Difference between revisions of "05/19/2011 n's detector threshold calibration source/(w/source)"
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First I did my calibration for power supply voltage -1250 V: | First I did my calibration for power supply voltage -1250 V: | ||
| − | [[File:Det1 calibraton source 1250V.png | | + | [[File:Det1 calibraton source 1250V.png | 800 px]] [[File:Det1 calibraton source 1250 log.png | 800 px]] |
Second I did my calibration for power supply voltage -1500 V: | Second I did my calibration for power supply voltage -1500 V: | ||
| − | [[File:Det1 calibraton source 1500V.png | | + | [[File:Det1 calibraton source 1500V.png | 800 px]] [[File:Det1 calibraton source 1500 log.png | 800 px]] |
And bellow I overlay both cases (-1250 V and -1500 V) | And bellow I overlay both cases (-1250 V and -1500 V) | ||
| − | [[File:Det1 calibraton source 1250 1500.png | | + | [[File:Det1 calibraton source 1250 1500.png | 800 px]] [[File:Det1 calibraton source 1250 1500 log.png | 800 px]] |
'''There are no any plateaus, so what is the threshold should be?''' | '''There are no any plateaus, so what is the threshold should be?''' | ||
Revision as of 04:37, 20 May 2011
Below are my counts rate measurements as function of threshold voltage for n's detector. The source was CF252. The distance between source and n's PMT was about 50 cm. The counts rate was calculated as:
First I did my calibration for power supply voltage -1250 V:
Second I did my calibration for power supply voltage -1500 V:
And bellow I overlay both cases (-1250 V and -1500 V)
There are no any plateaus, so what is the threshold should be?