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TOPIC |
PROJECT/ TASK |
1. Luminosity (for Detector &
Physics) |
1.1 Bhabha luminosity measurement:
Detector requirements for 40-120 mrad polar angle |
2. Luminosity (for Accelerator)
& IP Collision diagnostics
(spotsizes, collision offsets,
tilts, luminosity) |
2.1 Luminosity (fast diagnostic)
2.1.1 Pair detectors
2.1.2 Radiative Bhabha detector?
2.1.3 Deflection scans
2.2 Spotsizes
2.2.1 Deflection scans
2.2.2 Shintake monitor?
2.2.3 Pair detectors
2.2.4 Beamstrahlung detectors?
2.3 Collision offsets
2.3.1 Deflection scans
2.3.2 Pair detectors
2.3.3 Beamsstrahlung detectors
2.4 Tilt between colliding beams
2.4.1 Pair detectors
2.4.2 Beamsstrahlung detectors
2.5 IP Collision Feedbacks.
2.5.1 IP BPMs and
FONT/FEATHER feedbacks.
2.5.2 Angle feedback
considerations
2.5.3 use of fast
Luminosity measurement
2.6 BEAMCAL tracker/calorimeter at 5-40 mrad. Design criteria include:
i) ability to resolve 200 GeV electron in
presence of pair and hadron backgrounds
ii) radiation hard to 100Mrad/year
iii) prompt signal for possible use in
IP beam-beam steering feedback
iv) angular distributions
of pairs can be used to infer beam parameters
2.6.1
Effect of solenoid and crossing angle on ability to infer beam
parameters
2.6.2 Evaluate
different detector technologies: 3-d Si, planar Si, diamond,
crystals, other?
2.7 Beamstrahlung Detectors
2.7.1 Visible beamstrahlung detector from 1-2mrad: extraction line design for this
2.7.2 Pin-Hole camera for high energy
photons
2.7.3 Ionization detector in front of
photon beam dump? use angular distributions to
infer beam parameters
2.8
Vertex detector for measuring pair angular distribution to infer beam parameters |
3. Luminosity
Spectrum |
3.1 Beam energy spread
effects on lum-wted ECM determination.
3.2 Bhabha
acolinearity analysis, systematic effects of beamsstrahlhung,
disruption
angles, ISR
3.3 Bhabha energy
measurements useful?
3.4 Physics analyses to study sensitivity to beamstrahlung,
energy spread and L(E)
determination
3.4.1 Slepton masses
3.4.2
Higgs mass
3.4.3
top mass
3.4.4 new narrow resonance (ex. KK resonance)
3.4.5 Giga-Z
3.4.6 W mass
3.5 Cradle-to-grave lumi spectrum analysis,
including realistic machine performance:
wakefields,
beam parameter correlations, beam feedback performance, jitter,
aberrations
3.6 Forward tracker and calorimeter requirements in region 100-400 mrad for
Bhabha acolinearity analysis
(and also 40-100 mrad
if can use Bhabha energies)
3.7 Reducing ECM bias
related to beam energy spread?
|
3.7.1 reducing energy spread |
|
3.7.2 reducing energy-z correlation |
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3.7.3 reducing kink instability |
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4. Energy |
4.1 Document relevant beam
parameters (energy jitter, energy variation over train, ...)
4.2 Determine Energy spectrometer requirements (resolution, relative and absolute
precision: per bunch, per train, per second, per minute)
4.3 BPM Spectrometer
4.3.1
Design into the lattice upstream of IP
4.3.2
Evaluate SR energy loss between spectrometer and IP; evaluate energy fluctuations
due to orbit variations
4.3.3
Document expected performance, R&D needed
4.4 Synchrotron Stripe Spectrometer
4.4.1
Design into the lattice downstream of IP
4.4.2
Evaluate SR energy loss between spectrometer and IP; evaluate energy fluctuations
due to orbit variations
4.4.3
Document expected performance, R&D needed
4.5 Energy spectrometer utilizing spin precession?
4.6 Other beam instrumentation to track relative Energy to 100ppm
level
4.6 Physics analyses to
determine lum-wted Energy, L(E)
4.6.1 radiative return to Z events
4.6.2
W-pair events, using W-mass |
|
|
5. Energy Spread |
5.1 Synchrotron stripe spectrometer in extraction line
5.2 Wire scanner at
extraction line chicane
5.3 laser wire at
extraction line chicane
5.4 Measurements upstream of IP
with wire/laser scanners |
|
6. Polarization |
6.1 Upstream polarimeter
| 6.1.1
Compton laser system |
| 6.1.2
Baseline polarimeter system |
| 6.1.3
Background estimates |
|
|
6.1.4 Optical cavity at Compton IP? |
6.2 Downstream polarimeter
(in extraction line)
| 6.2.1
Compton laser system |
| 6.2.2
Baseline polarimeter system |
| 6.2.3
Background estimates |
|
|
6.2.4 Pair spectrometer for Compton gamma measurements |
|
6.2.5 Measure angular distribution of beam at Compton IP |
|
6.2.6 BPM measurements of beam orbit in extraction line just
upstream of Polarimeter chicane |
| 6.3 Spin transport effects |
|
6.3.1 Difference between polarimeter measurements and lum-wted
polarization |
|
6.3.2 Vertical steering due to crossing angle-solenoid
misalignments + compensation |
| 6.4 Compton Detector studies |
|
6.4.1 Quartz Fiber Detector capabilities for
Compton electrons and Compton gammas |
| 6.5 Physics analyses for polarimetry |
|
6.5.1 W-pairs |
|
6.5.2 Blondel technique with both beams polarized |
|
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7. 2-Photon Veto; SUSY |
7.1 See item 2.6 above
7.2 Detector hermeticity |
|
8. Crossing Angle |
8.1 Crossing Angle Impact on Beam
Instrumentation |
|
9. EMI Effects |
9.1 Test of SLD's VXD3 and R20 module in ESA?
9.2 Test antenna pickups in FFTB?
9.3 Modeling calculations
9.4 Test simple geometry and compare to calculations? |
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10. Beam Halo |
10.1 Mini-TPC? |
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11. Giga-Z |
11.1 Evaluate machine parameters: reduced energy spread? reduced beamsstrahlung?
11.2 Evaluate energy and polarization instrumentation
11.2.1 Compton edge not as separated from primary beam energy
11.2.2 Beamsstrahlung is much
reduced |
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12. e-e- |
12.1 Evaluate machine parameters and instrumentation issues |
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13. g-g |
13.1 Evaluate machine parameters and instrumentation issues |
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14. 1 TeV
Upgrade |
14.1 Evaluate Beam Instrumentation capabilities and issues |
|
15. ILC
Parameters |
15.1 Evaluate impact of other ILC Parameters being considered |
|
16. Beam Test
Facilities |
16.1 SLAC ESA
16.2 KEK ATF |