Randy Spaulding - Revision history

Oborn at 16:58, 21 September 2009

2009-09-21T16:58:55Z

2009-09-21T16:57:58Z

2009-09-21T16:55:05Z

2009-09-18T18:59:11Z

2009-09-15T22:53:21Z

2009-08-31T16:20:45Z

Abstract

2009-08-31T16:20:26Z

Abstract

2009-08-31T16:14:08Z

Abstract

2009-08-17T15:32:03Z

Chapter 2 : Environmental Effects

2009-08-17T15:30:40Z

Chapter 2 : Environmental Effects

← Older revision		Revision as of 16:58, 21 September 2009
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	Final Version (9/18/2009): [[File:RJS_Thesis.pdf]]		Final Version (9/18/2009): [[File:RJS_Thesis.pdf]]

−	Signature page: [[Image:~~RJS_Thesis_SigPage~~.pdf]]	+	Signature page: [[Image:RandySpaulding_Thesis_SigPage.pdf]]

← Older revision		Revision as of 16:57, 21 September 2009
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	Final Version (9/18/2009): [[File:RJS_Thesis.pdf]]		Final Version (9/18/2009): [[File:RJS_Thesis.pdf]]

−	Signature page: [[Image:~~RJS_Thesis_SignaturePage~~.pdf]]	+	Signature page: [[Image:RJS_Thesis_SigPage.pdf]]

← Older revision		Revision as of 16:55, 21 September 2009
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	Final Version (9/18/2009): [[File:RJS_Thesis.pdf]]		Final Version (9/18/2009): [[File:RJS_Thesis.pdf]]

−	Signature page: [[~~File~~:RJS_Thesis_SignaturePage.pdf]]	+	Signature page: [[Image:RJS_Thesis_SignaturePage.pdf]]

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 ----
-Final Version (9/15/2009): [[File:RJS_Thesis.pdf]]
+Final Version (9/18/2009): [[File:RJS_Thesis.pdf]]
 Signature page: [[File:RJS_Thesis_SignaturePage.pdf]]

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 A Neutron Detector Array
 [[Image:SpauldingThesis2009_V1.pdf]]
 =Abstract=

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 A semi-deterministic method for calculating detector
 responses to environmental neutron scattering, called efficacy, is used to quantify the performance of the new
-detector concept.  The goal of this thesis is to illustrate a detector design concept which minimizes the use of He-3.
+detector concept.  The goal of this thesis is to illustrate a detector design concept which minimizes the use of helium-3.
 =Chapter 1 Introduction=

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 where <math>\sigma</math> is the scattering cross-section and <math>n</math> is the number of particles per volume.  An environment composed of air at a density of 1.3 kg/m<math>^3</math> would be a mixture of several elements averaging to a molar mass of 28.97 g/mol and correspond to
 :<math>n =\left (\frac{1.3kg}{m^3} \right ) \left ( \frac{1 kmol}{28.97 kg}\right )\left ( \frac{6 \times 10^{26}particles}{kmol}\right )= 2.7 \times 10^{25} particles/m^3</math>.
-A 10 MeV neutron would travel \frac{m^3}{1 \times 10^{-28 m^2} 2.7 \times 10^{25} } = 1 km in air before interacting and a 1 MeV neutron would travel about 10 m.
+A 10 MeV neutron would travel \frac{m^3}{1 \times 10^{-28 m^2} 2.7 \times 10^{25} } = 1 km in air before interacting and a 1 MeV neutron would travel less than half that distance.
 This is particularly true for many active interrogation applications, where the scientist may have little control over the source and its environment.