kek beam test koji yoshimura kek mice collaboration meeting 2004.10.28 koji yoshimura kek mice...
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KEK
Beam Test
KEK
Beam Test
Koji YOSHIMURA KEK
MICE Collaboration Meeting2004.10.28
Koji YOSHIMURA KEK
MICE Collaboration Meeting2004.10.28
Review and updated informationTBD Items
Tracker ConfigurationPlane interval
Compatible Phase 2.5???Beamline Layout
Trigger Mechanical (base, rotator, etc.)
PIDTOF (Atsushi Horikoshi)Aerogel
Software (Katsuya Yonehara)
Review and updated informationTBD Items
Tracker ConfigurationPlane interval
Compatible Phase 2.5???Beamline Layout
Trigger Mechanical (base, rotator, etc.)
PIDTOF (Atsushi Horikoshi)Aerogel
Software (Katsuya Yonehara)
Contents
Contents
Perfomance check to finalize design
Light yield, Efficiency, NoisePattern RecognitionMomentum measurementCalibration (alignment)
Mesurement Emittanceprove to determine by 0.1% accuracy
Perfomance check to finalize design
Light yield, Efficiency, NoisePattern RecognitionMomentum measurementCalibration (alignment)
Mesurement Emittanceprove to determine by 0.1% accuracy
Objective
Objective
S-JACEE
Magnet
S-JACEE
Magnet
B=1TB=1T
1 week life1 week lifeBeamBeam
B=1TB=1T
π2
Beamline
π2
Beamline
Slow extracted2 sec Flat top10 mm R.M.S
Yield of Pion10^5 10^5 @ 1 GeV/c10^3 @ 0.4 GeV/c
Slow extracted2 sec Flat top10 mm R.M.S
Yield of Pion10^5 10^5 @ 1 GeV/c10^3 @ 0.4 GeV/c
BEAM
Condition
BEAM
Condition
Two Beam Periods 2005 May 1week 2005 Jul 1week
Two Beam Periods 2005 May 1week 2005 Jul 1week
Longer than BESS MagBottle-neck shaped bore
restrict acceptance
Longer than BESS MagBottle-neck shaped bore
restrict acceptance
Jacee
Magnet
Jacee
Magnet
Stray Field
Stray Field
Basic performance checkConfirmation of cosmic-ray run with new VLPC cryostat
light yieldcomparison of fiber concentrationVLPC vs PMTMinimum ionizing - Defocus beam
position resolution (Alignment error)Minimum ionizing - Defocus beamInclined beam (detector be tilted)
multiple scattering - material thicknessmomentum/angle dependence various momentum
Basic performance checkConfirmation of cosmic-ray run with new VLPC cryostat
light yieldcomparison of fiber concentrationVLPC vs PMTMinimum ionizing - Defocus beam
position resolution (Alignment error)Minimum ionizing - Defocus beamInclined beam (detector be tilted)
multiple scattering - material thicknessmomentum/angle dependence various momentum
1st Phase
1st Phase
High intensity beamHigh intensity beam
1st Phase beam
1st Phase beam
1st Phase Trigger
1st Phase Trigger
Plane spacing?
Plane spacing?
Curvature resolution Curvature resolution
Spiral Angle Spiral Angle
41degree for 1T 1m41degree for 1T 1m
Field UniformityField Uniformity
L=96cm w/ MSL=96cm w/ MS
Pt distribution vs L
Pt distribution vs L
L=72cm w/ MSL=72cm w/ MS L=48cm w/ MSL=48cm w/ MS
L=96cm w/o MSL=96cm w/o MS L=72cm w/o MSL=72cm w/o MS L=48cm w/o MSL=48cm w/o MS
Precision Measurement w/ magnetic fieldTrack finding/Pattern recognition
relatively low p beam (0.3 ~ 0.6 GeV/c)Inclined beamGenerate Pt using degrader/diffuser
Momentum resolutionEvaluated with 4 identical station External Momentum measurement
TOF hodoscope?Lpath = 12 m, σTOF=50psdp/p = 1%?Better if PID is available
Position calibration during DAQ w/B field
Precision Measurement w/ magnetic fieldTrack finding/Pattern recognition
relatively low p beam (0.3 ~ 0.6 GeV/c)Inclined beamGenerate Pt using degrader/diffuser
Momentum resolutionEvaluated with 4 identical station External Momentum measurement
TOF hodoscope?Lpath = 12 m, σTOF=50psdp/p = 1%?Better if PID is available
Position calibration during DAQ w/B field
2nd Phase
2nd Phase
Good quality Low p beam?Good quality Low p beam?
2nd Phase
Beam
2nd Phase
Beam
2nd Phase Trigger
2nd Phase Trigger
2nd Phase
2nd Phase
Momentum by TOF
Momentum by TOF
muonmuon
pionpion
Requirement of high timing resolution to PID
PID of μ/π@ sigma=50ps
・ ~700MeV/c PID>3σ
( >99.7% )
To reject π σ<50ps needed
Atushi Horikoshi
Simulation of TOF
Timing resolution of shorter light guide is better
・ Evaluation of timing resolution to the length of light guide
・ Scintillator n=1.58
・ Light guide n=1.52
・ Fine mesh PMT (R6504S)
2.5” Finemesh PMTcould be borrowed from BESS Group?20 PMT’s for TOF, 16 PMT’s for Aerogel
2.5” Finemesh PMTcould be borrowed from BESS Group?20 PMT’s for TOF, 16 PMT’s for Aerogel
Possible
Detectors
Possible
Detectors
5x5 hodoscope5x5 hodoscope
Aerogel N=1.034 Pthd
403 MeV/c for mu530 MeV/c for pi
to be used for electronpossibly some fraction of pi
Aerogel N=1.034 Pthd
403 MeV/c for mu530 MeV/c for pi
to be used for electronpossibly some fraction of pi
PID?
PID?
Scenario should be confirmed.Tracker configurationBeam line detectorsMechanical issuesVLPCElectronicsDAQ
Scenario should be confirmed.Tracker configurationBeam line detectorsMechanical issuesVLPCElectronicsDAQ
Summary
Summary