Effect of turbulent collisions on diffusion in stationary plasma turbulence

Author

Xia, Hua ; Ishihara, O.

fYear

1990

fDate

21-23 May 1990

Firstpage

83

Abstract

Summary form only given. Recently, the authors (1989) studied the velocity diffusion process using the generalized Langevin equation derived by the projection operator method. Further study shows that the retarded frictional function plays an important role in suppressing particle diffusion in the velocity space in stronger turbulence. A theoretical formulation is presented for the retarded frictional effect, produced by the effective collisions due to the plasma turbulence. A test particle numerical experiment for Langmuir turbulence was carried out to test the theory. In stronger turbulence, a deviation of the diffusion rate from the one predicted by both the quasilinear and the extended resonance theories has been observed, and it is explained qualitatively by the present formulation

Keywords

plasma collision processes; plasma transport processes; plasma turbulence; Langmuir turbulence; diffusion; diffusion rate; effective collisions; extended resonance theories; generalized Langevin equation; particle diffusion; projection operator method; quasilinear theory; retarded frictional function; stationary plasma turbulence; test particle numerical experiment; turbulent collisions; velocity diffusion process; velocity space;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 1990. IEEE Conference Record - Abstracts., 1990 IEEE International Conference on

Conference_Location

Oakland, CA, USA

Type

conf

DOI

10.1109/PLASMA.1990.110504

Filename

5725782