Difference between revisions of "05/16/2011 coincidence test"

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Set up like that:  
 
Set up like that:  
  
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|-
 
|-
 
!PS1
 
!PS1
−
|<math>7513\pm</math>||60 min||<math>\pm</math>
+
|<math>7513\pm86.5</math>||60 min||<math>2.09\pm0.02</math>
 
|-
 
|-
 
!PS2
 
!PS2
−
|<math>9036\pm</math>||60 min||<math>\pm</math>
+
|<math>9036\pm95.1</math>||60 min||<math>2.51\pm0.03</math>
 
|-
 
|-
 
!PS1+PS2  
 
!PS1+PS2  
−
|<math>251\pm</math>||60 min||<math>(\pm)\cdot 10^{-2}</math>
+
|<math>251\pm15.8</math>||60 min||<math>(6.9\pm0.4)\cdot 10^{-2}</math>
 
|}
 
|}
  

Latest revision as of 16:28, 16 May 2011

Set up like that:

Detector1.png

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]7513\pm86.5[/math] 60 min [math]2.09\pm0.02[/math]
PS2 [math]9036\pm95.1[/math] 60 min [math]2.51\pm0.03[/math]
PS1+PS2 [math]251\pm15.8[/math] 60 min [math](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]\frac{7.7}{4.9} = 1.6[/math]
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