A structural bifurcation of transport in toroidal plasmas

K. Itoh, S. I. Itoh

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

The mechanism of structure formation in plasmas, which is caused by the nonlinear link between the radial electric field, pressure gradient and turbulent fluctuations, is investigated. The suppression of turbulence by the shear and curvature of an inhomogeneous radial electric field is taken into account. The case of L-mode plasmas, where zonal flows are not excited, is studied. The 1D structure is investigated, and the stationary state under a given heat flux (constant in space and time) is analysed. It is shown that the effect of electric field curvature causes structural bifurcation from a state of a constant gradient to a state with a spatially corrugated gradient. The relationship between the period and amplitude of the corrugation is obtained. The electric field shear alone does not lead to such a structural bifurcation.

本文言語英語
論文番号045017
ジャーナルPlasma Physics and Controlled Fusion
58
4
DOI
出版ステータス出版済み - 2 19 2016

All Science Journal Classification (ASJC) codes

  • 原子力エネルギーおよび原子力工学
  • 凝縮系物理学

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