
- AOB.
(07 Apr 2004) Spectrometer design and drawing from Kirk, Update 4: ASCII text;
top view: JPG 153 kB, side view: JPG 111 kB , end view: JPG ~90 kB , AutoCAD Mech Desktop 2004: DWG file 108kB
(05 Apr 2004) From Alexander Mikhailichenko: Latest about pulser and undulator: pdf 454 kB
(04-05 Apr 2004) Spectrometer design and drawing from Kirk, Update 3: ASCII text;
top view: JPG 92 kB, side view: JPG 75 kB , end view: JPG 55kB , Dwg file: DWG file 108kB
and comment by Alexander: ASCII text; dwg file: DWG file, 1.4MB
(4/1/2004) From Carsten Hast, FFTB Schedule from now to Jan. 2005 [ ASCII text].
(3/31/2004) From Richard Iverson, FFTB Optics for E-166 (with BETAX=BETAY=10.0m, ALPHAX=APHAY=0.0 at marker named "E_166"(z=303.7meters)):
Transmittal letter ASCII text; Dimad deck: ASCII text, 876 lines; Dimad Output from that deck: ASCII text, 1,270 lines (right-click link to download).
Weekly meeting of Wednesday, March 31, 2004 at 9:00 a.m. PDT,
Agenda: TBA (on mailing list)
Zenon Szalata's DAQ Documentation, MS Word, 42 kB 5p.
Weekly meeting of Wednesday, March 24, 2004 at 9:00 a.m. PDT,
Agenda: TBA (on mailing list)
Recent items:
- Our new set of Milestones [PDF], established by John Sheppard on March 23, 2004.
- Thomas Schweizer's E-166 Staus Report at the Paris LCWS: Powerpoint 5MB
- Achim Weidemann's paper submitted to e-e-03: PS 1.3MB
Weekly meeting of Wednesday, March 17, 2004 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
Agenda:
- How are things going
- When does stuff arrive at SLAC
- What needs to be done at SLAC prior to installation
- Installation and Check-Out
- Tune-up and Running
- Staffing Plans
- Collaboration Meeting:
- AOB
The weekly meeting of Wednesday, March 10, 2004 at 9:00 a.m. PDT,
is canceled, (at least, nobody from SLAC will attend) as many SLACers are at the Geant4 Workshop.
Instead, send progress reports or other discussion items to the mailing list.
T-467 Operations may resume, as per this memo [pdf, 65kB | MSWord 82kB] by Sayed H. Rokni of March 4, 2004.
(03-Mar-2004) From Kirk: Alexander's latest AutoCAD Mechanical Desktop drawing of the E-166 positron spectrometer magnets is available from Kirk's Web site as a Zip, 4.2 MB file (or as dwg, 8.4 MB (AutoCAD Mech Desttop drawing) file, but the latter seems to be read-protected).
The big change is the combination of the two 90 deg bend magnets into a single structure, so that the magnetic flux of one magnet is "returned" through the other.
Weekly meeting of Wednesday, March 3, 2004 at 9:00 a.m. PDT,
Agenda:
- T467 Safety Coordination: Sheppard, et al. (Stay-Clear Poster, [pdf 52kB]; Appointment of Safety Officers, [MS Word, 54kB];
- E166 Cables: Bower ( Sketch of Bldg. 407 Electronics/Cable tray from Gary Bower [htm loading 421kB JPG] )
- CsI Activities: Stahl
- 10 Hz vs. 30 Hz Operation: Sheppard, et al.
- SCP Database Discussions: Bharadwaj
- Hardware Development Mini Updates
. . Beamline Hardware: Sheppard
. . Undulator: Mikhailichenko
. . e+ Spectrometer Magnets: McDonald
. . Magnetized Fe Absorbers: Schuler
- AOB
From Alexander Mikhailichenko, Last Developments of Spectrometer (with bar), Feb. 27, 2004 [pdf, 4p., 1.56 MB
The Manual by Achim Stahl and Roman Poescl, Instructions on the Operation of the CsI Crystals (latest version dated 26-Feb-2004 ~ 6:04 p.m.) is now available here [PS, 2.4MB] (and also in the blue binder in Bldg. 407)
Weekly meeting of Wednesday, February 25, 2004 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
Agenda:
- FFTB Tunnel Activities: last week and this week: Group
- T467 Safety Violation: Weidemann, Sheppard, et al. *
- DESY CsI Activities: Poeschel and Stahl
- SCP/DAQ Discussion: Szalata, Bharadwaj,....
- Hardware Development Mini Updates:
-- Beamline Hardware: Sheppard
-- Undulator: Mikhailichenko
-- e+ Spectrometer Magnets: McDonald
-- Magnetized Fe Absorbers: Schuler
- AOB
* A separate meeting on that topic will also occur in MCC at 11:00 on Wednesday.
Our change in setup for T467 has been approved by Radiation Physics, as shown in this memo by Heinz Vincke here[pdf, 507 kB]
Photos by Alexander Mikhailichenko showing undulator fabrication at Cornell are here
Photos from the installation of detector shielding during access of FFTB on Wednesday, February 18, 2004 taken by Vinod Bharawadj can be admired here and those by Javier A. Sevilla here.
More Photos, taken Friday, February 20, 2004 by Vinod are here and those taken by Terry Tuck, (also Friday, February 20, 2004) are here
Weekly meeting of Wednesday, February 18, 2004 at 9:00 a.m. PDT. Lead (Un)Stacking Day!
This time, we'll meet in Bldg 407, next to FFTB, (Phone: 650-926-5464) and then make use of the FFTB access to go in and remove all lead from the table, (Photo here ) [jpg, 179 kB] and install the new CsI Detectors brought by Achim Stahl and Roman Poeschl, and then restack it all into a neat lead castle.
(An Access plan by Gary Bower is here [txt]; an Aerogel reconfiguration request from Kirk here [txt])
Those not at SLAC may still meet telephonically: the call-in number is, as before, 510-665-5437, the meeting number 0211.
(Feb 16, 2004)From Alexander Mikhailichenko:
Last Variant of Bending Magnet, [ pdf, 226 kB, 3p (pdf kindly produced by Kirk)| MS Word .doc, 2.4 MB (no p.3/table?)]
(Feb.13, 2004) From John Sheppard: Schematic overview figure of E-166 Apparatus, to be shown at a meeting with members of Controls Group on Tuesday 17 Feb 2004 2:00 p.m. in the MCC Conference Room; [pdf, , 1p, 146 kb]
New items (Feb.11, 2004):
From K. Peter Sch�ler, New layout 5a, which should give about 3x larger signals: [ pdf, , 13 kb]) or [ ps, , 40 kb])
From Steve Berridge, A photo of Table at end of FFTB (taken last October), [ JPG, 179 kB] (More photos, taken by Steve Berridge at the time, are also in this directory, shown at last October's Collaboration Meeting)
Weekly meeting of Wednesday, February 11, 2004 at 9:00 a.m. PDT,
Agenda:
FFTB Timing Signals: Sheppard
Report from Stahl and Poeschel
DAQ/Controls Discussion: Bharadwaj, Bower, Sheppard, Szalata
Background Modeling: Bharadwaj
Spectrometer Transport Update: Batygin ( New memo on positron transmission and polarization in E-166 spectrometer [ pdf, 7p, 409 kb])
Collaboration Meeting: All
Weekly meeting Wednesday, February 4, 2004 at 9:00 a.m. PDT,
John Sheppard's presentation of E-166 to SLAC Controls, 3 p.m. on Feb. 3, 2004 [ powerpoint, 20p, 5.5 MB]
and a draft list of E-166 equipment (for discussion at tomorrow's meeting), [ Excel, 35 kB]
Bill Bugg's note on E-166 DAQ and signals (1/29/2004) [ MS Word doc, 2p, 28 kb] and DAQ Channel list, [ MS Word doc, 3p, 35 kb]
Weekly meeting Wednesday, January 28, 2004 at 9:00 a.m. PDT,
Some Agenda Items suggested by JCS:
- SCP accounts
- Magnetic measurements
- Undulator charging supply
- CsI (status?)
- Is it too early to think about another collaboration meeting?
- DAQ Development Idea (Bower)
- Yuri Batygin et al., Comparison of Fluka, EGS4, Geant3 (for 50 GeV e- on 20 r.l. Pb) [ pdf, 5p, 711 kb]
- AOB
*** Also, note that there is now a new E-166 Operations mailing List, e166ops-l. (See above) ***
Weekly meeting of Wednesday, January 21, 2004 at 9:00 a.m. PDT,
From Alexander Mikhailichenko (19-Jan-2004):
Fields in positron transport system, with solenoidal lens on/off.
Explanation as txt, 1.7 kB (updated) ; CAD Drawing: DWG [CAD] file, 75 kB
Data files: Lens off: DAT (Ascii txt,36003 lines 1.14 MB ; Lens on: DAT (Ascii txt,36003 lines 1.14 MB The latter two files are also available at SLAC in the directory /afs/slac.stanford.edu/g/e166/simulation/positron-transport as
```
-rw-r--r--   1 achim    ey       1140862 Jan 19 14:38 2004-01-19-am-LENS_OF.dat
-rw-r--r--   1 achim    ey       1140862 Jan 19 14:37 2004-01-19-am-LENS_ON.dat
-rw-r--r--   1 achim    ey          1709 Jan 19 14:38 2004-01-19-am-dimensions.txt
```
so if you use Unix at SLAC, there is no need to copy them to your own directory.
From Alexander Mikhailichenko (14-Jan-2004):
- Undulator Schedule [ PDF, 202kB ];
- 3D Drawings of Positron Transport System, [ ZIP file, 3.9 MB unzipping expands it to MAGNET5.DWG of 9.8 MB + pkzip.exe]; (Magnets will be slightly different. They will not have a fringe angle.A.M.)
The next weekly meeting is Wednesday, January 14, 2004 at 9:00 a.m. PDT,
Tentative Agenda:
- T467 Update: McDonald, et al.
- Power Supplies/cable plant for CsI xtals and diodes: Sheppard, Hast, Stahl
- near term FFTB Access: Hast
- General Discussion on E166 Schedule: what and when
- AOB
Note the talks by Jym Clendenin, Yuri Batygin, John Sheppard at the ALCPG Winter Workshop's Sources session!
and the talk by John Sheppard (E-166 Update) at the December 2003 ISG 11 meeting at KEK: [ PDF at KEK , or PDF at SLAC, 25 p, 2.8MB]
The last weekly meeting had been planned for Wednesday, January 7 , 2004 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
Alas, the meeting (phone) reservation had expired, so there was no meeting.
Agenda:
- T467 Update
- FFTB Access in February / Installation plans (DESY group now plans to come here in mid-Feb.)
- General Discussion on E166 Schedule: what and when
- AOB
First memo of 2004: Alexander Mikhailichenko, Optics Development for Positron Polarization Analyses, [ pdf, 16 pp., 27 figs. 3.3 MB ]; shows optics calculations for positron spectrometer/transport line and issues to consider for fabrication.
Happy Holidays! And a happy, healthy and succesful New Year 2004!
Updated (Dec.18'03) FFTB Schedule from Carsten Hast txt
Weekly meeting Wednesday, December 17, 2003 at 9:00 a.m. PDT,
On the Agenda:
- Kirk's report of Cornell visit
- FFTB Access (see below)(Perm. Access: Dec.23 11pm to Jan. 5, 2004; permitted access in mid-Feb '04, and a week after that, to be confirmed by beginning of January, 2004)
- Dorfan Letter [ MS Word, 484 kB| [ps, 419 kB] (Posted after meeting; SLAC letter head [Director's Memo, December 9, 2003] apparently lost)
- plans at DESY & Cornell
- Yuri Batygin, GEANT3 simulation of background from high-energy electrons hitting collimator of undulator in E-166 FFTB beamline, [PDF, 4p., 187 kB].
- AOB
- References for a discussion at the meeting:
Yuri Batygin's memos of 8/27-28/2002 PDF,(12p) and 9/03/2002; pdf ( 4p.28 kB) and
LCC-0110, by YB and JCS, Post-target beamline design..., December 2002. pdf [17p, 1530kB].
And, a comment by Kirk McDonald txt
FFTB Schedule from Carsten Hast txt
Weekly meeting Wednesday, December 10 , 2003 at 9:00 a.m. PDT,
On the Agenda:
- T467 Update: Bugg, McDonald, et al.
- FFTB Access: Hast
- SLAC/Unix/AFS/g/e166 Access: Szalata, Sheppard, Weidemann
(Our afs directory is /afs/slac.stanford.edu/g/e166, if it is not world-readable, then it is visible for anybody with a SLAC account. To get one, see Accounts under SLAC Computing)
- Radiation Badges: Sheppard (see SLAC Dosimeters and Badges at: SLUO)
- Vinod Bharadwaj, First FLUKA simulation results, MS Word doc 350 kB )
- US ALCPG Winter Workshop: ALCPG04
- Running Schedule Discussions: Sheppard
- (Added after meeting:) Rainer Pitthan, Morry's New Layout figure PDF, 1 p., 108 kB (Indeed, mailing list bounced this, for being too long (>100000 chars).)
- AOB
Weekly meeting Wednesday, December 3 , 2003 at 9:00 a.m. PDT,
On the Agenda:
- Running Schedule Discussions: Sheppard, McDonald
- FFTB Activities / T-467 Plans
- Size, Layout of detectors and shielding for E-166 (Draft Figure jpg 47 kB )
- Yuri Batygin, GEANT3 simulation of background from high-energy electrons hitting internal part of undulator in FFTB beamline, [PDF,5p., 396 kB].
- AOB
Pictures of the CsI Detectors at DESY-Zeuthen with Photodiodes and PMT electronics, by Achim Stahl and collaborators
can be seen here [Web Page, with 20 jpeg images, takes a few seconds to load all]
The weekly meeting Wednesday, November 26 , 2003 at 9:00 a.m. PDT,
had been canceled (due to absences, including mine).
The previously planned Agenda will now be taken on on Wdn. Dec. 3
- T-467 Plans
- Size, Layout of detectors and shielding for E-166 (Draft Figure jpg 47 kB )
- Other topics to be announced by e-mail
- AOB
Note: I (Achim) will be away from SLAC 23-Nov to 01-Dec-2003
(and thus this website not updated before meeting). Happy Thanksgiving!
Also, from now on, I will have much less time for E-166 than until now.
The next weekly meeting will be Wednesday, November 19 , 2003 at 9:00 a.m. PDT,
On the Agenda:
- EPAC and Meeting with Dorfan: Kirk and John
- T467 Activities: Achim, Gary, Kirk
- FFTB Status: John
- AOB
The November 14-15, 2003 EPAC meeting schedule is here. Note a talk on Slow Positrons (Fri, 11:30), and of course,
Kirk McDonald's talk (Sat, 11:00), Status Report on E-166, shown here as pdf 2.6 MB or Powerpoint, 5 MB .
(12-Nov-2003) From Bill Bugg and Steve Berridge: on DAQ needs: Word doc (same as 10/26 version?); Excel xls
The next weekly meeting will be Wednesday, November 12 , 2003 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
On the Agenda/recently received:
- Alexander Mikhailichenko, Suggested Analysing Magnet, pdf, 788 kB ;
- Peter Schuler, Polarization Error Formulae, ps, 115 kB ;
- Peter Schuler, (Preliminary) Efremov design of magnetized iron solenoids,
- - 75 mm long for positron polarimetry doc, 127 kB ; eps, 405 kB ;
- - 150 mm long for photon polarimetry doc, 127 kB ; eps, 405 kB ;
- AOB
Gudrid Moortgat-Pick, Prototype for an Undulator-based Source for Polarized Positrons, paper for EPS 2003 has been submitted (11/11/2003) Gzipped PS ps.gz, 230 kB
Weekly meeting Wednesday, November 5 , 2003 at 9:00 a.m. PDT,
On the Agenda:
- Reminder for all to send Collaboration Meeting files to Achim for posting on the
Collaboration Meeting Talks page!!!!
(Better yet, send me a Web link from where I can download your file!)
- Progress with T-467 Installation, DAQ (AWW, GRB,..)
- Input to Kirk's Presentation to EPAC on Nov 15.
- AOB
(04Nov2003) Main pages of this web site moved to SLAC central web server; if a link is broken, try hitting 'Back,' then 'Reload' buttons on your browser.
(03Nov2003) Pictures of newly-installed T-467 Electronics in Bldg. 407:
Table with PCs, rack: jpg, 490 kB ; Rack detail, jpg, 490 kB
Pictures of DAQ system, LabView screen, jpg, 190 kB ; block diagram jpg, 134 kB ;
(31 Oct 2003) More T-467 detectors installed in FFTB, see FFTB Access report here.
No meeting on Oct.29, but please send in your Collaboration meeting talks, so they can be shown on the
Collaboration Meeting Talks Page here.
Bill Bugg's writeup of DAQ channels etc. [MS Word, 36 kB]
October 24-27, 2003 (Friday-Monday): E166 Collaboration Meeting & POWER Meeting at SLAC.
A few contributions / talks (as far as received) are here
Tudor Dimofte, Measurement of the Index of Refraction of an Aerogel, August 2003 [ Paper, PDF, 35 p., ~375 kB | directory with TeX source at Princeton]. (added later)
The next weekly meeting will be Wednesday, October 22, 2003 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
On the Agenda:
- Collaboration Meeting (vb)
- Various updates
- Yuri Batygin, Simulations of backgrounds from collimator or undulator for 28 and 50 GeV electrons, [PDF, 97 kB] (left/right in memo means upstream/downstream)
- AOB
LCRD Proposals for FY 2004-2006 are due to the LCRD group this Friday, 24 October; see instructions here. Princeton, Tennesse and South Carolina will submit a common proposal (edited by Kirk; final version, submitted on 24 Oct. 2003 is here [PDF, 429 kB] [ps.gz, 527 kB] ).
(10/16/03 )Memo from Achim Stahl on the electronics layout for the background test, including two figures and a table of the required hardware (and who will supply it) [html, 11.5kB]
The next weekly meeting will be Wednesday, October 15, 2003 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
On the Agenda:
- Collaboration Meeting (vb)
- Various updates: - Cables (grb)/ - DAQ (ap/grb/aw)/ - T467 (aw)
- AOB
The E166 Collaboration Meeting & POWER Meeting at SLAC on October 24-27, 2003 Web Site now shows a draft agenda, registered participants etc. Check it out! Do not forget to register (by sending email to Naomi Nagahashi naomi@SLAC.Stanford.EDU)
Weekly meeting Wednesday, October 8, 2003 at 9:00 a.m. PDT,
The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
Recently received:
- Gary Bower, The final Cable Count? ..continually updated from Gary's web site: Cable_count [PDF, 12k] and also Cabling notes [PDF, 127k]
- Yuri Batygin, Background simulation of undulator collimator (10/07/2003), [PDF, 76 kB]
T-467 Parasitic Beam Test short Description, for Radiation Physics approval,(AWW, 10/02/2003) [ascii txt, 4.7kB]
Weekly meeting Wednesday, October 1, 2003 at 9:00 a.m. PDT,
On the agenda:
(1) Collaboration Meeting Reminder: Vinod
(2) Cabling Status: Bower and Hast
(3) Spare Detectors (for background test)?
(4) Status of Parasitic Running: Weidemann/Pitthan
Addendum Draft to T-467 proposal [MS Word, 27kB].
(5) Meeting with Noble/Paterson: Sheppard
(6) Background Calculations: Batygin/Bower
Yuri Batygin, Angle-energy Distribution of photons made by 50GeV electrons hitting undulator, [PDF, 156 kB] (7) AOB
Remember the E166 Collaboration Meeting & POWER Meeting at SLAC on October 24-27, 2003
(E-166 Meeting: Fri 24 Oct - Sun 26 Oct noon; POWER meeting: Sun afternoon 26 Oct - Monday 27 Oct).
The Web Site for this meeting just appeared(9/30) and will soon contain an agenda.
If you plan to come:
- please send email to Naomi Nagahashi naomi@SLAC.Stanford.EDU to let us know which meeting you'll attend, and arrival/departure dates as far as you know;
- Reserve your room at the SLAC Guest House (Reservations - SLAC-Affiliated; enter 'E-166 Collaboration Meeting (J C. Sheppard- N. Nagahashi x2645)' as comments); note that there is the BaBar Week during the same week, so better reserve soon!
Weekly meeting Wednesday, September 24, 2003 at 9:00 a.m. PDT:
On the agenda:
(1) Oct 24 Collaboration meeting: Who's coming, attendance list;
(2) Goals for the backgrounds test: can we agree to what's written [refer to JcS memo below];
(3) Cable plant: do we have enough for Carsten [refer to GRB memo below];
(4) EPAC tentative meeting 14-15 November 2003 (might request report);
(5) Formal request to SLAC for FFTB beam time in January/February;
(6) Parasitic Beam test (now on-going): What can we learn, what are we doing, need to do?
(7) Yuri Batygin, GEANT3 simulation of background from 100 primary electrons hitting undulator, [MS Word, 160 kB] (See also item in Sept. 17 meeting).
(8) AOB
(9/22/03)From John Sheppard:
- E-166 Backgrounds Test Equipment (Beamline Hardware) memo, [MS Word, 260kB].
- Backgrounds-BeamTest-Hardware figure, [JPEG, 222kB]. (might be superseded by figure in memo above)
From Gary Bower: The final Cable Count? Please comment. [text, 1kB] [MS Word doc, 28kB] [PDF, 6kB]
Comments by Bill Bugg, of Sept. 18, on previous version of beam test goals, and suggestions for parasitic run [txt, 4kB].
From John Sheppard:
-(9/18) Memo on Shielding:
Transmittal letter [txt, 2kB] ; the memo [MS Word doc, 52kB] ; a figure of the hardware [JPEG, 211kB]
-(9/17)second DRAFT Memo on the Goals of the Background Tests: [MS Word doc, 106kB] or [PDF, 255kB].
This is Rev, 2 of the goals and success definition for the E-166 background tests. I have incorporated Peter's and Vahag's estimate for the signal on the CsI; up dated the text to reflect the 2 aerogel counters; and perked up the picture, in particular the stylized layout of the shielding. It is closer to what we should actually have. Please have a look, check the numbers, and send comments. This is becoming a working document in so far as it is guiding our planning for E166 background hardware. Also consider whether we should lower the threshold for success to say 50% measured noise/expected signal as per Bill's comment today. I am working up a quick note on why I think shielding of about 10**-8 attenuation is required/adequate. Hopefully we'll get some simulations to bear this out. John
Weekly meeting Wednesday, September 17, 2003 at 9:00 a.m. PDT,
On the agenda:
- Progress on current parasitic run (GCal, Si Sandwich installed - Bill; CsI Crystal - Achim)
- More on background test goals? (Final Cable count is helpful for EFD plans to install new cable trays);
- Preparation for Oct. 24-25 Collaboration Meeting; POWER meeting;
- Yuri Batygin's latest Geant3 simulation [pdf, 531kB]
- AOB
Weekly meeting Wednesday, September 10, 2003 at 9:00 a.m. PDT,
On the agenda:
-Background Test Goals (see memo by John, and expected CsI Signals Memo by Peter below);
- Parasitic Run Preparations;
.....
John Sheppard composed a DRAFT Memo on the Goals of the Background Tests [MS Word doc, 182kB] or [gzipped Postscript .ps.gz, 155kB]. and
Peter Schuler calculated the Expected CsI Signals Excerpt[txt, 1.4kB] or Memo[MS Word doc, 44kB] or Memo [postscript ps, 77kB]
(9/05/2003) A FFTB weekly DRAFT Schedule has been made by Dieter Walz: [Excel xls, 33kB] or [Exel-made html, 144kB+] E-166 related activities appear at bottom.
(9/05/2003) The milestones, ("Version 09.05.03") were updated today and are here [PDF]
A field note on cable archeology in FFTB, by Achim, [txt, 5kB] lists some possibly available existing cables.
A new version of the SLAC Accelerator Run schedule for this Fall has appeared, adjusted for E-158 extension until Sept.10; [MS-Exel, 17kB] [html, 15kB]
The next weekly meeting will be Wednesday, September 3, 2003 at 9:00 a.m. PDT, The call-in number is, as before, 510-665-5437, the meeting number 0211. At SLAC, it is in Bldg. 208.
(See Meeting Announcement, Info on Oct 24-25 Collab. Mtg, e166-l Mailing list here [ascii-text, 5 kB] )
On the agenda:
- October Collaboration Meeting: Set to Oct. 24-25 Friday-Saturday, to be followed by a POWER meeting.
- Pre-beamtest parasitic background studies goals, and
- ...installation status (Remember, FFTB will close Wdn Sept.10) - Yuri Batygin's first simulation (Geant 3) of a single electron hitting the iron tube [pdf, 93kB] [powerpoint, 159kB]
- Other items, to be determined.
Information on the internal mailing list, e166-l, is available here (but browsing archives doesn't work yet, it seems) and in a first mailing here [ascii-text, 5 kB] )
The next weekly meeting will be Wednesday, August 27, 2003 at 9:00 a.m. PDT, The call-in number is, as before, 510-665-5437, the meeting number 0211.
The SLAC Accelerator Run schedule for this Fall has appeared [MS-Exel, 17kB] [html, 15kB]
The next weekly meeting will be Wednesday, August 20, 2003 at 9:00 a.m. PDT, The call-in number is, as before, 510-665-5437, the meeting number 0211.
New items:
- Note from Bill Bugg on Cable Requirements [txt, 3kB]
- Steve Berridge reports that GCal will be ready to ship from Tennessee by next week.
- Setting time for the October Collaboration meeting: While there is a preference for Oct 10,11, some participants will not be available until a week later (detail, Oct. calendar) [txt, 2kB]
On Monday, August 18 at 10 a.m. PDT, in the Cascades Conference Room, there was a small meeting, called by Vinod, on parasitic accelerator tuning for the background tests starting mid-September. (Detectors available, cabling required, electronics and readout, beam tuning) (mostly for SLAC residents and accelerator specialists).
Vinod Bharadwaj's Notes [txt, 2kB] on this meetings (incl. assignments of some tasks)
(8/15) Jym Clendenin started a spreadsheet with milestones, here [PDF] which he will update, as more information becomes available.
(8/15) Note of 8/15/03 by Gary Bower, on DAQ planning for the background tests here [ascii text, 7kB].
The next weekly meeting will be Wednesday, August 13, 2003 at 9:00 a.m. PDT, NOT Thursday, as prevously announced! Rainer got our previous meeting spot back, so future meetings will be again always on Wednesdays. The call-in number is, as before, 510-665-5437, the new meeting number 0211. On the agenda:
- Simulations: what is needed?
See the updated note of 8/12/03 by Gary Bower, Simulation Requirements [pdf, 17kB]
(and also minutes of an informal meeting of Aug.11 [html, 3kB]
- DAQ - can we get by for the background test run by using the MCC control system? (see also the same minutes of that informal meeting of Aug.11 [html, 3kB]
- Will parasitic tuning of the beam work (October through December???)?
- Milestone - when do we need to run seriously for back ground (January 2004?)
- Jym Clendenin, Developing milestones to Jan. 2004 / Input requested [txt, 1kB]
Then,
- Yuri Batygin sent out a first simulation (Geant 3) of a single electron hitting the iron tube [powerpoint, 159kB]
The weekly meeting time changed from Wednesdays to Thursdays. The next one will be Thursday, August 7, 2003 at 9:00 a.m. PDT The call-in number is, as before, 510-665-5437, the new meeting number 0211.
Notes by Gary Bower on a meeting with Yuri B. and Vinod on background studies (on July 10?) [ASCII Text 4kB] [MS Word 30kB]
and a review of backgrounds by Gary Bower, dated July 31, 2003, [PDF 7kB] or [MS Word 35kB]
No meeting this week!: (i.e. on Wednesday 30 July 2003, at 9:00 am PDT, as per John's email)
Two items from the Saturday morning session of the Mini-Workshop on E-166 Background Tests:
- Task List [Ascii text, 1.4kB];
- DAQ Channel List [Ascii text, 2.3kB].
Earlier, we had also refered to the articles by S. Taniguchi, S.H. Rokni et al., Neutron Energy and tof spectra behind the lateral shield of a high-energy electron accelerator beam dump, Pt. I, Measurements, NIM A503(2003)595-606 and Pt. II, MC Simulations, NIM A503(2003)606-616 possibly available here (On some SLAC networks, this links to the articles, the SLAC PC on my desk at best gives the Abstracts).
This week's meeting: Wednesday 23 July 2003, at 9:00 am PDT. at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
Unfortunately phone connection didn't work (and person setting it up, as well as 'Meeting place' assistance were not answering their phones); so meeting was just at SLAC. We (at SLAC) informally discussed some background issues only, which will be taken up again tomorrow.
On the Agenda (had been, but not yet discussed):
- Report from Meetings: EPS Aachen: Gudi; ALCWS Cornell: John S., Kirk, Achim W. (See third item below for links to the talks);
- Background MiniWorkshop: Vinod (see agenda etc. below);
- AOB: All
Programme and details for the Mini-Workshop on E-166 Background Tests.
This Thursday through Saturday, 24-26 July 2003, we will have a Mini-Workshop on E-166 Background Tests at SLAC, described as follows:
As part of the preparations for running E166, our collaboration is required to demonstrate that the experimental backgrounds are low enough to get meaningful data on polarized positron production. These background tests will be scheduled for running during Dec 2003 - Feb 2004.
This workshop will discuss :
1. the sources and levels of beam backgrounds in the FFTB
2. electronic noise issues in the FFTB environment:
3. background simulations:
4. shielding strategy:
5. detectors and data acquisition:
The output from the workshop will consist of :
1. schedule and milestones for the background test preparations:
2. list of people and responsibilities:
3. list of action items:
There were 3 E-166-related talks at the American Linear Collider Workshop at Cornell, 13-16 July 2003;
in the parallel sessions of the
Electroweak Working Group (Achim) and the
Accelerator/Sources Working Group (Kirk, John).
and one at the International Europhysics Conference on High Energy Physics EPS (17-23 July 2003) in Aachen, where Gudi Moortgart-Pick's talk can be found as Item 4 in the
Accelerator R and D Session.
This week's meeting will be Wednesday 9 July 2003, at 9:00 am PDT. at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
On the Agenda:
A. Summary of the E166 meeting on July 3rd at DESY/Zeuthen
B. Discuss Backgrounds in FFTB
1. Backgrounds associated with particles lost upstream in the FFTB, and Neutrons from the dump at the end of the FFTB.
2. Backgrounds associated with the presence of the undulator.
3. Backgrounds as electronic noise from the RF content of the bunch.
C. Cornell Presentations
D. Plan for a miniworkshop on backgrounds at SLAC (next month or so)
Documents received:
Bill Bugg's thoughts on Background run: MS Word [27kB];
G. Moortgart-Pick's upcoming talk at EPS in Aachen: PDF [1475 kB]; gzipped PS [1556 kB];
Achim's talk at Cornell: MS Powerpoint [3316 kB]; gzipped PS [2306 kB];
This week's meeting will be Friday 27 June 2003, at 9:00 am PDT. at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 7780
On the Agenda:
- G. Moortgart-Pick's upcoming talk;
- Thursday's meeting of JcS with the E-166 backgrounds review and advisory committee, ppt[171kB];
- Talks at the American Linear Collider Workshop at Cornell, 13-16 July 2003. (JcS, KMcD will speak at the 'Sources' Parallel Session, Tuesday 15 July afternoon, AWW at the 'Higgs/Precision Electroweak' Session Tuesday morning).
A meeting Friday June 20, 2003, 9:30 a.m. PDT at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 7390
Agenda: In addition to telling ourselves how happy we are to have been approved, we need to discuss the particulars of the approval, long and short term E-166 schedules, funding/work milestones, meetings,....... We are on the hook for a background demonstration inline with final E-166 scheduling so we need to begin the discussion of the what, who, and when of this test.
Latebreaking News Wednesday, June 18, 2003: Kirk, Peter (by phone) and John had a meeting with Dorfan, Drell, Paterson, and Loew to discuss E-166 at 9:00 this morning. Results are here [txt, 2kB] and say, in short, that E-166 was approved! But we should first demonstrate that backgrounds are reasonable, before the final installation and data-taking run.
(Wdn Morning) While the rest of us is waiting with baited breath, our weekly meeting for today is canceled
As of Tuesday afternoon, there's no word from EPAC or SLAC Director yet.
Our presentation to EPAC on 12 June 2003 can be found here [Powerpoint, ~ 5MB]
EPAC asked questions; they and our answers are or here [Powerpoint, 306kB]
Weekly meeting Wednesday June 11, 2003 at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
Topic: John and Peter's Presentation to EPAC, on Thursday at 1:30 p.m. PDT.
The latest revision of our proposal (Sun, 08 Jun 2003 15:11) is here [PDF, 1332 kB].
The SLAC Experimental Physics Advisory Committee Meeting (EPAC) Schedule for the 12-13 June meeting here has a link to our presentation.
From Peter Schuler: Revised measurements chapter, with corrections (numbers in table and text) of June 5. [LaTeX source].
(There was a June 2, and a June 3 version, which this one supersedes).
Weekly meeting Wednesday June 4, 2003 at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
Weekly meeting May 28, 2003
The latest version of the proposal (with minor fixes to author list, TeXisms, dated May 25) is here [PDF, 1330 kB, 67 p.]
Weekly meeting May 21, 2003
To be discussed: - Presentation to EPAC in 3 weeks;
- From John Sheppard: List of hardware responsibilities: [MS Word, 1p.].
Sorry, this web site had not been updating from Friday, May 16, afternoon to Monday, May 19, afternoon [PDT].
Problem was due to move of web server; it is now fixed.
Proposal E-166-bis, as submitted on Friday, May 16, 2003 [PDF, 1722 kB, 67 p.] (TeX Sources are in this directory)
Latest (15-May-2003 ~10:27 am PDT) version of proposal, after Kirk's edit. [PDF, 1439 kB, 66 p.] (Apparently pdf is MS-Windows-made, so does not print everywhere easily; try printing in segments).
Next meeting May 14, 2003 at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
This is the last meeting before the (changed) deadline of May 16.
- Kirk T. McDonald, Draft Proposal Materials, here (Directory at puhep1.princeton)
- Peter Schuler, Materials resent May 12, 2003 including Draft Memo, The Positron Polarimeter for the SLAC FFTB Undulator Experiment, ps.gz [gzipped postscript, 718 kb]. [tex source, 26 kb]. (identical to that sent May 10, in directory below)
- Peter Schuler, Materials sent May 10, 2003 including Draft Memo, The Positron Polarimeter for the SLAC FFTB Undulator Experiment, [PS], TeX source and 12 .eps figures [Directory].
- Peter Schuler, Positron Transmission Polarimeter Layout No.4b, figure, [eps, 41 kB, 1 p.] (If ghostview or gv cuts off this picture when you display it, select Size (or BBox) 'A4' instead of (US)'letter', and all of it can be seen)
- AWW, Paragraph on DAQ [txt, 3 kB, 1 p.]
Next meeting May 7, 2003 at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
Also, during May 8-12, we plan to have many meetings to finalize the new Proposal.
Materials sent out around during the last few days:
- A Directory of recently discussed material is here;
- Peter Schuler,A Note comparing configurations examined by Ties, and a Radical Proposal: Layout No. 4 (shown in figure in next item) [ascii text, 9 kB]
- Peter Schuler, Positron Transmission Polarimeter Layout No.4, figure, [eps, 40 kB, 1 p.]
- Peter Schuler, B-field maps of the magnetized iron magnet in the new layout-4. Legend [ascii text, 2 kB]
1-d field map[eps, 761 kB]
2-d field map [eps, 1842 kB]
- Peter Schuler, POLGeant Simulation for the new layout-4, Legend [ascii text, 3 kB]
Figure [eps, 561 kB]
- Ties Behnke, Memorandum: Optimization of the E166 spectrometer, May 1, 2003 (beamline_e166_3.doc) [MS Word doc, 104 kB, 11 p.]
- Ties Behnke, Memorandum: Optimization of the E166 spectrometer, May 1, 2003 (beamline_e166_4.doc) contains work to study 'the new detector setup proposed by Peter combined with a beamline optimised to minimise the photon background.' [MS Word doc, 66 kB, 6 p.]
- Rainer's version of Peter's 60x60 spectrometer layout, in various formats(4/29):
[pdf, 122 kB] ; [eps, 320 kB] ; [ai, 139 kB] ; [eps, 188 kB] ;(...acr.eps version).
- US LC Steering Group USLC Options - Scope Definition. April 30, 2003; [pdf, 66 kB, 3p.] ;
this document has a requirement for `an upgrade option for positron polarization.'
Weekly meeting April 30, 2003
Materials sent out around during the last few days:
- Yuri Batygin, Transmission and polarization of positrons in 60 deg + 60 deg beamline, as proposed by Ties Behnke on 4/25,, April 29, 2003 [MS Word doc, 79 kB, 5p.]
- Ties Behnke, Memorandum: Optimization of the E166 spectrometer, April 25, 2003 [MS Word doc, 91 kB, p.]
- J. Sheppard, Second Draft of a Run Plan,April 29, 2003 [pdf, 656 kB, 7 p.] ; [TeX source, 25 kB, ]
- J. Sheppard, First Draft of a Run Plan,(Work in Progress, April 28, 2003; Obsoleted by above) [pdf, 147 kB, p.]
Weekly meeting of April 23, 2003 at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
- Materials for today's meeting are here [Directory]
- Yuri Batygin, Transmission and polarization of positrons in 20 deg magnet and focusing coil, April 22, 2003 here [pdf, 54 kB, p.]
- Yuri Batygin, Positron tracking in 90 deg beamline proposed by K. McDonald on 4/22/2003, April 22, 2003 here [pdf, 325 kB, p.]
- Ties Behnke, Memorandum: the E166 positron spectrometer, update, April 22, 2003 here [doc, 42 kB, p.]
- Kirk T. McDonald, Draft Proposal Materials, here (Directory)
- Kirk T. McDonald, Draft Proposal (e166prop03), here [pdf], here [tex source]
A memo by Kirk T. McDonald, A Combined-Function Magnet for the SLAC E-166 Positron Polarimeter, here [pdf, 241kB, 10p] (at Princeton U.) or here here (SLAC Mirror)
Some items recently received/sent around:
- Yuri Batygin, Coil and Collimator for E-166, April 15, 2003 here [pdf, 58 kB, 3p.]
- Ties Behnke, Memorandum: The E166 positron spectrometer, April 11, here [pdf, 58 kB, 9p.] (includes Geant3 simulation of beamline between photon target and iron analyzer block, for default beam line and one with larger transverse offset)
- Figures: (derived from original [big]tiff drawing file with 300 dpi, R.P., Apr. 14, 2003)
  - Elevation View (showing magnets etc in relevant area) here [jpg, 251 kB, 1p.]
  - Same, in pdf: here [pdf, 374 kB, 1p.]
  - Top view of positron spectrometer, by Rainer Pitthan: here [jpg, 177 kB, 1p.]
  - Undulator picture, in eps (April 22, 2003): here [eps, 468 kB, 1p.]
  - Top View of Table, April 18, 2003: here [pdf, 123 kB, 1p.]
- TeX source for Section 2 of proposal here [tex ascii-text, 12 kB]
- An outline of a list of (mainly detector) pieces and devices, written to estimate install time requirements (A.W.W., April 11, 2003) here [ascii-text, 4 kB]
- New Proposal title page/author list (March 18, 2003): here [pdf, 12 kB]
Weekly meeting of April 16, 2003
(Access to webserver was down since last week, will update web site once available again.)
Next meeting April 9, 2003 at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
Agenda:
1. progress in proposal draft, if any
2. progress in simulations and calculations
3. progress in FFTB layout
4. how to measure the CsI output: diodes vs PMs
5. misc.
No meeting on April 2
Submitted by Yuri Batygin: A memo, Transmission and polarization of positrons in S-bend magnet (20 deg +20 deg), on a modified E-166 beamline with 2x20 deg magnets and distance between magnets L=8 cm to avoid direct irradiation of polarimeter by photon beam from the target here [pdf, 269 kB, 2p.] .
Weekly meeting of Wednesday, Mar. 26, 2003 at 9 :00 a.m. PST;
For discussion today, Kirk put some Items on his web site:
- softbends.pdf discusses use of soft bend magnets around the undulator;
- FFTB_Schedule.pdf John Sheppard's present understanding of the FFTB run schedule;
- e166_loading.eps Rainer Pitthan's plot of how E-166 use of 50-GeV beam would be operationally sound. => It appears that our formal request will be for 50.0 GeV beam.
Weekly meeting on Wednesday, Mar. 19, 2003 at 9 :00 a.m. PST;
The next EPAC meeting is expected to be June 12-13, so a new proposal needs to be turned in by May 15.
Main topic is Kirk's draft of the new Proposal, of which the slightly revised version can be found here [asci txt, 3, 2p.] Other materials for the proposal will eventually be available at Kirk's E-166 website here or here (Both point to same directory).
Gudrid Moortgat-Pick has also put up a web page for a planned paper, Beam Polarisation at a LC here, to which contributions are welcome.
Weekly meeting on Wednesday, Feb. 26, 2003 at 9:00 a.m. PST; at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316
The transparencies of a presentation by Peter Schuler at DESY last week (2/19/2003) can be found here as
[pdf, 2.9 MB, 23p.] or as
gzipped ps [ps.gz, 1.9 MB, 23 p.]. (Unzipping the latter will make a ~28MB PS file).
Note received: Simulations by Dr. Masafumi Fukuda:
Explanation[html, 2kB]
Figures[pdf, 116kB, 4p.]
Weekly meeting on Wednesday, Feb. 19, 2003 at 9:00 a.m. PST;
(John and Rainer will be at DESY for that meeting).(Apparently meeting curtailed by lack of phone connection)
Notes received:
- R.P.'s Figure of separation magnets ('Still missing the reversible iron.') here[pdf, 136kB, 1 p.])
- Kirk McDonald's Note on reflective coverings for aerogels: here[html, 5.3kB, 1 p.])
- Yuri Batygin, Transmission and polarization of positrons in S-bend magnet (20 deg + 20 deg), here[pdf, 5.6kB, 3 p.])
Weekly meeting on Wednesday, Feb. 12, 2003 at 9:00 a.m. PST;
Notes received:
- M. Fukuda, A. Ohashi, T. Hirose, M. Washio, I. Yamazaki, Y. Kurihara, T. Okugi, T. Omori, J. Urakawa, M. Nomura, I. Sakai, Production of a short-bunch polarized positron beam and design of a positron beam polarimeter, poster for Quantum Aspects of Beam Physics conference in Hiroshima, Jan. 7-11, 2003. (Gives result of the polarization measurement for backscattered Compton gamma-rays and design of the positron polarimeter. ) here[pdf, 738kB, 11 p.])
- M. Fukuda et al. Results of recent simulation (Figure of Setup, p.1; Energy of positrons after 3mm W target, p.2; Transmission and polarization of positrons after separation magnet here[pdf, 8kB, 3 p.])
- Yuri Batygin, Transmission and polarization of positrons in S-bend magnet, here[pdf, 628kB, 3 p.])
- Yuri Batygin, Transmission and polarization of positrons in S-bend magnet (20 deg + 20 deg), here[pdf, 1549 kB, 4 p.])
- Yuri Batygin, separation magnet (3.333 kGs), spectra and transmittance here[pdf, 8kB, 3 p.])
No weekly meeting on Wednesday, Feb. 5, 2003 at 9:00 a.m. PST for lack of phone-conference connections.
(Note on DAQ by A.W.W. txt[Ascii, 4kB]
Weekly meeting on Thursday, Jan. 30, 2003 at 9:00 a.m. PST; at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316, all as before.
To be discussed: - Update of Budget and who does what (Note: last year's budget proposal here[pdf, 62 kb]
Also, SLAC is just tuning the linac for SPPS. Rick Iverson made a screen shot (shown here[pdf, 150kB]) showing "...the present emittance at the end of the linac for the FFTB beam. The bunch is much shorter than what is needed for E-166 so we should be able to get the emittance smaller than this. This can be thought of as an upper limit of what we can do."[rhi]
Weekly meeting on Thursday, Jan. 23, 2003 at 9:00 a.m. PST; at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316, all as before.
(Comment from rp sent out with meeting invitation: In the last presentation to EPAC much was made of the difficulties to achieve the emittance we assumed.I am attaching the latest progression of a { plot [eps, 49 kB]}; which shows that nearly independent of the actual emittance we can get the beam small enough in the undulator without having it too big in the "insertion" quadrupoles. The reason is that the beta* used are a multiple of the undulator length. In other words we can go down with the beta* to match whatever emittance we get.)
Weekly meeting on Thursday, Jan. 16, 2003 at 9:00 a.m. PST; at SLAC, Bldg. 208. call-in number: 510-665-5437, Meeting ID: 3316, all as before.
(Sent before meeting: Gamma Cross section plot { here [pdf, 163 kB]}; it indicates that around 5 MeV nearly all of the gamma cross section is Compton, so inclusion of the spin dependency of the Compton into EGS is important! [Presumably, longitudinal spin transfer already included, and transverse in another version])
Happy New Year! Our first weekly meeting is now on Wednesday, Jan. 8, 2003, at 9:00 a.m. PST; at SLAC, Bldg. 208;
Weekly meeting: Wednesday, Dec. 18, 2002; 9:00 a.m. PST Bldg. 208 (not 280) Same call-in number: 510-665-5437, Meeting ID: 3316.
reading for meeting:Y.K.Batygin and J.C.Sheppard, Post-target beamline design for proposed FFTB experiment with polarized positrons, LCC-0110 PDF,17p; other LCC Notes Index (9 of the last 20 deal with positron production).
Weekly meeting: Wednesday, Dec. 11, 2002; 9:00 a.m. PST Bldg. 208 (not 280) Same call-in number: 510-665-5437, Meeting ID: 3316 (see Rainer's e-mail).
A schematic figure of beam passing through undulator shown by Rainer [ PDF 41 kB] (The undulator is shown schematically as the red bars from z = -0.5 to +0.5 m at y= +/- 430 micrometer).
Weekly meeting: Dec. 3, 2002; New Time: 9:00 a.m. PST Same call-in number: 510-665-5437, Meeting ID: 3316 (see Rainer's e-mail [to be sent out in a few minutes])
Weekly meeting: Nov. 26, 2002; 2:00 p.m. PST (Bldg 208 at SLAC) Call-in number: 510-665-5437, Meeting ID: 3316
The final version of Kirk McDonald's Presentation to the EPAC on Nov. 20 is here as [PDF, 24 p, 1.6MB]; or [ppt, 24 p, 2.25MB];
Our answer to questions of the EPAC is here as [PDF, 5p, 78kB]; or [MS Word, 5p, 42kB].
No weekly meeting on Nov. 19, 2002; last preparations for the EPAC Meeting; Kirk's presentation will be on Wednesday, 20 Nov., at 14:30 in the Research Office Building (Draft presentation can be found here [powerpoint, 2MB]; please review it.)
For reference, the proposal (as a living document, continually updated) is here [pdf, 1.26 MB].
Weekly meeting: Nov. 12, 2002; Call-in number: 510-665-5437, Meeting ID: 3316
(Changed at last minute, sorry)
The minutes of a meeting/brainstorming session on Cerenkov detectors we had on November 7 are here [7 kb]
Weekly meeting: Nov. 5, 2002; Call-in number: 510-665-5437, NEW Meeting ID: 3406
Agenda:
1. Institutional responsibilities (that includes budget)
2. Ideas about positron polarimetry, and
Critique of draft of talk to be given at the MAC meeting this Thursday.
Note also the (regular SLAC Lunch) seminar today by Michel Buen�rd, an expert in Cerenkov counters; he might meet us during the afternoon, too, to discuss our Cerenkov counters.
Note the upcoming
- MAC(Machine Advisory Committee) Meeting at SLAC, November 6-8 (J.C. Sheppard's presentation is on Thursday, Nov.9, at 9:00) and
- EPAC Meeting 20-21 November (E-166 presentation by Kirk McDonald scheduled for Wednesday, Nov. 20, 2:30 p.m).
Weekly meeting: October 29, 2002; , usual time (2 p.m. PDT), call-in number (1-510-665-5437, press 1, enter 0653#), place: EFD Conference Room (the old Babar Room) 180 in Bldg. 280.
From Rainer Pitthan: Agenda [ascii,1 p, 2 kB].
From John Sheppard: EGS-Pol distribution of photons, for 10MeV polarized positrons on a 0.5 mm tungsten target, (yellow histogram: photon energy, [blue line following it: ~1/E as in bremsstrahlung], blue wiggly rising line: polarization from EGS, smooth black rising line: polarization from Olsen and Maximon formula;) eps [14 kb] or as jpg [85 kB]
For reference: We'll keep the latest version of the Proposal (with post-submission corrections) here [PDF, 1.23MB]
No weekly meeting on October 22,2002 (all busy with proposal-writing).
Weekly meeting: October 15, 2002; , same time (2 p.m. PDT), call-in number (1-510-665-5437, press 1, enter 0653#), place: EFD Conference Room (the old Babar Room) 180 in Bldg. 280.
- Latest version of Proposal from Rainer Pitthan can be found in the PDFs directory
- Mike Wood's text on Beam Feedbacks MS Word (2p, 27kB), pdf (2p, 93 kB)
- Yuri Batygin, Transmission and polarization of the beam in 20 deg bend + 3 m solenoid (beam optics after target with (without) flux concentrator; 20 deg bend magnet and 3 m solenoid with 0.5 Tesla. Positron transmission is 77% (42%), polarization is 47% (42%)) MS Word ( 5p., 95 kB) PS ( 5p., 250 kB)
Posted note by Alexander A. Mikhailichenko, Pulsed Helical Undulator for Test at SLAC - The Polarized Positron Production Scheme - Basic Description, CBN 02-10, Sept. 16, 2002; [PDF,18 p, 1.5MB].
Weekly meeting: October 8, 2002; same time (2 p.m. PDT), call-in number (1-510-665-5437, press 1, enter 0653#), place: EFD Conference Room (the old Babar Room) 180 in Bldg. 280.
Topics to discuss:
- A background measurement with a few hours of FFTB time in January? What to measure and with which device?
- The LoI: (Your contribution is needed very soon)
  The latest (Oct.6) draft of the LoI/Proposal is here in pdf (23p., 804 kB).
  There is a tight schedule:
  - Proposal submission: 2 weeks --> Monday Oct. 21
  - NLC MAC: 4 weeks --> Wed-Fri Nov. 6-8
  - EPAC Meeting: 6 weeks --> Wed-Thu Nov. 20-21 (tentative).
- Possible Detector Layout pictures from Kirk McDonald pdf (163kB, 1p.), described as follows:
  The middle figure is a scheme that could include Moller polarimetry for positrons.
  The lower figure is a scheme based on the Japanese idea to reconvert the positrons and do transmission polarimetry.
  The top figure sketches how a "dogleg" magnet might be built very simply.
- Detector Layout picture from Ken: eps (75kB), jpg (110kB).
- Yuri Batygin, Acceptance of 90 deg bending magnet MS Word ( 3p., 48 kB) PS ( 3p., 137 kB)
Beginning October 8, the weekly meetings are held in the EFD Conference Room, room 180 in Bldg. 280. Call-in Number as below.
Weekly meeting: October 1, 2002; Note the
new time, 2 p.m. PDT, and
new call-in number: 1-510-665-5437, press 1, enter 0653#)
This time only: in the Orange Room.
- J. Sheppard, Production of Polarized Positrons in the FFTB, one-page summary draft (to be revised after comments received at meeting) pdf ( 1p. 63 kB).
- Yuri Batygin, Transmission of Positrons through 90 deg bend + 3 m Solenoid, MS Word ( 2p., 33 kB) PS ( 2p., 50 kB)
- Beamline Map of FFTB (dated 11 September 2001, SLAC-I-040-20200-001-R006) pdf ( 1p. 126 kB). or (slac-internal only) pdf (8 p, 126 kB)
(October 1, 2002) Time and call-in number for weekly metings at SLAC changed:
every Tuesday at 2 p.m. PDT in the Group A Conference Room ( Central Lab Annex Bldg 84 Rm. B188).
The new call-in number is: 1-510-665-5437, press 1, enter 0653# follow the instructions to attend.
Weekly meeting: September 24, 2002; (same time, 3 p.m. PDT, and place, CLA B188, and call-in number, 1-510-647-3480, press 1, enter 216434#)
- J. Sheppard, How long is the NLC Helical Undulator? Rev. 1 pdf ( 4p. 353 kB). pdf ( 4p. 293 kB).
- Yuri Batygin, Start-to-end Simulation of positron collection from 10.7 MeV gammas (cut spectrum), MS Word ( 6p., 104 kB) PDF ( 6p., 59 kB)
Added 'Depolarization in Matter, Polarization Transport in Matter Codes' Section in References page
Weekly meeting: September 17, 2002; (same time, 3 p.m. PDT, and place, CLA B188, and call-in number, 1-510-647-3480, press 1, enter 216434#)
- M. Woods, EPAC Meeting Schedule;
- J. Sheppard, Undulator Period, Depolarization Estimate, Undulator collimation;
  A Test in the FFTB of Undulator-Based Positron Sources, pdf ( 6p. 541 kB).
- M. Woods, Rates and Total Energy/Pulse for Helical Undulator Gammas and Production Positrons, pdf ( 3p. 81 kB).
- Yuri Batygin's Transmission of positrons through 40deg bend magnets, Memo, MS Word ( 3p.50 kB) ps ( 3p. 69 kB).
Weekly meeting: September 10, 2002; (same time, 3 p.m. PDT, and place, CLA B188, and call-in number, 1-510-647-3480, press 1, enter 216434#)
- Mike Wood's continued Gamma Polarimeter Studies pdf (7 p, 150kB)
The latest version of the LoI can be found in this directory (e.g. LOIv9.pdf, 21 p, 810 kB),
(September 6, 2002) The Sub-Proposal/EoI to the LCRD Group together with others will be reviewed on Monday, 9 September. as per Dante Amidei's email message ( ascii txt, 8 kB)
(September 4, 2002 ) The website has been reorganized, with most documents moved to the http://www-project.slac.stanford.edu/lc/ webserver.
But keep the bookmark of the frames page you now get by default (at http://www.slac.stanford.edu/~achim/positrons/index.html. (If some page isn't found, you may try Edit -> Preferences -> Advanced -> Cache -> Clear Disk Cache, then Reload.)
(September 3, 2002)
Some of us submitted a Sub-Proposal/EoI to the LCRD Group, which can be found here in MS Word, ( 5p.52 kB)
or in pdf (5p., 21kB)
Weekly meeting: September 3, 2002; same time and place and call-in number (1-510-647-3480, press 1, enter 216434#)
On the agenda:
- the ' LOI and what needs to be done to make it a success.' Latest draft (v9, updated 13:27 PDT 9/03/2002) of the LOI is here as pdf (21 p,791 kB), (This is the LoI to be submitted to the SLAC PAC).
- Yuri Batygin's continuing study of Polarization and transmission of positrons in Cornell-type flux concentrator + 2 bending magnets, Memo, MS Word ( 4p.51 kB) pdf ( 4p.28 kB)
- Mike Wood's Gamma Polarimeter Studies pdf (4 p,95kB)
(01-Sep-2002) Happy Labor Day! Bill Bugg's Version of the LoI/Sub-Proposal for the LCRD group has been updated.
Please find here the newest version, (updated 9/03 Tuesday 16:56 PDT) in MS Word ( 5p.52 kB)
or the same in pdf (5p., 21kB)
and the listing of changes in ascii text
Please comment as soon as possible; I intend to send it in to George Gollin on Tuesday 03 September 2002 (the deadline!)
We will have our weekly meeting on August 27, 2002 at SLAC, Central Lab Annex, Group A Conference Room, at 3 p.m. PDT.
To call in, dial 1-510-647-3480, press 1, enter 216434# and follow the instructions to attend.
For this meeting the following materials were submitted:
- Yuri Batygin's memo, Polarized positrons for test experiment, 12 pp.,PDF, 110 kB (Updated version of 8/28/02). [Transmission efficiency, ave. polarization of positrons through an S-bend, with and without flux concentrator]
- Mike Wood's S-bend energy spectrum 3 pp., PDF, 89 kB [Energy, polarization spectra after drift and S-bend] and text 1p., ascii, 2 kB
- Ken Moffeit's figure of the geometry for transmission gamma polarimetry 1 pp., PDF, 54 kB [with Propane/Isobutane/Aerogel moveable Cerenkov counter]
- Rainer Pitthans update of Proposal, (version 5) 11pp.,PDF, 66 kB
- An update by Bill Bugg of the EoI to the LCRD group/DOE 6 pp.,PDF, 20 kB
(August 14,2002)
- Materials sent out yesterday and today have been posted on the Minutes/Notes page(below)
A second informal meeting was held on August 13, 2002 at SLAC. Below please find some materials shown or discussed by the participants. or prepared in response to requests at that meeting.
- Keith Moffet's schematic figures of outlay of experiment GammaDetectors [PDF, 3p, 116kB], and
- Mike Wood's comments on the integrating measurement for gamma polarization [ASCII Text, 4.5kB]
- John Sheppard, Undulator and Synchrotron Radiation in the FFTB Experiment, rev.1 8/13/02, [PDF,4p, 387kB], it has a table of various beam and radiation-related parameters.
- Items submitted after meeting follow:
- John Sheppard's plots of photon number and polarization spectra. [PDF,2 p, 169kB],
- After the meeting, Rainer Pitthan prepared this 'Skeleton LoI draft' [PDF, 8p, 43kB],
- Roger Carr's Formula/example for Bifilar helix, as (1 p. of) [PS, 30kB] or [MS Word, 24kB].
We have meetings every Tuesday at 3 p.m. [PDT] in the Group A Conference Room ( Central Lab Annex Bldg 84 Rm. B188). To call in, dial 1-510-647-3480, press 1, enter 216434# and follow the instructions to attend.
(preceding August 5, 2002) To start out on the polarimetry part of this project, some of us have submitted an Expression of Interest to the Linear Collider Research and Development Working Group which can be found

here [pdf, 19 kB]

here [MS Word, 48 kB]

here [PDF, ~19 kB]

here [MS Word, ~48 kB]

welcome!

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Internal Notes

More formal internal notes will appear here (once written).
See above for notes/short memos discussed at the weekly meetings.

Vahagn Gharibyan, K. Peter Schuler, The MeV Gamma Compton Polarimeter for the SLAC FFTB Undulator Test, October 2002; [PDF, 16 p, 0.6MB],
Alexander A. Mikhailichenko, Pulsed Helical Undulator for Test at SLAC - The Polarized Positron Production Scheme - Basic Description, CBN 02-10, September 16, 2002;
[PDF, 18 p, 1.5MB],
See the LCC-Notes section of the references web page for published (LCC Technical LCC or Cornell CBN) notes.

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(PDT or GMT-8h) by Achim W. Weidemann.

For comments or questions on this page, or this project, please send e-mail to: achimNOSPAM@SLAC.Stanford.EDU(remove NOSPAM)

Mailing Lists, Milestones, Data, Safety Meeting Minutes . Internal Notes .(see separate page)

Mailing Lists, Milestones, Data, Safety

News, Minutes or Notes for Meetings

Internal Notes

Mailing Lists, Milestones, Data, Safety

Meeting Minutes .

Internal Notes .(see separate page)