論文

査読有り
2013年7月

Impact of plasma rotation on the linear physics of resistive wall modes in tokamaks

PLASMA PHYSICS AND CONTROLLED FUSION
  • N. Aiba
  • ,
  • J. Shiraishi
  • ,
  • M. Hirota

55
7
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1088/0741-3335/55/7/074002
出版者・発行元
IOP PUBLISHING LTD

Rotation effects on the linear stability of the resistive wall mode (RWM) are investigated numerically based on the ideal magnetohydrodynamics (MHD) model. One topic is impact of poloidal rotation in a toroidally rotating plasma. Since the difference between mode frequency and rotation frequency is important to change the MHD stability by rotation, modulation of the Doppler-shifted frequency by poloidal rotation can play an important role even when the poloidal rotation velocity is significantly lower than the toroidal one. In addition, when poloidal rotation is fixed, the absolute value of the Doppler-shifted frequency relies on the direction of toroidal rotation, and hence, linear MHD stability can depend on this rotation direction. Such a dependence is sometimes observed experimentally. The other topic is the re-destabilization of the RWM by toroidal rotation in a reversed shear tokamak. Several numerical results imply that a candidate of this re-destabilized mode is a stable MHD eigenmode, which becomes unstable due to coupling with the RWM when rotation frequency is similar to the frequency of this stable eigenmode in a static equilibrium.

リンク情報
DOI
https://doi.org/10.1088/0741-3335/55/7/074002
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000320373200003&DestApp=WOS_CPL
ID情報
  • DOI : 10.1088/0741-3335/55/7/074002
  • ISSN : 0741-3335
  • Web of Science ID : WOS:000320373200003

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