Impact of the toroidal rotation on the n dependence of the growth rate of the edge localized MHD modes

N. Aiba, M. Hirota

研究成果: Conference contribution

抄録

In this paper, we investigate the dependence of the stability of the edge localized MHD mode on the toroidal mode number n with the MINERVA code. Unlike in the static case, the sheared toroidal rotation can induce the non-exponential growth of the MHD instability, and the growth rate oscillates in time. This oscillation is excited by the beat between two unstable eigenmodes whose growth rates are almost identical to but frequencies are different from each other. Due to the declination of the plasma rotation frequency at the peak of the envelope of the eigenmode structure, the frequencies of the eigenmodes become different from each other. The reason that makes such a difference of the peak position of the envelope is still under discussion, but this will come from the difference between the position where the ballooning mode can have the largest growth rate and that where the rotation can change the MHD stability effectively. This will be investigated and will be reported in near future.

本文言語English
ホスト出版物のタイトル37th EPS Conference on Plasma Physics 2010, EPS 2010
ページ1142-1145
ページ数4
出版ステータスPublished - 2010 12 1
外部発表はい
イベント37th EPS Conference on Plasma Physics 2010, EPS 2010 - Dublin, Ireland
継続期間: 2010 6 212010 6 25

出版物シリーズ

名前37th EPS Conference on Plasma Physics 2010, EPS 2010
2

Other

Other37th EPS Conference on Plasma Physics 2010, EPS 2010
CountryIreland
CityDublin
Period10/6/2110/6/25

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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