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Pre-shipping PMT screening at Chiba

Pre-shipping PMT screening at Chiba. Chiba University Shigeru Yoshida for Kazuhiro “ Jee ” Fujimoto. Freezer. Produced by Nihon Freezer. Temp –32 degree. PMT Setting into Freezer. Base circuit. Diffuser attached to UV LED. Setup. CAMAC. PCI Card. GP-IB. LinuxPC. Crate

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Pre-shipping PMT screening at Chiba

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  1. Pre-shipping PMT screening at Chiba Chiba University Shigeru Yoshida for Kazuhiro “Jee” Fujimoto

  2. Freezer Produced by Nihon Freezer Temp –32degree

  3. PMT Setting into Freezer Base circuit Diffuser attached to UV LED

  4. Setup CAMAC PCI Card GP-IB LinuxPC Crate Controller CAMAC Interface Function Generator ADC GP-IB Interface Sync. Signal NIM 50nsec Gate Amp (*10) Freezer(-32℃) Discriminator Gate Generator PMT UV LED Scaler Gate Generator TTL-NIM Converter

  5. ADC Spectrum（Low Gain) Without Amp With Amp

  6. ADC Spectrum(High Gain) Without Amp With Amp

  7. ADC Spectrum(Log Scale) HV 2000V Without Amp With Amp

  8. Gain vs HV W/o Amp w/ Amp

  9. Gain with Amplification calibrated

  10. Crosscheck Without Amp With Amp

  11. Comparison Light w/o amp Dark w/ amp

  12. Gain Summary Our Criteria is 5×10+7 with 2000 V. 11 out of 14 PMTs satisfied it. Gain at 2000V

  13. Setup for the noise measurement CAMAC PCI Card GP-IB Crate Controller CAMAC Interface Function Generator ADC GP-IB Interface Sync. NIM Amp (*10) Freezer(-32℃) Discriminator Gate Generator 8μsec PMT UV LED Scaler Gate Generator TTL-NIM Converter

  14. PMT # SF0050 NoiseRate[Hz] Gain vs Noise Rate Gain

  15. Gain vs Noise Rate HVis 2000V NoiseRate[Hz] Gain

  16. Summary • Gain, P/V and noise has been measured for the 14 tubes before shipping to UW/DESY/Stockholm • No problems on noise and P/V has found • Some low gain tunes needs amplification for single p.e. measurement with HV < 1700 V • 3 tubes out of 14 has might-be-too-low gain of ~4x107 with 2000 V • The excel table and ADC spectrum data can be downloaded from our website.

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