kek beam test koji yoshimura kek mice collaboration meeting 2004.10.28 koji yoshimura kek mice...

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