T0PMT2010 815qians@ihep.ac.cn

2010 .

VMEPMT SPEPMT

BES E-TOFT0T0VMEPMT SPEPMT

BES E-TOFMRPC50psBES TOFTOFTOFTOF

MuonPielectron Barrel : Design / Current90ps / 76ps105ps / 90ps/ 79psEndcap : Design / Current110ps / 96ps138ps / 131ps/ 136ps

PMTH6533ScintillatorBC420QDC2249A250 pCTDC 2229250 psTime Resolution76psT0-- --BES-TOF-R&D-beam test T0

linear focussed PMTs R4998, typical gain G 5.7106 at B=0 Gauss, risetime 0.7 ns, TTS 160ps, equipped with active/passive divider a mu-metal shield extending 3 cm in front of the photocathode (H6533 assemblies)Copy fromThe design and commissioning of the MICE upstream time-of-flight system-- INFN/AE-10/1 22 Gennaio 2010PMTH6533ScintillatorBC420QDCV1724 (Flash ADC)TDCV1290 (25ps)Time Resolution 45psT0-- --MICE upstream time-of-flight system

BEPC800MeV E340psT0 T0-- --MRPC Beam test system

T0 BC420 PMTcutPMT-H6533SPEPMT

VME

----T0----T-AT-PRPC----lT-A T-P ----( L T-theta )T0PMTBC4205mmT0

VMEPMT SPEPMT

VMEV1718_USB_Bridge V2718_PCI_ BridgeQV96525fCdual range V785NADC V792NQDC TV775N(35ps); V1290N25psmultihitV200V560N--------VME4. SPE-Q5. PMTSPE-Q6. PMT/7. SPE-T1. SPE2. PMT3. SPE-Q4. SPE-Q

PMTLabVIEW + ROOT + MySQL1CAENUSB-1718BridgePCI-1728Bridge2VI34SY127SY1527

--------VME

VMEPMTPMTSPEPMTSPE-QPMTSPE-QSPEPMT

Poisson[1] pulserLEDQDC90%9.5% PoissonGaussGauss[2]

PMTSPE ----SPE [1]. Single Photoelectron Spectra Analysis for the Metal Dynode Photomultiplier. ATL-TILECAL-99-005 [2]. Study of 8"PMTs at UCLA For Pierre-Auger Surface Detectors.UCLA-Cosmic/2000-3

1) LED2) LEDpedestal10% =2.532@Nsignal/Ntotal=10.1% @HV=2500VGaussbkg_pi0pi0bkg_sigmasigmanbkgnsigPMTSPE ----LEDGDB60SPE

QDC25fCGainHamamastuH6533106SPE(Gain)(Hv)HV1750V2000V1900VPMTPMT

1.PMT2.SPE-QPMTSPE-Q

SPE-QHVGain VS Sigma SigmaPMTSPE-Q

VMEPMTSPEPMT

T0 VMECBLTTQ 3QDCGausstotal PMTQ[1,2][1]. E.H.Bellamy, G.Bellettini etc. Nucl. Instr. and Meth. A339(1994)468-476 [2]. , , , 2005 06.

Gauss1pe ()2pe () LED1petotalQDC1channel=25ps5%1pe2pe

VMEPMTSPEPMT

PMTH6533ScintillatorBC420QDCV965 (25fC)TDCV1290 (25ps)Time Resolution:41.6ps

T-AP+625MeV1.56*25ps = 39ps

The EndThanks for your attention!

H6533

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