Photon flux proportionality - Revision history

Kosiolek at 20:22, 11 June 2013

2013-06-11T20:22:16Z

2013-06-11T16:57:09Z

2013-06-11T16:55:50Z

2013-06-10T17:39:24Z

2013-06-10T17:37:27Z

2013-06-10T17:36:38Z

2013-06-10T17:33:56Z

2013-06-10T17:31:00Z

2013-06-10T17:29:23Z

2013-06-10T17:25:31Z

← Older revision		Revision as of 20:22, 11 June 2013
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	The neutron number ratio is 1271/518 = 2.45 .		The neutron number ratio is 1271/518 = 2.45 .

−	So the relative photon flux change is proportional to the relative number of prompt fission neutrons produced.	+	So the relative photon flux change is proportional to the relative number of prompt fission neutrons produced and normalization procedure using the SUM(0-90-0) is correct normalization for the asymmetry calculation.

@@ Line 23: / Line 23: @@
 The neutron number ratio is 2195/518 = 4.2 .
-If we consider another run
+If we consider another run and compare with the run 2467 (see above)
 run 2522 (19571 positrons total)

@@ Line 23: / Line 23: @@
 The neutron number ratio is 2195/518 = 4.2 .
-If we consider
+If we consider another run
 run 2522 (19571 positrons total)

← Older revision		Revision as of 17:39, 10 June 2013
Line 34:		Line 34:

	The neutron number ratio is 1271/518 = 2.45 .		The neutron number ratio is 1271/518 = 2.45 .
		+
		+	So the relative photon flux change is proportional to the relative number of prompt fission neutrons produced.

@@ Line 13: / Line 13: @@
 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 .
-In other way if we look at the integral number of positrons produced during the runs 30312/7770 = 3.9
+In other way if we look at the ratio of the integral number of positrons produced during the runs 30312/7770 = 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:
@@ Line 29: / Line 29: @@
 [[File:flux_DU_r2522.png | 400 px]]
-In other way if we look at the integral number of positrons produced during the runs 19571/7770 = 2.52
+If we look at the ratio of the integral number of positrons produced during the runs 19571/7770 = 2.52
 run 2522: SUM(0-90-0) = 1271 neutrons
 The neutron number ratio is 1271/518 = 2.45 .

@@ Line 31: / Line 31: @@
 In other way if we look at the integral number of positrons produced during the runs 19571/7770 = 2.52
-run 2522: SUM(0-90-0) =  neutrons
+run 2522: SUM(0-90-0) = 2151 neutrons
+The neutron number ratio is 2151/518 = 4.1 .

← Older revision		Revision as of 17:29, 10 June 2013
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	The neutron number ratio is 2195/518 = 4.2 .		The neutron number ratio is 2195/518 = 4.2 .
		+
		+	run 2522 (19571 positrons total)
		+
		+	[[File:flux_DU_r2522.png \| 400 px]]

	That means that photon flux monitor can be used for the purpose of relative normalization.		That means that photon flux monitor can be used for the purpose of relative normalization.

@@ Line 1: / Line 1: @@
 If we compare the photon flux from the two runs with DU target
-run 2467
+run 2467 (7770 positrons total)
 [[File:flux_DU_r2467.png | 400 px]]
@@ Line 7: / Line 7: @@
 and
-run 2506
+run 2506 (30312 positrons total)
 [[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 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: