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

M. Nishiura, K. Doi, A. Taniike, T. Matsuki, K. Shimazoe, T. Mushiake, M. Yoshino, T. Nagasaka, Y. Fujimoto, K. Fujioka, T. Tanaka, M. Kisaki, H. Yamaoka, Y. Matsumoto, M. Wada

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1 Citation (Scopus)


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 9Be(α, nγ) 12C, 9Be(d, nγ)12C, and 12C(d, pγ)13C, 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.

Original languageEnglish
Article number11E804
JournalReview of Scientific Instruments
Issue number11
Publication statusPublished - 2014 Nov


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