Study of mirror effect on scrape-off layer-divertor plasma based on a generalized fluid model incorporating ion temperature anisotropy

S. Togo, T. Takizuka, D. Reiser, Kazuo Hoshino, K. Ibano, Y. Li, Y. Ogawa, M. Sakamoto, N. Ezumi, Y. Nakashima

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The mirror effect on scrape-off layer (SOL)-divertor plasma profiles was studied by relaxing the assumption of homogeneous magnetic fields used in a one-dimensional (1D) plasma fluid model, which incorporates the anisotropic ion temperature. For collisionless plasmas, the perpendicular ion temperature proportional to the magnetic field strength is observed, which reflects the conservation of the magnetic moment. In diverging field cases, the plasma flow becomes supersonic, while it is kept subsonic in contracting field cases. Parallel momentum gains/losses and energy transfers between parallel and perpendicular components caused by the mirror effect are also observed. In addition, it is indicated that the viscous flux approximation is invalid in inhomogeneous magnetic fields regardless of the plasma collisionality.

Original languageEnglish
Pages (from-to)556-562
Number of pages7
JournalContributions to Plasma Physics
Volume58
Issue number6-8
DOIs
Publication statusPublished - 2018 Jul 1
Externally publishedYes

Keywords

  • mirror effect
  • SOL-divertor plasma fluid simulation
  • supersonic flow
  • temperature anisotropy

ASJC Scopus subject areas

  • Condensed Matter Physics

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