Difference between revisions of "05/13/2011 coincidence test"

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|93<math>\pm</math>9.6||20 min||<math>(7.7\pm0.8)\cdot 10^{-2}</math>
 
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Revision as of 21:57, 13 May 2011

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Set up like that:

Detector1.png

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 2823[math]\pm[/math]53.1 20 min 2.35[math]\pm[/math]0.04
PS2 3091[math]\pm[/math]55.6 20 min 2.57[math]\pm[/math]0.05
PS1+PS2 93[math]\pm[/math]9.6 20 min [math](7.7\pm0.8)\cdot 10^{-2}[/math]


The scope picture of PS1+PS2 coincidence event like:

Cosmic coinc PS1 PS2.png