05/16/2011 coincidence test: Difference between revisions
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Created page with ' Set up like that: 400px the distance between PS and n's PMT is abot 50 cm The voltages, thresholds and widths are as below. Note: I increased my …' |
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!PS1 | !PS1 | ||
|<math>\ | |<math>7513\pm86.5</math>||60 min||<math>2.09\pm0.02</math> | ||
|- | |- | ||
!PS2 | !PS2 | ||
|<math>\ | |<math>9036\pm95.1</math>||60 min||<math>2.51\pm0.03</math> | ||
|- | |- | ||
!PS1+PS2 | !PS1+PS2 | ||
|<math>\ | |<math>251\pm15.8</math>||60 min||<math>(6.9\pm0.4)\cdot 10^{-2}</math> | ||
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Latest revision as of 16:28, 16 May 2011
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 | |
|---|---|---|---|
| PS1 | -1000 | -100 | 50 |
| PS1 | -1000 | -100 | 50 |
| n's | -1500 | -200 | 10 |
First let's do the PS1+PS2 coincidence test
| counts | time | counts/sec | |
|---|---|---|---|
| PS1 | [math]\displaystyle{ 7513\pm86.5 }[/math] | 60 min | [math]\displaystyle{ 2.09\pm0.02 }[/math] |
| PS2 | [math]\displaystyle{ 9036\pm95.1 }[/math] | 60 min | [math]\displaystyle{ 2.51\pm0.03 }[/math] |
| PS1+PS2 | [math]\displaystyle{ 251\pm15.8 }[/math] | 60 min | [math]\displaystyle{ (6.9\pm0.4)\cdot 10^{-2} }[/math] |
Second do the PS1+PS2+n's coincidence test
The ratio of (PS+PS2) rate to (PS+PS2+n's) rate is
[math]\displaystyle{ \frac{7.7}{4.9} = 1.6 }[/math]