Difference between revisions of "05/12/2011"

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Let's do the random coincidence test. PS1 and PS2 is about 30 cm away from each other. And let's look on the coincidence signal between PS1 and PS2:
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Let's do the '''random coincidence cosmic ray test'''. PS1 and PS2 is about 30 cm away from each other. And let's look on the coincidence signal between PS1 and 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" |  
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! scope="col" width="50" | counts/sec (1 hour min test), no source
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! scope="col" width="50" | total counts
 +
! scope="col" width="50" | time
 +
! scope="col" width="50" | counts/min
 +
! scope="col" width="50" | counts/sec
 
|-
 
|-
 
!PS1  
 
!PS1  
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|<math>\pm</math>   (total  cnts)
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|10247<math>\pm</math>101.2||70 min||146.4<math>\pm</math>1.44||2.44<math>\pm</math>0.02
 
|-
 
|-
 
!PS1  
 
!PS1  
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|<math>\pm</math>   (total  cnts)
+
|12969<math>\pm</math>113.9||70 min||
 
|-
 
|-
 
!PS1+PS2  
 
!PS1+PS2  
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|<math>\pm</math>   (total  cnts)
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|3<math>\pm</math>1.7||70 min||
 
|}
 
|}

Revision as of 19:45, 12 May 2011

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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 are: 

PS1 and PS2:  -80 mV
n's: -200 mV

The discriminator widths are: 

PS1: -20 ns
PS2: -10 ns
n's: -20 ns


Let's do the random coincidence cosmic ray test. PS1 and PS2 is about 30 cm away from each other. And let's look on the coincidence signal between PS1 and PS2:

total counts time counts/min counts/sec
PS1 10247[math]\pm[/math]101.2 70 min 146.4[math]\pm[/math]1.44 2.44[math]\pm[/math]0.02
PS1 12969[math]\pm[/math]113.9 70 min
PS1+PS2 3[math]\pm[/math]1.7 70 min
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