Performance of THGEM as a Neutron Detector - Revision history

Foretony: /* Simulation and Analysis */

2015-04-09T20:52:27Z

Simulation and Analysis

Foretony: /* Simulation and Analysis */

2015-04-08T19:48:53Z

Simulation and Analysis

Abdehait: /* Simulation and Analysis */

2015-04-08T01:33:50Z

Simulation and Analysis

Abdehait: /* Alpha, electrons, photons ionization */

2015-04-02T14:53:12Z

Alpha, electrons, photons ionization

Abdehait: /* Alpha, electrons, photons ionization */

2015-04-02T14:52:44Z

Alpha, electrons, photons ionization

Abdehait: /* Alpha, electrons, photons ionization */

2015-01-16T04:26:51Z

Alpha, electrons, photons ionization

Abdehait: /* Alpha, electrons, photons ionization */

2015-01-16T04:26:40Z

Alpha, electrons, photons ionization

Abdehait: /* Alpha, electrons, photons ionization */

2014-12-28T18:23:09Z

Alpha, electrons, photons ionization

Abdehait: /* Simulation and Analysis */

2014-12-28T18:22:42Z

Simulation and Analysis

Abdehait: /* Simulation and Analysis */

2014-03-27T14:30:32Z

Simulation and Analysis

@@ Line 128: / Line 128: @@
 =Simulation and Analysis=
-The interactions of \alpha, \beta, \gamma, and fission fragments within the gas volume of the GEM detector were simulated using a Monte Carlo program known as GEANT4 [insert G4 reference]
+The interactions of \alpha, \beta, \gamma, and fission fragments within the gas volume of the GEM detector were simulated using a Monte Carlo program known as GEANT4 [insert G4 reference] to interpret the detector's signal.
-The previous chapters of this work discussed a number of important theories that justify the physical processes which occurred in the detector, such as induced neutron fission, ionization, diffusion. Using the appropriate software,  their simulations are important to have an accurate analysis for the detector performance, when the simulations consider all the the experimental constraints, they lead to a good assessment for the experimental measurements.
+Chapter X describes the theory of the interaction that may occur. of this work discussed a number of important theories that justify the physical processes which occurred in the detector, such as induced neutron fission, ionization, diffusion. Using the appropriate software,  their simulations are important to have an accurate analysis for the detector performance, when the simulations consider all the the experimental constraints, they lead to a good assessment for the experimental measurements.
 Installing U-233 to build a fission chamber  allows more than one type of particles to charge the QDC. U-233 coating emits  alpha, beta or gamma particles, they travel through the drift region with a specific energy, those particles loss energy which mostly leads to gas ionization. The same case for the detector  exposure to a neutron flux, a fission fragment passes through the drift region, and ionizes the gas. The QDC charge spectrum may represent the ionization of either one or more than one particle without specifying the source of the charge, so it is important to study the ionization simulation to distinguish the estimated charge for each particle.

@@ Line 128: / Line 128: @@
 =Simulation and Analysis=
-The physical processes occurrence  inside the detector were studied thoroughly using Monte Carlo simulations.The previous chapters of this work discussed a number of important theories that justify the physical processes which occurred in the detector, such as induced neutron fission, ionization, diffusion. Using the appropriate software,  their simulations are important to have an accurate analysis for the detector performance, when the simulations consider all the the experimental constraints, they lead to a good assessment for the experimental measurements.
+The interactions of \alpha, \beta, \gamma, and fission fragments within the gas volume of the GEM detector were simulated using a Monte Carlo program known as GEANT4 [insert G4 reference]
 Installing U-233 to build a fission chamber  allows more than one type of particles to charge the QDC. U-233 coating emits  alpha, beta or gamma particles, they travel through the drift region with a specific energy, those particles loss energy which mostly leads to gas ionization. The same case for the detector  exposure to a neutron flux, a fission fragment passes through the drift region, and ionizes the gas. The QDC charge spectrum may represent the ionization of either one or more than one particle without specifying the source of the charge, so it is important to study the ionization simulation to distinguish the estimated charge for each particle.

@@ Line 128: / Line 128: @@
 =Simulation and Analysis=
-Existence of U-233 in the gas chamber is source of ionization that produces the collected signal by the trigout. The existence of the U-233 inside the gas chamber produces alpha, beta that are emitted from the radioactive nucleus, these particles cause primary and secondary ionization if they are a part of an interaction that emits other particles like free electrons and photons that can also cause ionization.
+The physical processes occurrence  inside the detector were studied thoroughly using Monte Carlo simulations.The previous chapters of this work discussed a number of important theories that justify the physical processes which occurred in the detector, such as induced neutron fission, ionization, diffusion. Using the appropriate software,  their simulations are important to have an accurate analysis for the detector performance, when the simulations consider all the the experimental constraints, they lead to a good assessment for the experimental measurements.
-The neutrons are also another source of ionization if the detector is in a radiation rich environment such as a linear accelerator. The detector has been tested in an accelerator environment, such an environment may produce up to <math> 10^{14} </math> neutron/s if it has a Tungsten target of thickness of 3cm, and 15 MeV electron flux of <math> 10^9</math> electron/s <ref name= "Wasilewski"> Wasilewski, A. A. (2005). The neutron source generated with electron linear accelerator; theoretical calculations. Annual Report, 192, 1. Retrieved from http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/37/084/37084478.pdf</ref>. When a neutron interacts with the U-233 nucleus, a fission reaction occurs and produces back to back  fission fragments, one them at least will cause an ionization in the medium to produce a signal.
+Installing U-233 to build a fission chamber  allows more than one type of particles to charge the QDC. U-233 coating emits  alpha, beta or gamma particles, they travel through the drift region with a specific energy, those particles loss energy which mostly leads to gas ionization. The same case for the detector  exposure to a neutron flux, a fission fragment passes through the drift region, and ionizes the gas. The QDC charge spectrum may represent the ionization of either one or more than one particle without specifying the source of the charge, so it is important to study the ionization simulation to distinguish the estimated charge for each particle.
-The aim of the simulation is to estimate the number of electrons produced by from the fission fragments, and all the other particles that can cause an ionization in the medium. GEANT4 and Garfield software packages are going to be used to estimate the produced charge in the drift area of the GEM detector.
+The aim of this chapter is to present the simulation analysis that estimates the initial charge of each particle that is deposited in the gas, with and without the effect of an FR4 shutter. When an ionizing particle or a fission fragment passes through the drift region, there is an effect on their initial charge depending on the  detector's shutter position. As mentioned previously, the detector modified structure has a shutter that is used to cover  U-233 coating area, so it stops (or partially stops) all the positively charged ions when it is closed, and allows those ions to pass through the gas when it is open. The next sections will discuss the steps for simulating the ionization to estimate the magnitude of the initial charge to compare it to the QDC charge spectrum measurements.
 ===Alpha, electrons, photons ionization ===

@@ Line 145: / Line 145: @@
 [[Beta Transmission  and Ionization]]
-[[Gamma Emissio]]
+[[Gamma Emission]]
 =Data Analysis=

← Older revision		Revision as of 14:52, 2 April 2015
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	[[Beta Transmission and Ionization]]		[[Beta Transmission and Ionization]]
		+
		+	[[Gamma Emissio]]

	=Data Analysis=		=Data Analysis=

← Older revision		Revision as of 04:26, 16 January 2015
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	[[Alpha Ionization]]		[[Alpha Ionization]]
		+
	[[Beta Transmission and Ionization]]		[[Beta Transmission and Ionization]]

@@ Line 139: / Line 139: @@
 # Using GEANT4 for estimating the number delta electrons by firing an Alpha in Ar/CO2 gas.
-==Alpha, electrons, photons ionization ==
+===Alpha, electrons, photons ionization ===
 [[Alpha Ionization]]

← Older revision		Revision as of 14:30, 27 March 2014
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	[[Alpha Ionization]]		[[Alpha Ionization]]
−
−	~~[[ Photon Ionization]]~~

	=Data Analysis=		=Data Analysis=