Thermal Neutron Point Source Imaging Using a Rotating Modulation Collimator
Language: English
Published by Creative Media Partners, LLC Okt 2012, 2012
- Softcover
- New
Seller: AHA-BUCH GmbH, Einbeck, GermanyAHA-BUCH GmbH
AbeBooks seller since August 14, 2006
Condition: New
£ 28.15
Quantity: 2 available
Add to basketItem description from seller
Neuware - This thesis demonstrates a previously untested capability of the Rotating Modulation Collimator (RMC) to image a point-like neutron source. The encouraging results, achieved using low-energy neutrons, provide motivation for further refinement and continued research with higher-energy neutrons. The detector and the masks on an existing RMC imaging system were exchanged to function with neutrons. The source in this research produced a poly-energetic spectrum of neutrons through the reaction. The source of alpha particles was a 72.7 mCi 239Pu source. The RMC detector was located 250 cm from the bare source and operated for three hours to generate a modulation profile: The number of particles detected at each rotation angle of the masks -- it is unique for each source location. The measured modulation profiles were used in a Maximum-Likelihood-Expectation-Maximization algorithm to reconstruct the images, and a Bootstrap resampling technique was used to determine uncertainty. The reconstructed images exhibited high contrast but low precision. The resampled image locations were widely distributed, but the most frequent value was very accurate. The uncertainty originated from an expectation model that did not account for fast neutron downscatter into the thermal neutron region as well as the fast neutrons streaming through the masks and being detected.…
Seller Inventory # 9781249588214
- Title
- Thermal Neutron Point Source Imaging Using a Rotating Modulation Collimator
- Author
- Nathan O Boyce
- Publisher
- Creative Media Partners, LLC Okt 2012
- Publication year
- 2012
- Condition
- Neu
- Binding
- Taschenbuch
- Language
- English
- ISBN 10
- 1249588219
- ISBN 13
- 9781249588214
- Item weight
- 159 grams
- Dimensions
- 234x156x6 mm
"Synopsis" may belong to another edition of this title.
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