Pre-shipping PMT screening at Chiba
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Transcript of Pre-shipping PMT screening at Chiba
50nsec
CAMACCAMACCrate
Controller
CrateController
ADCADC
GP-IBGP-IBFunctionGenerator
FunctionGenerator
NIMNIM
Amp (*10)Amp (*10)
DiscriminatorDiscriminator
Gate GeneratorGate Generator
ScalerScaler
PCI CardPCI CardCAMACInterface
CAMACInterface
GP-IBInterface
GP-IBInterface
Gate GeneratorGate Generator
LinuxPC
TTL-NIM Converter
TTL-NIM Converter
Sync.Sync.
UV LED
PMTPMT
Freezer(-32 )℃
Gate
Signal
Setup
Gain Summary
Gain at 2000V
Our Criteria is 5×10+7 with 2000 V.
11 out of 14 PMTs satisfied it.
SF0001 SF0004 SF0010 SF0016 SF0023 SF0030 SF00374.05E+07 5.05E+07 1.21E+08 1.24E+08 3.83E+07 4.58E+07 7.56E+07
SF0043 SF0050 SF0056 SF0067 SF0070 SF0080 SF00861.11E+08 3.79E+08 1.91E+08 2.63E+08 2.14E+08 1.58E+08 2.91E+08
8μsec
CAMACCAMACCrate
Controller
CrateController
ADCADC
GP-IBGP-IBFunctionGenerator
FunctionGenerator
NIMNIM
Amp (*10)Amp (*10)
DiscriminatorDiscriminator
Gate GeneratorGate Generator
ScalerScaler
PCI CardPCI CardCAMACInterface
CAMACInterface
GP-IBInterface
GP-IBInterface
Gate GeneratorGate Generator
TTL-NIM Converter
TTL-NIM Converter
Sync.Sync.
UV LED
PMTPMT
Freezer(-32 )℃
Setup for the noise measurement
Gain vs Noise Rate
0
200
400
600
800
1000
1200
0.00E+00 5.00E+07 1.00E+08 1.50E+08 2.00E+08 2.50E+08 3.00E+08 3.50E+08 4.00E+08
NoiseRate[Hz]
Gain
PMT # SF0050
Gain vs Noise Rate
0
100
200
300
400
500
600
700
800
900
1000
0.00E+00 5.00E+07 1.00E+08 1.50E+08 2.00E+08 2.50E+08 3.00E+08 3.50E+08 4.00E+08
NoiseRate[Hz]
Gain
HV is 2000V
Summary
Gain, P/V and noise has been measured for the 14 tubes before shipping to UW/DESY/StockholmNo problems on noise and P/V has foundSome low gain tunes needs amplification for single p.e. measurement with HV < 1700 V3 tubes out of 14 has might-be-too-low gain of ~4x107 with 2000 VThe excel table and ADC spectrum data can be downloaded from our website.