Reference Pulse Videos from In-flight 10x10 GEM Detector:
Videos taken on Feburary 5, 2021 (& Feburary 23, 2021 for Sr-90)
Sources: Fe-55, Am-241, and Cd-109 disk sources
Reading out 128 ganged strips on readout board
Threshold: 300 mV, Positive Edge
Total Gain: 18
Time/Div: 10.0 us
Operating Current in HV divider: 718 uA
The trace signals for each is based on the following color codes:
Yellow = Amplifier Signal
Volt/Div: 1 V
Impedence Coupling: 1 MOhm DC (by mistake; should have been set to 50 Ohm)
Blue = Preamplifier Signal
Volt/Div: 50 mV
Impedence Coupling: 1 MOhm DC (by mistake; should have been set to 50 Ohm)
Note: "Open" configuration refers to no copper foil between kapton window to detector and disk source, "Close" configuration refers to copper foil between kapton window to detector and disk source.
