TAGH PMT testing

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PSL in light tight box.png

After PMT leads and cables have been soldered to PCBs:

  • Place assembled PMTs in light-tight box, secure its position with a cable tie, and connect cables (HV channel 0, signal1 to scope chan.1, signal2 to scope chan.2)
  • Verify that PMT, diffuser & attenuator stand, and Picosecond Laser are aligned
  • Turn on HV and check monitored current - initially set HV to 100V, then ramp up to 850 V
  • Turn on Picosecond Laser (intensity scale to 1.5, freq. to 100 kHz), switch safe box on top of the light-tight box
  • Check signals on oscilloscope, use measurement function to report min/max within the peak and integral
  • Ramp laser frequency to 1 MHz, 2 MHz, 5 MHz, 10 MHz
  • Repeat frequency scan for HV=900 V, 1000 V, 1100 V
  • Check for break-down voltage and frequency
  • Report results on excel sheet, save snapshots of scope signal

Media:TAGH_pmt_tests.xlsx