05/12/2011

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The powers are:

PS1 and PS2:  -1000 V (the old 2-channel TENNELEC TC952)
n's: -1100 V (the new 2-channel C.A.E.N N471)

The thresholds are:

PS1 and PS2:  -80 mV
n's: -200 mV

The discriminator widths are:

PS1: -20 ns
PS2: -10 ns
n's: -20 ns

Let's do the random coincidence cosmic ray test. PS1 and PS2 is about 30 cm away from each other. And let's look on the coincidence signal between PS1 and PS2:

	total counts	time	counts/min	counts/sec
PS1	10247[math]\pm[/math]101.2	70 min	146.4[math]\pm[/math]1.44	2.44[math]\pm[/math]0.02
PS1	12969[math]\pm[/math]113.9	70 min
PS1+PS2	3[math]\pm[/math]1.7	70 min