Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Poster I

DY 24.61: Poster

Mittwoch, 28. März 2007, 16:00–18:00, Poster D

LONGITUDINAL HEAT FLOWS IN COLLISIONLESS ANISOTROPIC PLASMAS, ARISING IN MHD MOTIONS. — •igor grigoriev¹ and vladimir pastukhov² — ¹RRC ''Kurchatov Institute'' Moscow Russia — ²RRC ''Kurchatov Institute'' Moscow Russia

Magnetohydrodynamic motions of finite-beta collisionless plasmas with anisotropic pressure confined by magnetic field are considered. For convenience and simplicity we analyze Z-pinch-like magnetic configuration with purely azimuthal magnetic field. Non-axisymmetric Alfven modes are analyzed within one-fluid MHD-like model, however, perturbations of longitudinal and transversal plasma pressures are calculated from kinetic equation using path-integral method. It is shown that adiabats of Chew-Goldberger-Low fail their applicability in the case of low-frequency (below bounce-frequency) non-axisymmetric plasma perturbations due to arising longitudinal energy fluxes. The obtained pressure perturbations are used to analyze the stability of non-axisymmetric (Alfven) modes.