CrossTalk - Revision history

Burgjeff: /* input deck */

2017-02-22T21:58:09Z

input deck

Burgjeff: /* Simulation results */

2017-02-22T21:57:38Z

Simulation results

Burgjeff: /* Simulation results */

2017-02-17T21:49:27Z

Simulation results

Burgjeff: /* Simulation results */

2017-02-17T21:44:15Z

Simulation results

Burgjeff: /* Simulation results */

2017-02-17T21:43:50Z

Simulation results

Burgjeff: /* Simulation results */

2017-02-17T21:40:11Z

Simulation results

Burgjeff: /* Simulation geometry */

2017-02-17T21:38:37Z

Simulation geometry

Burgjeff at 21:35, 17 February 2017

2017-02-17T21:35:27Z

Burgjeff: /* Simulation results */

2016-07-21T06:04:10Z

Simulation results

Burgjeff at 02:49, 21 July 2016

2016-07-21T02:49:32Z

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-=input deck=
+=MCNP POLIMI input deck=
 [[File:POLIMICrossTalkSimulation2017.txt]]
 Go back [[MCNP simulations]]

← Older revision		Revision as of 21:57, 22 February 2017
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		+	=input deck=
		+	[[File:POLIMICrossTalkSimulation2017.txt]]
		+
	Go back [[MCNP simulations]]		Go back [[MCNP simulations]]

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 =Simulation results=
-The number of n-n coincidences was a factor of 36 times greater than the number of n-crosstalk coincidences. n-n coincidence is defined as an event as two or more neutrons from the same fission registering a hit in two different detectors. If two neutrons are detected in coincidence, then that makes one n-n opening angle, three coincident neutrons makes three n-n opening angles, four neutrons makes six  opening angles.  and so on. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
+The number of n-n coincidences was a factor of 36 times greater than the number of n-crosstalk coincidences. n-n coincidence is defined as an event as two or more neutrons from the same fission registering a hit in two different detectors. If two neutrons are detected in coincidence, then that makes one n-n opening angle, three coincident neutrons makes three n-n opening angles, four neutrons makes six  opening angles, and so on. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
 [[File:CrosstalkVScoincidence.png|750px]]

@@ Line 19: / Line 19: @@
 =Simulation results=
-The number of n-n coincidences was a factor of 36 times greater than the number of n-crosstalk coincidences. n-n coincidence is defined as an event as two or more neutrons from the same fission registering a hit in two different detectors. If two neutrons are detected in coincidence, then that makes one n-n opening angle, three coincident neutrons makes three n-n opening angles, four neutrons makes six  opening angels.  and so on. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
+The number of n-n coincidences was a factor of 36 times greater than the number of n-crosstalk coincidences. n-n coincidence is defined as an event as two or more neutrons from the same fission registering a hit in two different detectors. If two neutrons are detected in coincidence, then that makes one n-n opening angle, three coincident neutrons makes three n-n opening angles, four neutrons makes six  opening angles.  and so on. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
 [[File:CrosstalkVScoincidence.png|750px]]

@@ Line 19: / Line 19: @@
 =Simulation results=
-The number of n-n coincidences was a factor of 30 times greater than the number of n-crosstalk coincidences. I have defined an n-n coincidence event as two or more neutrons from the same fission registering a hit in two different detectors. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
+The number of n-n coincidences was a factor of 36 times greater than the number of n-crosstalk coincidences. n-n coincidence is defined as an event as two or more neutrons from the same fission registering a hit in two different detectors. If two neutrons are detected in coincidence, then that makes one n-n opening angle, three coincident neutrons makes three n-n opening angles, four neutrons makes six  opening angels.  and so on. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
 [[File:CrosstalkVScoincidence.png|750px]]

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 An array of 6 detectors are placed radially at a distance of 1 meter from a correlated CF-252 source.  The image below shows a top down view of the simulation geometry. The detector setups have a vertical extent of 30".
-[[File:GeomEdited.png|750 px]]
+[[File:Crosstalkgeom2017.png|750 px]]
 =Simulation detector physics=

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 =Simulation results=
-The number of n-n coincidences was a factor of 30 times greater than the number n-crosstalk coincidences. I have defined an n-n coincidence event as two or more neutrons from the same fission registering a hit in two different detectors. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
+The number of n-n coincidences was a factor of 30 times greater than the number of n-crosstalk coincidences. I have defined an n-n coincidence event as two or more neutrons from the same fission registering a hit in two different detectors. An n-crosstalk coincidence event is defined as a singe source neutron (or any secondaries it produces) registering a hit in two different detectors.
 [[File:NnVSNCross.png|750px]]

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 =Simulation geometry=
-An array of 6 detectors are placed radially at a distance of 1 meter from a correlated 252-CF source.  The image below shows a top down view of the simulation geometry. The detector setups have a vertical extent of 30".
+An array of 6 detectors are placed radially at a distance of 1 meter from a correlated CF-252 source.  The image below shows a top down view of the simulation geometry. The detector setups have a vertical extent of 30".
 [[File:GeomEdited.png|750 px]]
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 The detector physics used in the simulation are MCNP-POLIMI's default treatment for plastic organic scintillators. POLIMI uses electron equivalent light output (MeVee) for simulating detector response. I assumed the detectors have a neutron energy deposition threshold of 0.2 MeV, giving an equivalent light output threshold of 0.03 MeVee.
-Neutron energy deposition from collisions with both hydrogen and carbon are converted to electron equivalent light output (MeVee). All neutron collisions that occur within a pulse collection time window of 10 ns of each other are converted to MeVee and summed. If the cumulative light output of a pulse exceeds the 0.03 MeVee threshold, then a detection is registered. The value 0.03 MeVee was chosen because it corresponds to a mean neutron energy deposit of 0.2 MeV. The detectors in the simulation had a 55% efficiency for detecting 252-CF neutrons.
+Neutron energy deposition from collisions with both hydrogen and carbon are converted to electron equivalent light output (MeVee). All neutron collisions that occur within a pulse collection time window of 10 ns of each other are converted to MeVee and summed. If the cumulative light output of a pulse exceeds the 0.03 MeVee threshold, then a detection is registered. The value 0.03 MeVee was chosen because it corresponds to a mean neutron energy deposit of 0.2 MeV. The detectors in the simulation had a 55% efficiency for detecting CF-252 neutrons.
 =Simulation source=