03-21-2017 - Revision history

Burgjeff: /* n-fold coincidence frequency */

2017-04-25T19:55:26Z

n-fold coincidence frequency

2017-04-25T19:50:21Z

n-fold coincidence frequency

2017-04-25T19:50:04Z

n-fold coincidence frequency

2017-04-25T19:47:24Z

2017-04-03T18:02:06Z

Double coincidence events

2017-04-03T17:56:06Z

Double coincidence events

2017-04-03T17:55:54Z

double coincidence events

2017-04-03T17:55:38Z

2017-03-28T22:07:43Z

CF252 ToF measurements

2017-03-28T22:07:17Z

CF252 ToF measurements

@@ Line 76: / Line 76: @@
 Number of coincidences after neutron cuts, per pulse.  The number of neutron coincidences corresponding to a given bin is the left-most integer of the bin.
 [[File:Neutron nfold coinc.png|700px]]
 [[2nCor 44| go_back]]

@@ Line 75: / Line 75: @@
 =n-fold coincidence frequency=
-Number of coincidences after neutron cuts, per pulse.  The number of coincidences corresponding to a given bin is the left-most integer of the bin.
+Number of coincidences after neutron cuts, per pulse.  The number of neutron coincidences corresponding to a given bin is the left-most integer of the bin.
 [[File:Neutron nfold coinc.png|700px]]

← Older revision		Revision as of 19:50, 25 April 2017
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	=n-fold coincidence frequency=		=n-fold coincidence frequency=
		+
		+	Number of coincidences after neutron cuts, per pulse. The number of coincidences corresponding to a given bin is the left-most integer of the bin.

	[[File:Neutron nfold coinc.png\|700px]]		[[File:Neutron nfold coinc.png\|700px]]

← Older revision		Revision as of 19:47, 25 April 2017
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	[[File:CF252 ThBeam OverLay.png\|800px]]		[[File:CF252 ThBeam OverLay.png\|800px]]
		+
		+
		+	=n-fold coincidence frequency=
		+
		+	[[File:Neutron nfold coinc.png\|700px]]
		+
		+

	[[2nCor 44\| go_back]]		[[2nCor 44\| go_back]]

@@ Line 35: / Line 35: @@
 =Double coincidence events=
-Here is a 2-D plot of ToF vs ToF from pulses that had a hit in two detectors. If the events occurring after the main gamma peak are related to the gun pulse, then they would be concentrated along the y=x line of this plot, which is not what we see here.
+Here is a 2-D plot of ToF vs ToF from pulses that had a hit in two detectors. If the events occurring after the main gamma peak are gun pulse related, then they should be concentrated along the y=x line of this plot, which is not what we see here.
 [[File:TOF4DoubleCoincR6229.png|800px]]

@@ Line 37: / Line 37: @@
 Here is a 2-D plot of ToF vs ToF from pulses that had a hit in two detectors. If the events occurring after the main gamma peak are related to the gun pulse, then they would be concentrated along the y=x line of this plot, which is not what we see here.
-[[File:TOF4DoubleCoincR6229.png|750px]]
+[[File:TOF4DoubleCoincR6229.png|800px]]
 =Run 6229 (target malfunction)=

@@ Line 33: / Line 33: @@
 |6230 || '''2400 +-200 pV*s''' || Th|| '''3 in of Borated (purple) poly covering D78''' ,  7 MeV , 3 ns FWHM pulse width ,'''?? A Peak''' , 180.4 Hz , Radiator 0.5" Al. ,  HV/disc. 30T: 1450;30 , 30B:1450;30 , 54T: 1450;30 , 54B: 1450;30 , 78T:1500;30 , 78B: 1525;30 , 126T: 1500;30 , 126B: 1500;30 , 150T: 1500;40 , 150B: 1500;40 , 210T: 1500;40 , 210B: 1500;40 , 234T: 1500;30 , 234B: 1500;30 , 258T: 1350;30, 258B: 1450;30 , 306T: 1400;30 , 306B: 1400;30 , 330T: 1450;30 , 330B: 1500;30||   [[File:R6230.png|200px]]  ||This overlay only includes events from the first 30 mins of run 6229 since I believe the target was still attached during this time.  -Jeff [[File:R6229-R6230Overlay.png|200px]]  || [[File:R6230AllPMTS.png|200px]]
 |}
 =Run 6229 (target malfunction)=

@@ Line 59: / Line 59: @@
 A Cf252 ToF measurement was done with thresholds and HV left as they were at the end of the run on March 21, both with and without 3" of poly covering D78. The reason for comparing poly with no poly was to observe how it moderates fission neutrons, since we didn't see a drop in the "neutron" rate as expected for run 6230, which had 3" of poly placed on D78.
-[[File:CF252Poly&NoPolyOnD78.png|600px]]
+[[File:CF252Poly&NoPolyOnD78.png|800px]]
 Here is an overlay of run 6227 and a Cf252 ToF measurement.
-[[File:CF252 ThBeam OverLay.png|600px]]
+[[File:CF252 ThBeam OverLay.png|800px]]
 [[2nCor 44| go_back]]