Investigation of interaction between MeV-ions and first wall from neutron and γ-ray measurements in JT-60U

T. Kondoh, Y. Kusama, H. Kimura, M. Saigusa, T. Fujii, S. Moriyama, M. Nemoto, K. Tobita, A. Morioka, K. Nagashima, T. Nishitani

Research output: Contribution to journalConference article

10 Citations (Scopus)

Abstract

Loss of MeV-energy protons to the first wall during H-minority second harmonic ion cyclotron range of frequency (ICRF) heating has been measured for the first time by neutron signals emitted by 11B(p,n)11C reaction in B4C coated divertor tiles and boronized tiles in the JT-60U tokamak. Since the reaction has a threshold energy of 3.0 MeV, the neutron signal indicates loss of fast protons whose energy is more than 3 MeV. Measurements of gamma-ray lines emitted from reaction between the fast protons and plasma impurities are also used for measurements of confined protons accelerated up to 5 MeV.

Original languageEnglish
Pages (from-to)564-568
Number of pages5
JournalJournal of Nuclear Materials
Volume241-243
DOIs
Publication statusPublished - 1997 Feb 2
EventProceedings of the 1996 12th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Saint-Raphael, Fr
Duration: 1996 May 201996 May 24

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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    Kondoh, T., Kusama, Y., Kimura, H., Saigusa, M., Fujii, T., Moriyama, S., Nemoto, M., Tobita, K., Morioka, A., Nagashima, K., & Nishitani, T. (1997). Investigation of interaction between MeV-ions and first wall from neutron and γ-ray measurements in JT-60U. Journal of Nuclear Materials, 241-243, 564-568. https://doi.org/10.1016/S0022-3115(96)00565-X