Damping of large-amplitude plasma waves in a collisionless plasma

Journal Article · Mon Sep 01 04:00:00 EDT 1980 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:6027617

Buchel'nikova, N S; Matochkin, E P

The damping of one-dimensional plasma waves is studied over a broad range of initial parameters (E/sub 0/ /sup 2//8..pi..nTapprox.3 x 10/sup -4/--10/sup 2/, ..nu../sub f//..nu../sub T/approx.2.5--20, ephi/sub 0//Tapprox.4 x 10/sup -2/--4 x 10/sup 2/) through numerical simulation (by the ''particle-in-cell'' method) with fixed ions. When ephi/sub 0//T< or approx. =1, the damping is described by the Landau damping rate ..gamma../sub L/. When ephi/sub 0//T< or approx. =1 or, equivalently, under the condition E/sub 0/ /sup 2//4..pi..nT>(k/sub 0/r/sub d/)/sup 2/, the damping rate is larger than ..gamma../sub L/. The ratio ..gamma../sub L/ increases exponentially with increasing amplitude and phase velocity of the wave. The mechanism for this effect involves the capture and acceleration of electrons by the wave through a strong perturbation of the velocity distribution by the wave field.

• Research Organization: Institute of Nuclear Physics, Academy of Sciences of the USSR, Novosibirsk
• OSTI ID: 6027617
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 6:5; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
COLLISIONLESS PLASMA
DAMPING
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
LANDAU DAMPING
LEPTONS
PLASMA
PLASMA SIMULATION
PLASMA WAVES
SIMULATION
TRAPPED ELECTRONS