VELOCITY SPACE DIFFUSION AND LANDAU DAMPING IN COLLISIONAL PLASMAS,
Abstract
The statistical behavior of a completely ionized plasma in which collisional effects are included is described by the Vlasov equation coupled to the Poisson equation, terms suggested by the Krook relaxation model and the isotropic Fokker-Planck model being chosen as collision operators. As a result of perturbations on the background distribution function, longitudinal oscillations are set up and the plasma diffuses in velocity space as a consequence of wave-particle interaction. The coupled equations are solved by the method of characteristics in the Fourier transformed space, employing the quasi-linear approximation developed by Drummond, Pines, Vendenov, Velikhov and Sagdeev. The longitudinal behavior of the plasma is followed into the quasi-linear regime in which both collisional and collisionless Landau damping and velocity space diffusion mechanisms are investigated. The rate of dissipation is shown to have collisionless as well as collisional attributes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1969
- Accession Number
- AD0696150
Entities
People
- Kwok-leung Li
- Norman C. Jen
Organizations
- City College of New York