Quasilinear theory for inhomogeneous plasma
Quasilinear theory for inhomogeneous plasma
复制标题
非均匀等离子体的拟线性理论
DOI:
10.1017/s0022377822000502
复制
发表时间:
2022
影响因子:
2.5
通讯作者:
Dodin, I.Y.
中科院分区:
文献类型:
--
作者:
Dodin, I.Y.
This paper presents quasilinear theory (QLT) for a classical plasma interacting with inhomogeneous turbulence. The particle Hamiltonian is kept general; for example, relativistic, electromagnetic and gravitational effects are subsumed. A Fokker–Planck equation for the dressed ‘oscillation-centre’ distribution is derived from the Klimontovich equation and captures quasilinear diffusion, interaction with the background fields and ponderomotive effects simultaneously. The local diffusion coefficient is manifestly positive-semidefinite. Waves are allowed to be off-shell (i.e. not constrained by a dispersion relation), and a collision integral of the Balescu–Lenard type emerges in a form that is not restricted to any particular Hamiltonian. This operator conserves particles, momentum and energy, and it also satisfies the -theorem, as usual. As a spin-off, a general expression for the spectrum of microscopic fluctuations is derived. For on-shell waves, which satisfy a quasilinear wave-kinetic equation, the theory conserves the momentum and energy of the wave–plasma system. The action of non-resonant waves is also conserved, unlike in the standard version of QLT. Dewar's oscillation-centre QLT of electrostatic turbulence (Phys. Fluids, vol. 16, 1973, p. 1102) is proven formally as a particular case and given a concise formulation. Also discussed as examples are relativistic electromagnetic and gravitational interactions, and QLT for gravitational waves is proposed.
登录
查看更多内容
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
F. Yasseen;J. Václavík
通讯作者:
J. Václavík
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
D. E. Ruiz
通讯作者:
D. E. Ruiz
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
E. Weibel;J. Václavík
通讯作者:
J. Václavík
DOI:
10.1063/1.860030
发表时间:
1992
期刊:
Physics of fluids. B, Plasma physics
影响因子:
--
作者:
H. Ye;A. Kaufman
通讯作者:
A. Kaufman
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
D. E. Ruiz;I. Dodin
通讯作者:
I. Dodin