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TOP カウンター に 搭載される光検出器 寿命対策 MCP-PMT の測定. 2010.2.23.Tue 名古屋大学 高エネルギー物理学研究室 (N 研 ) 有田義宣. TOP カウンターについて. □ 次期 B-Factory ⇒ e+ e- で □ BELLEⅡ 検出器の粒子識別装置 □ TOP(Time Of Propagation) カウンター. π / K の 到達時間差 から. Photo detector. Quatz bar. θc = β を求める. 光検出器への要求 一光子検出 時間分解能 < 40ps - PowerPoint PPT Presentation
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TOPMCP-PMT2010.2.23.Tue (N)
TOP(c:Cherenkov angle)
Photo detectorQuatz bar22010B-Factory e+ e-BELLETOP(Time Of Propagation)
/K c = 40ps () 17%(@400nm)
BELLEPIDTPOB-Factory/Ksepareation
2
MCP-PMT32010
Micro Channel PlateMCPMCP(MicroChannelPlate)MCP10um
400umMCP-PMT
3
MCP-PMT42010
Micro Channel PlateMCPMCP(MicroChannelPlate)MCP10um
MCP-PMT400ps)~106(MCP)
2.5 GHz : 200 ps/div: 10m V/div 150ps400umMCP-PMT
4MCP-PMT52010
10mm27.5mm27.5mm()()MCP-PMT22.5x22.5 cm2(6)Gain1~210630ps(4 or 4x4ch)TOP
Q.EMCP-PMT
520106
MCP-PMTMCP-PMTYJ00Xch
MCP-PMT(QE)BELLE620107QEPMT
AlMCP
MCP-PMTQ.E
AlMCP782010 attenAmpDiscriminatorTDCADCPLP()startstopMCP-PMT1mm
(PiLAS)=630nm(FWHM)35ps10ps892010
33.9 0.3 ps
17%(@400nm)300-400nmPMTcherenkov111220101320102~3LEDQ.E
LED40/cm2/1pulsePulse Rate 1~20kHz() Q.E.(Calibration PMT)
LED
13142010
MCP-PMT()MCP-PMTTOPPMTMCP-PMT1~20kHz14152010BELLETOP
MCP-PMTQ.EAlMCPMCP
MCP-PMTTOPQ.E
MCP-PMT10(3)
MCP-PMTTOP20101617
201018
()by P.Michelato ,etcMultialkali Thin Photocathode for Hight Brightness guns,proc,EPAC94MCP-PMT192010TOPS[]TOFTOPTOPTOPcCherenkovTOPN
/K(@P=4GeV/c)(TOF+TOP)>35psec.S~4
1. 40psec2. N20
MCP(Micro Channel Plate)PMTMCP-PMT
27.5mm27.5mmMCP-PMT719202010
MCP-PMTTTS(TransitTimeSpread)
40psPMTTTS40psec
20212010
25psec/bin33.9 0.3 ps
17%Q.EC.EC.EQ.E22