Modeling of neutral transport in linear divertor plasma using first flight collision probability method

Akiyoshi Hatayama, Yuzo Fukai, Kawakami Yoshiyuki, Yamada Kazuhiro

研究成果: Article査読

1 被引用数 (Scopus)

抄録

A hybrid model of diffusion and first flight collision probability (FFCP) for two-dimensional (2-D) neutral transport has been developed to analyze neutral behavior in linear gas divertors. In the model, the axial transport of the neutrals is described by the diffusion approximation, while the FFCP model is applied to the radial neutral transport. The model is applied to the analysis of PISCES-A experiments for the model validation. Calculated density profiles of atomic and molecular hydrogen are qualitatively in good agreement with the experimental results. The molecular density sharply decreases near the ionization region where the electron density profile has the maximum. This sharp decrease in the molecular density leads to the atomic density peak. In addition, a sensitivity study of the wall reflection condition suggests that the wall recombination of atoms and the reemission as molecules are important processes to interpret the experimental results.

本文言語English
ページ(範囲)368-379
ページ数12
ジャーナルJournal of Nuclear Science and Technology
37
4
DOI
出版ステータスPublished - 2000 4月
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学

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