TAGH PMT testing

After PMT leads and cables have been soldered to PCBs:

• Place assembled PMTs in light-tight box and connect cables
• Verify that PMT, diffuser & attenuator stand, and Picosecond Laser are aligned
• Turn on HV and check monitored current, ramp up to 850 V
• Turn on Picosecond Laser (intensity scale to 1.5, freq. to 100 kHz)
• 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