05/16/2011 coincidence test
Set up like that:
the distance between PS and n's PMT is abot 50 cm
The voltages, thresholds and widths are as below. Note: I increased my thresholds for PS1 and PS2 from 80 mV up to 100 mV according to my previous calibration threshold line.
|PMT voltage, V||threshold, mV||discr. width, ns|
First let's do the PS1+PS2 coincidence test
Second do the PS1+PS2+n's coincidence test
The ratio of (PS+PS2) rate to (PS+PS2+n's) rate is