Long-time diffusion in plasma turbulence with broad uniform spectrum

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860667· OSTI ID:7368818

Ishiharaa, O; Ha, H; Watanabe, S ^[1]

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1. Department of Electrical Engineering, Texas Tech University, Lubbock, Texas 79409-3102 (United States)

The long-time behavior of charged particles in plasma turbulence with uniform broad wave spectrum is studied numerically. The diffusivity of the particle velocity distribution is characterized by the quasilinear nature for extended time, while a transient diffusion precedes with the enhanced nonquasilinear diffusion rate when resonance overlapping is relatively weak. The observed long-time quasilinear diffusion coefficient eventually decreases due to the finiteness of the resonance region. The transient-type diffusion is revealed only by the higher-order numerical calculation.

• OSTI ID: 7368818
• Journal Information: Physics of Fluids B; (United States), Vol. 5:8; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGED PARTICLES
DIFFUSION
TURBULENCE
CORRELATION FUNCTIONS
NUMERICAL SOLUTION
RESONANCE
TEST PARTICLES
TRANSIENTS
TRANSPORT THEORY
FUNCTIONS
700340* - Plasma Waves
Oscillations
& Instabilities- (1992-)