The Modified Friction and Diffusion Coefficients of Fokker-Planck Equation and Relaxation Rates for Non-Maxwellian Scattering

Xiang  J; Li  D; Cai  HS

首页> 外文期刊>Plasma Science & Technology >The Modified Friction and Diffusion Coefficients of Fokker-Planck Equation and Relaxation Rates for Non-Maxwellian Scattering

【24h】

The Modified Friction and Diffusion Coefficients of Fokker-Planck Equation and Relaxation Rates for Non-Maxwellian Scattering

机译：The Modified Friction and Diffusion Coefficients of Fokker-Planck Equation and Relaxation Rates for Non-Maxwellian Scattering

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

In this paper, a new method to derive the Fokker-Planck coefficients defined by a non-Maxwellian velocity distribution function for the field particles is presented. The threefold integral and the new Debye cutoff parameter, which were introduced by CHANG and LI, are applied. Therefore, divergence difficulties and the customary replacement of relative velocity g by thermal velocity v(th) are naturally avoided. The probability function P(v,Delta v) for non-Maxwellian scattering is derived by the method of choosing velocity transfer Delta v, which is a true measure of collision intensity, as an independent variable. The method enables the difference between small-angle scattering and small-momentum-transfer collisions of the inverse-square force to be well clarified. With the help of the probability function, the Fokker-Planck coefficients are obtained by a normal original Fokker-Planck approach. The friction and diffusion coefficients of the Fokker-Planck equation are modified for non-Maxwellian scattering and are used to investigate the relaxation processes for the weakly coupled plasma. The profiles of the relaxation rates show that the slowing down and deflection processes are weakened in the conditions of non-Maxwellian scattering.

著录项

来源
《Plasma Science & Technology》 |2008年第6期|661-670|共10页
作者
Xiang J; Li D; Cai HS;
展开▼
作者单位

[Xiang, J;

Li, D;

Cai, HS] Univ Sci & Technol China, Sch Sci, CAS Key Lab Basic Plasma Phys, Hefei 230026, Peoples R China;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类物理学;
关键词
Fokker-Planck coefficients; non-Maxwellian velocity distribution; field particles velocity distribution; small-angle scattering; small-momentum-transfer collisions; ELECTRON-ENERGY DISTRIBUTIONS; INVERSE-SQUARE FORCE; THOMSON-SCATTERING; HEATED PLASMAS;

The Modified Friction and Diffusion Coefficients of Fokker-Planck Equation and Relaxation Rates for Non-Maxwellian Scattering

摘要

著录项

相关主题

期刊订阅