j-parc e16 実験のための gem tracker 開発
DESCRIPTION
J-PARC E16 実験のための GEM Tracker 開発. 渡辺陽介 for E16 collaboration. 東大、理化学研究所 共同研究 KEK 測定器開発室のサポート. Outline. ① GEM Tracker の開発目的 ② GEM chamber のセットアップ ③ビームテスト結果 ④まとめ. GEM Tracker の開発目的. 1 セクター これが 26 個. 原子核中での φ 中間子質量の測定 φ->e + +e - 3 層の GEM チェンバーで磁場中の位置を出し運動量を決める 要求性能 ~ 100 μ m の分解能 - PowerPoint PPT PresentationTRANSCRIPT
J-PARC E16GEM Tracker
for E16 collaborationJ-PARC E16GEM Tracker1KEKOutlineGEM TrackerGEM chamber2GEM Tracker
126GEM Tracker->e++e-3GEM~100m (5kHz/mm2)(1~0.1% )
3GEM Chamber
. Beam induced electron - - -GEM geometryXPIXCuDXDXPIXCuD70~9050457550XD7050701002double-side
width70m 290mpitch:350m - gas: P10 or Ar70% CO230%
single-side350m700m700m4KEK4
GEMGEMCERNGEMXCuXPIDXPIXCuD70~9050457550NEW etchingOLD etching
54/370 D50 GEMP10, 55FeHit position determined by GEM chamberHit position determined by Silicon Strip Detector(SSD)
X1X4X3X2Q2Q3Q4Q1Q5X5Center Of Gravity SSDSSDGEM
Eventsdifference mm-Multiple scattering -Tracking Accuracybeam66GEMgasdD mm(XPI70, XCu90, D50) 3Single-side 700P1011mm0,15(X70,D100)+(X70,D50)3mm0,15,30,45(XPI45, XCu75, D50) 3Double-side 7006mm0,15,30,453mm0,15,30,45ArCO23.5mm0,15,30,4511mm0,15,30,45Double-side 3501mm0,15,303mm0,15,306mm0,15,30
7 11mm 500V/cm100umP10015106m470mGEM 3 (gain ~2000)single-side 700m8Et: 1700V/cmEi: 1700V/cm 3mm 1500V/cmsingle-side 700m01530160m270m470m~3 (Collection Effiiciency 0.15)collection efficiency (Egem/Ed,Geometry)GEM150m100m340V285V(/50 m)50mGEMOK9Et: 3400V/cmEi: 3400V/cmP10100m+50m (gain ~6000)Raytech GEMArCO2P10Double-side 700mDouble-side 350m1mm3mm6mm11mmDrift gapXX10P10Et: 3400V/cmEi: 3400V/cmArCO2Et: 3800V/cmEi: 3800V/cm
preliminary
preliminary dD=6mm(V/cm)(m)GEMP10 700pitchArCO2 350pitchP10 700pitchdD=6mm15(V/cm)(m)GEM -P10:340V -ArCO2: 380VP10GEM 3Tracking resolution : ~50m11
30150(m) mmArCO2, double-side 350m pitch() - 0-30100m200m15200mADC30100mpreliminary12dD700P103~4137ArCO23.5~2105350P106~7116ArCO26~487
T(m/cm^(1/2)(V/cm)P10ArCO2MAGBOLTZ simulation ArCO2: ~20000 P10 ~10000ArCO2-?ArCO2preliminary13760Torr Qi/QXihit700m350mMAGBOLTZP10610m630m~600mArCO2380m350m~240m P10MAGBOLTZ ArCO2Simulation-
mmpreliminarypreliminary14Double-side
/9single-side415KEKDouble side dDEfficiency700P10375%240m1198%154mArCO2389%154m350ArCO2386%124m1197%110mpreliminaryEfficiencyEfficiency,16
preliminary() ArCO2 double-side 700m dD=11mmED=500V/cm 15
Thalfsignal2xxxxvd x ThalfXtimingvd=1.3cm/secMagboltzconsistent1ch=10nsec17ADCResidual Residual
preliminary1ch=4mV 15100m
30
18Backups1920 200mV/pC(KEK psBelle)10VME v7923.2V/pCRPV-160 Flash ADC
(mm)mm
COG2122Magboltz Simulation
P10Ar 70% CO2 30% cm/sec(m/sqrt(cm))