中国物理B ›› 2004, Vol. 13 ›› Issue (6): 898-904.doi: 10.1088/1009-1963/13/6/020

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Study of electron temperature gradient instability in toroidal plasmas with negative magnetic shear

简广德, 董家齐   

  1. Southwestern Institute of Physics, Chengdu 610041, China
  • 收稿日期:2003-09-23 修回日期:2004-02-06 出版日期:2005-07-05 发布日期:2005-07-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10135020).

Study of electron temperature gradient instability in toroidal plasmas with negative magnetic shear

Jian Guang-De (简广德), Dong Jia-Qi (董家齐)   

  1. Southwestern Institute of Physics, Chengdu 610041, China
  • Received:2003-09-23 Revised:2004-02-06 Online:2005-07-05 Published:2005-07-05
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10135020).

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摘要： Electron temperature gradient driven instability in toroidal plasmas with negative magnetic shear is studied. Full electron kinetics is considered, and the behaviours of the modes and corresponding turbulent transport in the parameter regimes close to the instability threshold are emphasized. Growing and damped modes are both investigated. The singular points of the integrand are disposed of, and the fitting formulae for the critical gradient are given. The theoretical results are shown to be close to the experimental observations.

Abstract: Electron temperature gradient driven instability in toroidal plasmas with negative magnetic shear is studied. Full electron kinetics is considered, and the behaviours of the modes and corresponding turbulent transport in the parameter regimes close to the instability threshold are emphasized. Growing and damped modes are both investigated. The singular points of the integrand are disposed of, and the fitting formulae for the critical gradient are given. The theoretical results are shown to be close to the experimental observations.

Key words: electron temperature gradient instability, critical gradient, negative magnetic shear

中图分类号:  (Tokamaks, spherical tokamaks)

  • 52.55.Fa
52.25.Fi (Transport properties) 52.35.Ra (Plasma turbulence) 52.25.Dg (Plasma kinetic equations) 52.35.Py (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)) 52.25.Xz (Magnetized plasmas) 52.65.-y (Plasma simulation)