Coulomb-Collision Corrected Electron-Plasma Line Profiles

概要

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Complete profiles of Coulomb-collision corrected electron-plasma line including both electron-ion (e-i) and electron-electron (e-e) collisions have been computed. The line profiles are presented graphically for specific experimental conditions and are compared to those obtained from collision less plasma theory. It is seen that in the collision-dominated regime the electron-ion collisions play an important role while in the transition regime the electron-electron collisions control the damping of the plasma line. In both cases, collisions broaden the line-width significantly over the Landau (collisionless) width while the peak is compensatingly reduced such that the integrated line intensity remains constant. In addition, the resonance frequency is found to be shifted toward higher frequencies due to the effect of Coulomb collisions while the line-shape remains approximately Lorenzian. Possible experimental conditions wherein these Coulomb collisional effects may be observed by light scattering techniques are discussed.
社団法人日本物理学会の論文
1973-06-05