Accumulation process of high-Z impurity in toroidal rotating tokamak plasma

K. Hoshino, T. Takizuka, T. Nakano

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The accumulation process of high-Z impurity in toroidal rotating tokamak plasma is investigated. A new inward pinch of high-Z impurity due to the ionization/recombination processes is derived using an analytic model. This inward pinch is driven by the large deviation of a drift orbit from a magnetic surface and the resultant variation of the charge state along the drift orbit. The pinch velocity increases with increasing toroidal rotation speed in both the co-direction and the ctr-direction. The inward pinch expected by the analytic model is really observed in the numerical simulation using the IMPGYRO code.

Original languageEnglish
Pages (from-to)386-391
Number of pages6
JournalContributions to Plasma Physics
Volume50
Issue number3-5
DOIs
Publication statusPublished - 2010 May 1
Externally publishedYes

Keywords

  • Accumulation
  • High-Z impurity
  • Inward pinch

ASJC Scopus subject areas

  • Condensed Matter Physics

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