Photon flux proportionality: Difference between revisions
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[[File:flux_DU_r2506.png | 400 px]] | [[File:flux_DU_r2506.png | 400 px]] | ||
The average photon flux increased from 90 <math>e^+/min</math> to 350 <math>e^+/min</math> and the ratio is 350/90 = 3.9. | The average photon flux increased from 90 <math>e^+/min</math> to 350 <math>e^+/min</math> and the ratio is 350/90 = 3.9 . | ||
The number of neutrons used to do narmalization, i.e. the sum of the number of neutrons in three detectors placed at 0 deg left, 90 deg bottom and 0 deg right changed as follows: | The number of neutrons used to do narmalization, i.e. the sum of the number of neutrons in three detectors placed at 0 deg left, 90 deg bottom and 0 deg right changed as follows: | ||
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run 2506: SUM(0-90-0) = 2195 neutrons | run 2506: SUM(0-90-0) = 2195 neutrons | ||
The neutron number ratio is 2195/518 = 4.2 . | |||
That means that photon flux monitor can be used for the purpose of relative normalization. | |||
Revision as of 17:19, 10 June 2013
If we compare the photon flux from the two runs with DU target
run 2467
and
run 2506
The average photon flux increased from 90 [math]\displaystyle{ e^+/min }[/math] to 350 [math]\displaystyle{ e^+/min }[/math] and the ratio is 350/90 = 3.9 .
The number of neutrons used to do narmalization, i.e. the sum of the number of neutrons in three detectors placed at 0 deg left, 90 deg bottom and 0 deg right changed as follows:
run 2467: SUM(0-90-0) = 518 neutrons
run 2506: SUM(0-90-0) = 2195 neutrons
The neutron number ratio is 2195/518 = 4.2 .
That means that photon flux monitor can be used for the purpose of relative normalization.