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This content will become publicly available on September 22, 2018

Title: A Spherical Active Coded Aperture for 4π Gamma-ray Imaging

Gamma-ray imaging facilitates the efficient detection, characterization, and localization of compact radioactive sources in cluttered environments. Fieldable detector systems employing active planar coded apertures have demonstrated broad energy sensitivity via both coded aperture and Compton imaging modalities. But, planar configurations suffer from a limited field-of-view, especially in the coded aperture mode. In order to improve upon this limitation, we introduce a novel design by rearranging the detectors into an active coded spherical configuration, resulting in a 4pi isotropic field-of-view for both coded aperture and Compton imaging. This work focuses on the low- energy coded aperture modality and the optimization techniques used to determine the optimal number and configuration of 1 cm 3 CdZnTe coplanar grid detectors on a 14 cm diameter sphere with 192 available detector locations.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [3]
  1. Univ. of California, Berkeley, CA (United States). Nculear Engineering Dept.
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Applied Nuclear Physics Program
  3. Univ. of California, Berkeley, CA (United States). Nculear Engineering Dept. ; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Applied Nuclear Physics Program
Publication Date:
Grant/Contract Number:
NA0003180; DTRA10027-19346
Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Nuclear Science
Additional Journal Information:
Journal Volume: 64; Journal Issue: 11; Journal ID: ISSN 0018-9499
Publisher:
IEEE
Research Org:
Univ. of California, Berkeley, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; active coded aperture; gamma-ray imaging; spherical coded aperture; 4pi image reconstruction
OSTI Identifier:
1392979