論文

査読有り
2017年4月

Impact of plasma parameter on self-organization of electron temperature gradient driven turbulence

Physics of Plasmas
  • C. Kawai
  • ,
  • Y. Idomura
  • ,
  • S. Maeyama
  • ,
  • Y. Ogawa

24
4
開始ページ
042303
終了ページ
042303
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1063/1.4980005
出版者・発行元
{AIP} Publishing

Self-organization in the slab electron temperature gradient driven (ETG) turbulence is investigated based on gyrokinetic simulations and the Hasegawa-Mima (HM) equation. The scale and the anisotropy of self-organized turbulent structures vary depending on the Rhines scale and the characteristic scale given by the adiabatic response term in the HM equation. The former is determined by competition between the linear wave dispersion and the nonlinear turbulent cascade, while the latter is given as the scale, at which the turbulent cascade is impeded. These scales are controlled by plasma parameters such as the density and temperature gradient, and the temperature ratio of ion to electron. It is found that depending on the plasma parameters, the ETG turbulence shows either isotropic turbulence or zonal flows, which give significantly different transport levels. Although the modulational instability excites zonal modes regardless of the plasma parameters, the final turbulent structure is determined by the self-organization process. Published by AIP Publishing.

Web of Science ® 被引用回数 : 2

リンク情報
DOI
https://doi.org/10.1063/1.4980005
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000400390700037&DestApp=WOS_CPL
ID情報
  • DOI : 10.1063/1.4980005
  • ISSN : 1070-664X
  • eISSN : 1089-7674
  • ORCIDのPut Code : 36601070
  • Web of Science ID : WOS:000400390700037

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