摘要
Based on the covariant Lagrangian function and Euler-Lagrange equation,a set of classical fluid equations for strong EM wave-spin plasma interaction is derived.Analysis shows that the relativistic effects may affect the interaction processes by three factors:the relativistic factor,the time component of four-spin,and the velocity-field coupling.This set of equations can be used to discuss the collective spin effects of relativistic electrons in classical regime,such as astrophysics,high-energy laser-plasma systems and so on.As an example,the spin induced ponderomotive force in the interaction of strong EM wave and magnetized plasma is investigated.Results show that the time component of four-spin,which approaches to zero in nonrelativistic situations,can increase the spin-ponderomotive force obviously in relativistic situation.
作者
胡强林
胡文
Qianglin HU;Wen HU(Department of Physics,Jinggangshan University,Ji'an 343009,People's Republic of China)
基金
supported by National Natural Science Foundation of China(No.12065011)
Science and Technology Research Project of Jiangxi Provincial Department of Education(No.GJJ170642)。