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Title: Method for improving the angular resolution of a neutron scatter camera

Abstract

An instrument that will directly image the fast fission neutrons from a special nuclear material source wherein the neutron detection efficiency is increased has been described. Instead of the previous technique that uses a time-of-flight (TOF) between 2 widely spaced fixed planes of neutron detectors to measure scatter neutron kinetic energy, we now use the recoil proton energy deposited in the second of the 2 scatter planes which can now be repositioned either much closer together or further apart. However, by doubling the separation distance between the 2 planes from 20 cm to a distance of 40 cm we improved the angular resolution of the detector from about 12.degree. to about 10.degree.. A further doubling of the separation distance to 80 cm provided an addition improvement in angular resolution of the detector to about 6.degree. without adding additional detectors or ancillary electronics. The distance between planes also may be dynamically changed using a suitable common technique such as a gear- or motor-drive to toggle between the various positions. The angular resolution of this new configuration, therefore, is increased at the expanse of detection sensitivity. However, the diminished sensitivity may be acceptable for those applications where the detector is able tomore » interrogate a particular site for an extended period.« less

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1082134
Patent Number(s):
8,338,795
Application Number:
12/872,700
Assignee:
Sandia Corporation (Albuquerque, NM)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Mascarenhas, Nicholas, Marleau, Peter, Gerling, Mark, Cooper, Robert Lee, Mrowka, Stanley, and Brennan, James S. Method for improving the angular resolution of a neutron scatter camera. United States: N. p., 2012. Web.
Mascarenhas, Nicholas, Marleau, Peter, Gerling, Mark, Cooper, Robert Lee, Mrowka, Stanley, & Brennan, James S. Method for improving the angular resolution of a neutron scatter camera. United States.
Mascarenhas, Nicholas, Marleau, Peter, Gerling, Mark, Cooper, Robert Lee, Mrowka, Stanley, and Brennan, James S. Tue . "Method for improving the angular resolution of a neutron scatter camera". United States. https://www.osti.gov/servlets/purl/1082134.
@article{osti_1082134,
title = {Method for improving the angular resolution of a neutron scatter camera},
author = {Mascarenhas, Nicholas and Marleau, Peter and Gerling, Mark and Cooper, Robert Lee and Mrowka, Stanley and Brennan, James S.},
abstractNote = {An instrument that will directly image the fast fission neutrons from a special nuclear material source wherein the neutron detection efficiency is increased has been described. Instead of the previous technique that uses a time-of-flight (TOF) between 2 widely spaced fixed planes of neutron detectors to measure scatter neutron kinetic energy, we now use the recoil proton energy deposited in the second of the 2 scatter planes which can now be repositioned either much closer together or further apart. However, by doubling the separation distance between the 2 planes from 20 cm to a distance of 40 cm we improved the angular resolution of the detector from about 12.degree. to about 10.degree.. A further doubling of the separation distance to 80 cm provided an addition improvement in angular resolution of the detector to about 6.degree. without adding additional detectors or ancillary electronics. The distance between planes also may be dynamically changed using a suitable common technique such as a gear- or motor-drive to toggle between the various positions. The angular resolution of this new configuration, therefore, is increased at the expanse of detection sensitivity. However, the diminished sensitivity may be acceptable for those applications where the detector is able to interrogate a particular site for an extended period.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {12}
}

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