4长读出条MRPC性能研究孙勇杰KeyLaboratoryofTechnologyofParticleDetectionandElectronicsUSTC-IHEP,CASCenterofParticlePhysicsand Technology,USTC
长读出条MRPC性能研究 孙勇杰 Key Laboratory of Technology of Particle Detection and Electronics, USTC-IHEP, CAS Center of Particle Physics and Technology, USTC
IntroductionMRPCMRPC(Multi-gapResistivePlateChamber)isamajornewdetectortechnologyfirstdevelopedbytheALICEexperiment.TheconceptfirstpublishedonNucl.Instr.&Meth.A374(1996)132byM.C.S.Williamsetal.Essentiallyastackofresistive (glass)plates with electrodes stuck on the outsideAdvantages:Pick-upelectrodeMviarCarbon layerHV>Time resolutionglasslnssGasgaps-250μmglasselas>High efficiencyelasselassH>Low costCarbon layerMylatPick-upelectrode>Arbitrary readout shapeGood candidate for large areaTime-Of-Flightsystem!2Apr.18,2010NanChang University
Apr. 18, 2010 NanChang University 2 Introduction MRPC (Multi-gap Resistive Plate Chamber) is a major new detector technology first developed by the ALICE experiment. The concept first published on Nucl. Instr.& Meth. A374 (1996) 132 by M.C.S.Williams et al. Advantages: ➢Time resolution ➢High efficiency ➢Low cost ➢Arbitrary readout shape Good candidate for large area Time-Of-Flight system ! MRPC
MRPCsignalpickupSTAR TOFALICETOFLong-strip readout:saveelectronicschannels■Read out attwo ends口Meantime~3cmEliminate the position along the stripTime difference~6cmPositioninformation3Apr.18,2010NanChang University
Apr. 18, 2010 NanChang University 3 MRPC—signal pickup Long-strip readout: save electronics channels. Read out at two ends ◼ Mean time Eliminate the position along the strip ◼ Time difference Position information ~3cm ~6cm STAR TOF ALICE TOF
Possibleapplications STAR MTD (Muon telescope Detector) CBM TOF Wall (outer part)MTDTOF(RPC)ECALTRDRICHSTSbeamtargetdipolemagnet4Apr.18,2010NanChang University
Apr. 18, 2010 NanChang University 4 Possible applications STAR MTD (Muon telescope Detector) CBM TOF Wall (outer part) MTD
LMRPCPrototype-I950mmReadoutstripSize:950x256mm2Readoutstrip:25mmwide,4mmpcbgraphite layerglass+HVgapsbetweenstrips0.25mmActivearea:870x170mm?HVGasgaps:10x0.25mm,in2stacksGlass:0.7mm+HVHVelectrode:~200kQ/5Apr.18,2010NanChang University
Apr. 18, 2010 NanChang University 5 LMRPC Prototype-I Size: 950 x 256 mm2 Readout strip: 25 mm wide, 4 mm gaps between strips Active area: 870 x 170 mm2 Gas gaps: 10 x 0.25 mm, in 2 stacks Glass: 0.7 mm HV electrode: ~200 kΩ/□