05/11/2011 neutron detector threshold calibration - Revision history

Shaproma at 21:02, 19 May 2011

2011-05-19T21:02:24Z

Shaproma at 05:18, 14 May 2011

2011-05-14T05:18:58Z

Shaproma at 05:09, 14 May 2011

2011-05-14T05:09:33Z

Shaproma at 05:06, 14 May 2011

2011-05-14T05:06:41Z

Shaproma at 04:52, 14 May 2011

2011-05-14T04:52:55Z

Shaproma: Created page with '[https://wiki.iac.isu.edu/index.php/N%27s_detector_calibration Go Back] Because is something wrong I decided to measure the counts rate as function of threshold energy. Maybe m…'

2011-05-13T15:01:55Z

Created page with '[https://wiki.iac.isu.edu/index.php/N%27s_detector_calibration Go Back] Because is something wrong I decided to measure the counts rate as function of threshold energy. Maybe m…'

New page

[https://wiki.iac.isu.edu/index.php/N%27s_detector_calibration Go Back]

Because is something wrong I decided to measure the counts rate as function of threshold energy. Maybe my threshold was incorrect.

Below are my results for n's detector with HAMAMATSU PMT (-1500 V):

[[File:Det1 callibration.png | 1000 px]]

So it looks like my previous threshold value (-500 mV) was not good. Let's set it up the -200 mV. And let's see does the n's detector sensitive to the source. The same set up and distances as before.
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;"
! scope="col" width="50" |
! scope="col" width="50" | counts/sec (5 min test), no source
! scope="col" width="50" | counts/sec (5 min test), with source on the top of PS1
|-
!n's
|19.89<math>\pm</math>0.26 (total 5966 cnts) || 58.84<math>\pm</math>0.29 (total 17652 cnts)
|}

So now we see the source. The ratio are:

<math>\frac{Rate_{source}}{Rate_{w/source}} = \frac{58.84}{19.89} = 2.96 </math>

← Older revision	Revision as of 21:02, 19 May 2011
Line 1:	Line 1:
−	+	[https://wiki.iac.isu.edu/index.php/N%27s_detector_calibration Go Back]

← Older revision		Revision as of 05:18, 14 May 2011
Line 1:		Line 1:
−	~~[https://wiki.iac.isu.edu/index.php/N%27s_detector_calibration Go Back]~~	+

← Older revision		Revision as of 05:09, 14 May 2011
Line 1:		Line 1:
−	[https://wiki.iac.isu.edu/index.php/N%~~27s_det_calibration~~ Go Back]	+	[https://wiki.iac.isu.edu/index.php/N%27s_detector_calibration Go Back]

← Older revision		Revision as of 05:06, 14 May 2011
Line 1:		Line 1:
−	[https://wiki.iac.isu.edu/index.php/N%~~27s_detector_calibration~~ Go Back]	+	[https://wiki.iac.isu.edu/index.php/N%27s_det_calibration Go Back]

@@ Line 10: / Line 10: @@
-So it looks like my previous threshold value (-500 mV) was not good. Let's set it up the -200 mV. And let's see does the n's detector sensitive to the source. The same set up and distances as before.
+So it looks like my previous threshold value (-500 mV) was not good. '''Let's set it up the -200 mV.''' And let's see does the n's detector sensitive to the source. The same set up and distances as before.
 {| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;"
 ! scope="col" width="50" |