Difference between revisions of "05/13/2011 coincidence test"
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| Line 26: | Line 26: | ||
| − | Let's do first the coincidence test PS1+PS2 | + | |
| + | |||
| + | '''Let's do first the coincidence test PS1+PS2''' | ||
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;" | {| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;" | ||
! scope="col" width="50" | | ! scope="col" width="50" | | ||
| Line 34: | Line 36: | ||
|- | |- | ||
!PS1 | !PS1 | ||
| − | |2823<math>\pm</math>||20 min||<math>\pm</math> | + | |2823<math>\pm</math>53.1||20 min||2.35<math>\pm</math>0.04 |
|- | |- | ||
!PS2 | !PS2 | ||
| − | |3091<math>\pm</math>||20 min||<math>\pm</math> | + | |3091<math>\pm</math>55.6||20 min||2.57<math>\pm</math>0.05 |
|- | |- | ||
!PS1+PS2 | !PS1+PS2 | ||
| − | |93<math>\pm</math>||20 min||<math>\pm</math> | + | |93<math>\pm</math>9.6||20 min||(7.7<math>\pm</math>0.8)\cdot 10^{-2} |
|} | |} | ||
Revision as of 21:56, 13 May 2011
Set up like that:
the distance between PS and n's PMT is abot 80 cm
The voltages and thresholds are as below. Note: I increased my thresholds for PS1 and PS2 from 80 mV up to 100 mV according to mu previous calibration threshold line.
| PMT voltage, V | threshold, mV | discr. width, ns | |
|---|---|---|---|
| PS1 | -1500 | -80 | 100 |
| PS1 | -1500 | -80 | 100 |
| n's | -1500 | -200 | 10 |
Let's do first the coincidence test PS1+PS2
| counts | time | counts/sec | |
|---|---|---|---|
| PS1 | 282353.1 | 20 min | 2.350.04 |
| PS2 | 309155.6 | 20 min | 2.570.05 |
| PS1+PS2 | 939.6 | 20 min | (7.70.8)\cdot 10^{-2} |
The scope picture of PS1+PS2 coincidence event like:
