Reversal of in-out asymmetry of the particle-recycling associated with X-point MARFE and plasma detachment

A. Hatayama, H. Segawa, N. Komatsu, R. Schneider, D. P. Coster, N. Hayashi, S. Sakurai, N. Asakura

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Reversal of in-out asymmetry of the particle recycling in tokamak divertor regions and its physical mechanism have been studied. Numerical calculations by the `B2-EIRENE' code have been done for the JT-60U open divertor geometry. The following two cases, nD = 1.0×1019 m-3 and nD = 2.0×1019 m-3 for the D+ ion density at the core interface boundary, have been calculated. In the high-density case, typical behaviors of X-point MARFE and plasma detachment have been observed. In addition, asymmetry of the particle recycling between the inner and the outer divertor regions is reversed in comparison with the low-density case. The difference of the electron temperature between the inner and the outer regions together with the Te-dependence of the ionization rate coefficient is shown to be a possible cause of the reversal of the recycling source. Also, the difference of pressure loss between two regions plays a key role in the in-out asymmetry of the particle flux at the plate.

本文言語English
ページ(範囲)407-412
ページ数6
ジャーナルJournal of Nuclear Materials
290-293
DOI
出版ステータスPublished - 2001 3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
  • 材料科学一般
  • 原子力エネルギーおよび原子力工学

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