05/16/2011 coincidence test - Revision history

Shaproma at 16:28, 16 May 2011

2011-05-16T16:28:30Z

Shaproma at 16:24, 16 May 2011

2011-05-16T16:24:25Z

Shaproma: 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 …'

2011-05-16T15:19:01Z

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 …'

New page

Set up like that:

[[File:Detector1.png | 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 thresholds for PS1 and PS2 from 80 mV up to 100 mV according to my previous calibration threshold line.
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;"
! scope="col" width="50" |
! scope="col" width="50" | PMT voltage, V
! scope="col" width="50" | threshold, mV
! scope="col" width="50" | 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'''
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;"
! scope="col" width="50" |
! scope="col" width="50" | counts
! scope="col" width="50" | time
! scope="col" width="50" | counts/sec
|-
!PS1
|<math>\pm</math>|| min||<math>\pm</math>
|-
!PS2
|<math>\pm</math>|| min||<math>\pm</math>
|-
!PS1+PS2
|<math>\pm</math>|| min||<math>(\pm)\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>

@@ Line 1: / Line 1: @@
 Set up like that:
@@ Line 35: / Line 34: @@
 |-
 !PS1
-|<math>7513\pm</math>||60 min||<math>\pm</math>
+|<math>7513\pm86.5</math>||60 min||<math>2.09\pm0.02</math>
 |-
 !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
-|<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>
 |}