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

From New IAC Wiki
Jump to navigation Jump to search
Line 63: Line 63:
  
  
 +
'''Second do the PS1+PS2+n's coincidence test '''
  
−
The scope picture of PS1+PS2 coincidence event like:
 
−
 
−
[[File:Cosmic coinc PS1 PS2.png | 800px]]
 
−
 
−
 
−
 
−
 
−
'''Second tet's do the PS1+PS2+n's coincidence test '''
 
 
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;"
 
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;"
 +
|+The distance between PS and n's PMT is about 80 cm
 
! scope="col" width="50" |  
 
! scope="col" width="50" |  
 
! scope="col" width="50" | counts
 
! scope="col" width="50" | counts
Line 86: Line 80:
 
!PS1+PS2+n's  
 
!PS1+PS2+n's  
 
|<math>59\pm7.7</math>||20 min||<math>(4.9\pm0.6)\cdot 10^{-2}</math>
 
|<math>59\pm7.7</math>||20 min||<math>(4.9\pm0.6)\cdot 10^{-2}</math>
 +
|}
 +
 +
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;"
 +
|+The distance between PS and n's PMT is about 50 cm
 +
! scope="col" width="50" |
 +
! scope="col" width="50" | counts
 +
! scope="col" width="50" | time
 +
! scope="col" width="50" | counts/sec
 +
|-
 +
!PS1
 +
|<math>\pm</math>||60 min||<math>\pm0.05</math>
 +
|-
 +
!PS2
 +
|<math>\pm</math>||60 min||<math>\pm0.05</math>
 +
|-
 +
!PS1+PS2+n's
 +
|<math>\pm</math>||60 min||<math>(\pm)\cdot 10^{-2}</math>
 
|}
 
|}
 +
  
  
 
The scope picture of PS1+PS2 coincidence event like:
 
The scope picture of PS1+PS2 coincidence event like:
 +
 +
[[File:Cosmic coinc PS1 PS2.png | 800px]]
 +
 +
 +
 +
The scope picture of PS1+PS2+n coincidence event like:
  
 
[[File:Cosmic coinc PS1 PS2 n.png | 800px]]
 
[[File:Cosmic coinc PS1 PS2 n.png | 800px]]

Revision as of 16:39, 16 May 2011

Set up like that:

Detector1.png


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.

The distance between PS and n's PMT is about 80 cm
counts time counts/sec
PS1 [math]2823\pm53.1[/math] 20 min [math]2.35\pm0.04[/math]
PS2 [math]3091\pm55.6[/math] 20 min [math]2.58\pm0.05[/math]
PS1+PS2 [math]93\pm9.6[/math] 20 min [math](7.7\pm0.8)\cdot 10^{-2}[/math]
The distance between PS and n's PMT is about 50 cm
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 distance between PS and n's PMT is about 80 cm
counts time counts/sec
PS1 [math]3229\pm56.8[/math] 20 min [math]2.69\pm0.05[/math]
PS2 [math]3192\pm56.5[/math] 20 min [math]2.66\pm0.05[/math]
PS1+PS2+n's [math]59\pm7.7[/math] 20 min [math](4.9\pm0.6)\cdot 10^{-2}[/math]
The distance between PS and n's PMT is about 50 cm
counts time counts/sec
PS1 [math]\pm[/math] 60 min [math]\pm0.05[/math]
PS2 [math]\pm[/math] 60 min [math]\pm0.05[/math]
PS1+PS2+n's [math]\pm[/math] 60 min [math](\pm)\cdot 10^{-2}[/math]


The scope picture of PS1+PS2 coincidence event like:

Cosmic coinc PS1 PS2.png


The scope picture of PS1+PS2+n coincidence event like:

Cosmic coinc PS1 PS2 n.png


The ratio of (PS+PS2) rate to (PS+PS2+n's) rate is 

[math]\frac{7.7}{4.9} = 1.6[/math]
Retrieved from "https://wiki.iac.isu.edu/index.php?title=05/13/2011_coincidence_test&oldid=63074"