On the Nonlinear Effects of Magnetoacoustic Perturbations in Optically Thin Quasi-Isentropic Plasmas

• Authors: A. Perelomova , F. Ratkowski
• Languages of publication: EN

Abstracts

EN

Nonlinear effects of planar magnetosound perturbations in a plasma are discussed. Plasma is non-adiabatic due to optically thin radiation and external heating. For these reasons, thermal instability of a plasma may appear which makes it acoustically active. The plasma is assumed to be initially homogeneous ideal gas with infinite electrical conductivity permeated by a straight magnetic field which is orthogonal to the trajectories of gas particles. The instantaneous dynamic equations which describe nonlinear effects of intense sound in quasi-isentropic plasma, are derived. Nonlinear interaction of periodic and aperiodic magnetoacoustic perturbations with the non-wave modes, are discussed. The conclusions concern dissipative or active behavior of magnetoacoustic perturbations which is determined by the kind of the heating-cooling function.

Keywords

EN

43.25.-x; 43.25.Nm

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 1
• Pages: 194-200

Dates

published

2018-01

received

2017-04-04

(unknown)

2017-11-02

Contributors

author

A. Perelomova

• Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, G. Narutowicza 11/12, 80-233 Gdańsk, Poland

author

F. Ratkowski

• Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, G. Narutowicza 11/12, 80-233 Gdańsk, Poland

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Identifiers

DOI

10.12693/APhysPolA.131.194