Difference between revisions of "05/10/2011"
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| Line 33: | Line 33: | ||
|- | |- | ||
!PS1 | !PS1 | ||
| − | |187||160||166|| | + | |187||160||166||160.8||168.4 |
|- | |- | ||
!PS2 | !PS2 | ||
| − | |187||170||180.4|| | + | |187||170||180.4||184.4||180.4 |
|- | |- | ||
!PS1+PS2 | !PS1+PS2 | ||
| Line 42: | Line 42: | ||
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!n's | !n's | ||
| − | |205||204||201.2|| | + | |205||204||201.2||202.4||203.2 |
|} | |} | ||
Interesting. The same power for HAMAMATSU PMT, but different counts result. | Interesting. The same power for HAMAMATSU PMT, but different counts result. | ||
Revision as of 16:30, 10 May 2011
continue...the same set up as before, the distances are the same:
First I change the power supply for HAMAMATSU PMT to the new 2 channel one C.A.E.N N471
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 were:
PS1 and PS2: -80 mV n's: -60 mV
Let see what we have. First he CF-243 source is far far away (sealed in the safe):
| counts/min (1 min test) | counts/min (1 min test) | counts/min (5 min test) | counts/min (5 min test) | avg counts/min | |
|---|---|---|---|---|---|
| PS1 | 187 | 160 | 166 | 160.8 | 168.4 |
| PS2 | 187 | 170 | 180.4 | 184.4 | 180.4 |
| PS1+PS2 | |||||
| n's | 205 | 204 | 201.2 | 202.4 | 203.2 |
Interesting. The same power for HAMAMATSU PMT, but different counts result.