Eikonal scattering cross section for electron-ion elastic collision in uniformly magnetized dense plasmas

摘要

Eikonal approximation is applied to investigate elastic electron-ion collisions in uniformly magnetized dense plasmas. Plasma screening effects on eikonal scattering cross sections for electron-ion elastic collisions in uniformly magnetized plasmas are also investigated. The electron-ion interaction potential in uniformly magnetized plasmas has been obtained by the introduction of the longitudinal plasma dielectric function. The straight-line trajectory method is applied to the path of the projectile electron in order to investigate the variation of the eikonal phase as a function of the impact parameter and plasma parameters. The eikonal differential elastic cross section substantially decreases with the decrease of the ratio of the projectile velocity (upsilon) to the electron thermal velocity (upsilon(T)). For a given velocity ratio, the eikonal cross section is decreased with the increase of the ratio of the electron thermal frequency (omega(T)) to the Larmor frequency (omega(B)). It is also found that the position of the maximum eikonal cross section is shifted to the ion core with the decrease in the velocity ratio (upsilon/upsilon(T)). (C) 2000 American Institute of Physics. [S1070-664X(00)03802-7]. [References: 19]