Nonlinear gyrokinetic equations for low‐frequency electromagnetic waves in general plasma equilibria
作者:
E. A. Frieman,
Liu Chen,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1982)
卷期:
Volume 25,
issue 3
页码: 502-508
ISSN:0031-9171
年代: 1982
DOI:10.1063/1.863762
出版商: AIP
数据来源: AIP
摘要:
A nonlinear gyrokinetic formalism for low‐frequency (less than the cyclotron frequency) microscopic electromagnetic perturbations in general magnetic field configurations is developed. The nonlinear equations thus derived are valid in the strong‐turbulence regime and contain effects due to finite Larmor radius, plasma inhomogeneities, and magnetic field geometries. The specific case of axisymmetric tokamaks is then considered and a model nonlinear equation is derived for electrostatic drift waves. Also, applying the formalism to the shear Alfve´n wave heating scheme, it is found that nonlinear ion Landau damping of kinetic shear‐Alfve´n waves is modified, both qualitatively and quantitatively, by the diamagnetic drift effects. In particular, wave energy is found to cascade in wavenumber instead of frequency.
点击下载:
PDF
(487KB)
返 回