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Proceedings Paper

High-spatial-resolution imaging system for high-energy neutrons in inertial confinement fusion experiments
Author(s): Olivier Delage; Tao Le; Nicolas Dague; Henri H. Arsenault; Richard A. Lerche; Thomas Craig Sangster; Nobuhiko Izumi; Paul A. Jaanimagi; Ray K. Fisher
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Paper Abstract

The penumbral imaging technique has proven to be ideally suited for neutron imaging. The French CEA has successfully installed a neutron imaging system at the LLE (Rochester-New York) in June 2000. Images of the 14MeV fusion neutrons produced in the target have been recorded in the range 1012 to 1014 with a two-point resolution of 45 micrometers. The detector used was a 15cm diameter circular array composed of plastic scintillator elements. For several of the CEA experiments, bubble detectors developed for General Atomics simultaneously recorded neutron images. The SIRINC (Simulation and Reconstruction Imaging Neutron Code) code has been used to unfold neutron images obtained both with the segmented scintillator detector and with the bubble detector. We first describe the experimental setup and detector designs, then compare the sensitivity, quantity of information, and signal to noise ratio for those two detectors. Then raw and unfolded images are presented. The spatial resolution obtained for the unfolded images are estimated and compared for the two detectors types.

Paper Details

Date Published: 21 December 2001
PDF: 9 pages
Proc. SPIE 4510, Charged Particle Detection, Diagnostics, and Imaging, (21 December 2001); doi: 10.1117/12.451262
Show Author Affiliations
Olivier Delage, Commissariat a l'Energie Atomique (France)
Tao Le, Commissariat a l'Energie Atomique (France)
Nicolas Dague, Commissariat a l'Energie Atomique (France)
Henri H. Arsenault, Univ. Laval (Canada)
Richard A. Lerche, Lawrence Livermore National Lab. (United States)
Thomas Craig Sangster, Lawrence Livermore National Lab. (United States)
Nobuhiko Izumi, Lawrence Livermore National Lab. (United States)
Paul A. Jaanimagi, Univ. of Rochester (United States)
Ray K. Fisher, General Atomics (United States)

Published in SPIE Proceedings Vol. 4510:
Charged Particle Detection, Diagnostics, and Imaging
Eric Munro; John A. Rouse, Editor(s)

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