Locking of magnetic island rotation by static error field

S. Nishimura, M. Yagi, K. Itoh, S. I. Itoh, S. Benkadda

研究成果: ジャーナルへの寄稿学術誌査読

9 被引用数 (Scopus)

抄録

The drift-tearing mode is nonlinearly simulated, using a reduced set of two-fluid equations and locking of magnetic island rotation by a static error field is investigated. Detailed analysis shows that Maxwell stress and ion viscosity play important roles in the locking process. In the locked state, it is found that contributions of E × B flow and electron diamagnetic flow cancel each other inside a magnetic island. A low dimensional model describing the locking process of a rotating magnetic island is derived, based on nonlinear simulation results. It is clarified that a coupling between trapping by an error field and damping by ion viscosity is essential. The dynamics of a rotating magnetic island is shown to be understood by analogy with the damping process of pendulum motion in a gravity field.

本文言語英語
論文番号054007
ジャーナルNuclear Fusion
50
5
DOI
出版ステータス出版済み - 2010

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学

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