Fokker-Planck equation for moderately coupled plasmas
1993; American Physical Society; Volume: 70; Issue: 20 Linguagem: Inglês
10.1103/physrevlett.70.3063
ISSN1092-0145
Autores Tópico(s)Dust and Plasma Wave Phenomena
ResumoA Fokker-Planck equation has been generalized to treat large-angle as well as small-angle binary collisions in plasmas. For moderately coupled plasmas [2\ensuremath{\lesssim} Coulomb logarithm (ln${\mathrm{\ensuremath{\Lambda}}}_{\mathit{b}}$)\ensuremath{\lesssim}10], calculations have been made of the relaxation rates and transport coefficients. In general they differ from the standard (Braginskii) results by terms of order 1/ln${\mathrm{\ensuremath{\Lambda}}}_{\mathit{b}}$. Using a modified collision operator, a new vector potential that has a direct and practical connection to the Rosenbluth potentials is obtained. In addition, we calculate a reduced electron-ion collision operator that, for the first time, manifests the 1/ln${\mathrm{\ensuremath{\Lambda}}}_{\mathit{b}}$ corrections.
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