05/09/2011
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I did some counts test like:
The powers were:
PS1 and PS2: -1000 V n's: -1100 V
The PMT for n's detectors is PMT HAMAMATSU R580 with supply voltage 1250/1500 V. But I have used the value above, because I though the counts rate was reasonable. See my table below.
The thresholds were:
PS1 and PS2: -80 mV n's: -60 mV
Let see what we have. First without CF-243 source:
| counts/min | counts/min | counts/min | |
|---|---|---|---|
| PS1 | 153 counts/min | 170 counts/min | |
| PS2 | 150 counts/min | 173 counts/min | |
| n's | 358 counts/min | ||
| PS1+PS2 | 3.8 | 5.8 | 6.0 |