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Title: Ion-induced gamma-ray detection of fast ions escaping from fusion plasmas

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.
Authors:
;  [1] ; ;  [2] ; ;  [3] ;  [4] ;  [5] ; ; ;  [6] ; ;  [7] ;  [8] ;  [9]
  1. Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561 (Japan)
  2. Graduate School of Science and Engineering, Doshisha University, Kyotanabe 610-0321 (Japan)
  3. Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022 (Japan)
  4. Graduate School of Engineering, The University of Tokyo, Tokyo 113-8654 (Japan)
  5. Furukawa Co. Ltd., Tsukuba, Ibaraki 305-0856 (Japan)
  6. National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
  7. Institute of Laser Engineering, Osaka University, Osaka 565-0871 (Japan)
  8. RIKEN SPring-8 center, RIKEN, Sayo, Hyogo 679-5148 (Japan)
  9. Tokushima Bunri University, Tokushima 770-8514 (Japan)
Publication Date:
OSTI Identifier:
22308655
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALPHA DETECTION; BERYLLIUM 9; CARBON 12; COLLIMATORS; DEUTERON REACTIONS; DOPPLER EFFECT; ENERGY SPECTRA; FIRST WALL; GAMMA DETECTION; GAMMA RADIATION; HIGH-PURITY GE DETECTORS; MEV RANGE; PHOTONS; PLASMA