Enhancement in the Ionization Cross-Section of a 350 keV Hydrogen Beam on JT-60U Plasmas

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概要

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• Enhancement of the effective ionization cross-section has been investigated by shine-through measurements of a 350 keV hydrogen neutral beam on the JT-60U tokamak. The beam was injected into hydrogen plasmas with an electron density range of (1.0-4.1)×l0^19 m^-3 and an effective ionic charge of 1.3-2.2. Except for the low density region near 1×10^19 m^-3, the experimental shine-through (fraction of beam power not absorbed by the plasma) was remarkably smaller than predictions based on single-step ionization processes, suggesting that the effective ionization cross-section of the neutral beam was enhanced by multi-step ionization. The enhancement factor of the cross-section increased with electron density up to a maximum of 80%. It was shown that the experimental enhancement agreed with the theoretical predictions of Janev et al. [6] .

• 社団法人プラズマ・核融合学会の論文
• 1997-12-25

著者

• 牛草 健吉

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Kusama Y

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• NEMOTO Masahiro

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• TOBITA Kenji

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• USHIGUSA Kenkichi

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• KUSAMA Yoshinori

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• KURIYAMA Masaaki

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• KODAMA Kouzou

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• MASAKI Kei

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• SAKASAI Akira

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• KAMADA Yutaka

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

• 飛田 健次

  Naka Fusion Reseach Establishment Japan Atomic Energy Research Institute

• Tobita K

  Japan Atomic Energy Res. Inst. Ibaraki Jpn

• Tobita Kenji

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Sakasai A

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Sakasai Akira

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Kodama Kouzou

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Kamada Y

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Nemoto Masahiro

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Nemoto Masahiro

  Laboratory Of Beam Technology Technological University Of Nagaoka

• Kuriyama Masaaki

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Ushigusa Kenkichi

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• Kusama Yoshinori

  Naka Fusion Research Establishment Japan Atomic Energy Research Institute

• 根本 正博

  Naka Fusion Research Establishment, Japan Atomic Energy Research Institute

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