Ion-induced gamma-ray detection of fast ions escaping from fusion plasmas
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561 (Japan)
- Graduate School of Science and Engineering, Doshisha University, Kyotanabe 610-0321 (Japan)
- Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022 (Japan)
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8654 (Japan)
- Furukawa Co. Ltd., Tsukuba, Ibaraki 305-0856 (Japan)
- National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
- Institute of Laser Engineering, Osaka University, Osaka 565-0871 (Japan)
- RIKEN SPring-8 center, RIKEN, Sayo, Hyogo 679-5148 (Japan)
- Tokushima Bunri University, Tokushima 770-8514 (Japan)
A 12 × 12 pixel detector has been developed and used in a laboratory experiment for lost fast-ion diagnostics. With gamma rays in the MeV range originating from nuclear reactions {sup 9}Be(α, nγ){sup 12}C, {sup 9}Be(d, nγ){sup 12}C, and {sup 12}C(d, pγ){sup 13}C, a high purity germanium (HPGe) detector measured a fine-energy-resolved spectrum of gamma rays. The HPGe detector enables the survey of background-gamma rays and Doppler-shifted photo peak shapes. In the experiments, the pixel detector produces a gamma-ray image reconstructed from the energy spectrum obtained from total photon counts of irradiation passing through the detector's lead collimator. From gamma-ray image, diagnostics are able to produce an analysis of the fast ion loss onto the first wall in principle.
- OSTI ID:
- 22308655
- Journal Information:
- Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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