UW-CPTC 13-3R3 Coulomb collision effects on linear Landau damping
نویسنده
چکیده
Coulomb collisions at rate ν produce slightly probabilistic rather than fully deterministic charged particle trajectories in weakly collisional plasmas. Their diffusive velocity scattering effects on the response to a wave yield an effective collision rate νeff ν and a narrow dissipative boundary layer for particles with velocities near the wave phase velocity. These dissipative effects produce temporal irreversibility for times t ∼ 1/νeff during Landau damping of a small amplitude Langmuir wave.
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