Instability development in the non-equilibrium stratified hydrogen plasma
Authors: Kozyrev A.V., Dokukin M.Yu.
Published in issue: #2(146)/2024
DOI: 10.18698/2308-6033-2024-2-2335
Category: Mechanics | Chapter: Mechanics of Liquid, Gas, and Plasma
The paper presents experimental study and theoretical analysis of possible instabilities in the non-equilibrium stratified plasma. Complex probe measurements and corresponding spectral research in a hydrogen discharge of intermediate pressure with the specific discharge power of 3...5 kW/m3 (currents of 200...300 mA) identified inhomogeneous structure of the plasma formation. Analysis of the data obtained indicates presence of the unstable plasma layer in the stratum head with the developed ion-acoustic turbulence and of the relatively stable diffuse tail in that discharge. From the kinetic point of view, presence of the ion-acoustic instability leads to quasi-linear relaxation in the electron distribution function. To check and select plasma instabilities manifesting under the given discharge conditions, the ion temperature choice was justified corresponding to the average electron temperature in the stratum tail. The paper also proves possibility of generating the ion-acoustic plasmons under the parametric instability.
EDN VGATZM
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