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21 December 2001 High-spatial-resolution imaging system for high-energy neutrons in inertial confinement fusion experiments
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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Proceedings Volume 4510, Charged Particle Detection, Diagnostics, and Imaging; (2001) https://doi.org/10.1117/12.451262
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States
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.
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Olivier Delage, Tao Le, Nicolas Dague, Henri H. Arsenault, Richard A. Lerche, Thomas Craig Sangster, Nobuhiko Izumi, Paul A. Jaanimagi, and Ray K. Fisher "High-spatial-resolution imaging system for high-energy neutrons in inertial confinement fusion experiments", Proc. SPIE 4510, Charged Particle Detection, Diagnostics, and Imaging, (21 December 2001); https://doi.org/10.1117/12.451262
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KEYWORDS
Sensors
Scintillators
Imaging systems
Spatial resolution
Image fusion
Image resolution
Image segmentation
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