CALORIMETER SOFTWARE MEETINGS
back to: EMC
The calorimeter software meetings take place on Wednesdays, biweekly
at 9 a.m. (5 p.m. UK, 6 p.m. Central Europe) in the SLAC-2 video conference
room (P&E builing 280). If you wish to be connected by phone call the
STS conference center at +1-973-321-2000. If you have a touch-tone telephone,
you may then connect directly to the teleconference by dialing passcode
107969 followed by the "number sign" ("#") key. Otherwise, you may request
the "EMC software meeting moderated by Helmut Marsiske" or the conference
with the passcode mentioned above when you are connected to the conference
Standing agenda items are:
Status of bbsim
Status of calibration
Status of reconstruction
19. August 98 :
2. September 98 :
16. September 98 :
Thorsten reported on a broadening of the energy distribution of electrons
when changing from bbsim rel 6.0.2 to rel 6.7.5 --&&&&&&>
the only major change between the two releases was the introduction of
the full source calibration system model - Thorsten will look into this
information from EMC: a proposal (Roland Waldi) --&&&&&&>
Roland will implement it and compare it to the standard method
on progress using the swimmer for cosmics (James Weatherall)
Helmut Schmuecker reported on a study of the influence of the method of
determing the cluster angle (cog, log, NNO) on cluster splitting for photons
30. September 98 :
Helmut reported that the broadening of the electron energy distribution
that Thorsten found (see last meeting) has its reason in a bug in the dirc
geometry description. Unfortunately the faulty gndirc has been used in
Helmut Schmuecker reported on his studies on cluster splitting. plots
14. October 98 :
Helmut reported that the bug-free version of the DIRC geometry will
not be in a release before 7.3.2. If you want to use it in releases before
check out gndirc V00-06-00.
Ralph reported that Vladimir created an EmcOepSequences package which
will include the Emc sequences to build an OEP executable. They were succesfull
in including the Bhabha calibration accumulation sequence. Also Christos'
and Mike's online montoring works.
Martin's lightpulser code worked in the OEP too but had problems with
the database. He is also working on finding a bug in his fitting algorithm.
Steve's work on prescaling Bhabhas is almost finshed.
Naveen released a new version of EmcSim removing a bug that was caused
by a CLHEP matrix change in inverting the matrix in the full waveform simulation.
Jim will contact Dave Brown to get more information about the swimmer.
The swimmer does the updating of the track parameters right but has problems
when intersecting between volumes.
John reported on finding and removing memory leaks in reco code.
Ralph said that in the next release (7.4.0) the status and the Bhabha
calibration constants will be loaded automatically in the database and
will be filled with initial values. Jim will discuss with Stephen G. where
the best place is to put them in for reconstruction.
28. October 98 :
11. November 98 :
Track match running times (John Back) UK
link - running track match with single 500 MeV pion events with x10
background Frame files in 6.10.10.
Thorsten made the proposal to reduce the number of lists of candidates
on which EmcIdentify is run from 3 (charged, neutral and charged-neutral)
to 2 (charged and neutral), because the average time needed by EmcIdentify
(10s/event single pion tracks !). This started a long discussion about
speed and optimization of the reconstruction software, if it is necessary
to do it soon and so on. We need to continue this discussion.
25. November 98 :
bbsim was reorganized, the .cc files were moved to a package EmcSimGeom
digi calibration - machinery is in place (Jim)
We had a longer discussion about the lists that come out of the reconstruction
to the user in Beta. The main questions were how many lists we need and
if there should be overlapps allowed between the different lists. The current
design allows overlapp and the user needs to check for it.
studies (Jane Tinslay)
Bhabha event selection: plots
of the plots (Steve McMahon)
Michael George is working on a event display for the Emc. See his homepage
for some first examples. More on displays - see Emc software page.
In a short time plots will be available on the web that show the radiation
length spent in front of the calorimeter for every angle.
WE HAVE THE FIRST DATA ! Yesterday the first crate could be read out. (10
ROMs). The data can be found here.
They can be read with the PlayData program from the EmcOepSequences package.
See the comments there, but you probably have to check out the head of
it from the repo.
9. December 98 :
bbsim: Now there is the possibility to misalign the EMC. (Helmut)
When two (TrkReco-)Tracks match the same EmcBump ... 4 pictures
such cases produced with "GraDisplay" (Thorsten Brandt)
- the different cases need further investigation.
the pi0 and K0s to pi0pi0 case (Christos Touramanis)
6. January 99:
20. January 99:
3. February 99:
17. February 99:
cancelled due to collaboration meeting
3. March 99 :
some remarks about cluster splitting & the effect on E/p , Slide1
some comments on fitting & handling of PDF's;
summary of talk from last PID - workshop .ps
17. March 99 :
Cluster studies - a look at photon energy resolution as a function of backgrounds
and the cluster algorithm parameters by Michael
Plots for single particle photon efficiency study using five different
methods: Second Moment, Lat/Size, R (see PID workshop), Fisher discriminant
and Neural Network:
dist. for K0L and Anti-Neutron (dotted line samples selected for NN, Flat),
dist. for NN training, Dist.
for working out R function, Dist.
for shower shape variables, A00 and A42, R
and NN output, using
R for photon eff. and K0l+Anti-neutron miss_id, and using
NN for photon eff. and K0l+Anti-neutron miss_id, Summary
Table of Efficiencies for the five Methods. (Thorsten Brandt, Akram
Status report Emc global alignment - Data
and MC plots. (Urs
31. March 99 :
14. April 99 :
- Helmut presented the top ten list of time consuming Emc modules, work is ongoing to make them faster
28. April 99 :
cancelled due to software week
12. May 99 :
26. May 99 :
09. Jun 99 :
21. Jul 99 :
Created: Sept 7 1998 Last modified: Jul 21 1999