Collisionless heating in Vlasov plasma and turbulence-driven filamentation aspects

被引:0
作者
Ghizzo, A. [1 ]
Del Sarto, D. [1 ]
Betar, H. [2 ,3 ]
机构
[1] IJL, UMR 7168, Campus ARTEM,2 Allee Andre Guinier,BP 50840, F-54011 Nancy, France
[2] Aix Marseille Univ, CNRS, Cent Marseille, M2P2,UMR 7340, Marseille, France
[3] Renaissance Fus, F-38600 Fontaine, France
关键词
WEIBEL INSTABILITY; MAGNETIC RECONNECTION; SYNCHRONIZATION; SIMULATION; MODEL; WAVES; ACCELERATION; OSCILLATORS; RELAXATION; GENERATION;
D O I
10.1063/5.0205253
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Reversible energy conversion between magnetic and kinetic energies has been recently demonstrated in a system of counterstreaming electron beams [see A. Ghizzo et al., Phys. Rev. Lett. 131, 035101 (2023)]. During the first step of the instability, the growth of a current-driven filamentation magnetic field is observed when propagative oblique solutions are considered, followed by the reversal of energy transfer from magnetic to kinetic energy in a second step. This highlights a new physical mechanism of the Vlasov equation: the enhancement of filamentation of the distribution function in the presence of the phase synchronization of the Van Kampen eigenmodes. This gives rise to a bifurcation toward self-organization and to a strong plasma heating. This new plasma heating mechanism possibly provides a new perspective on the role played by the filamentation in phase space in the relativistic regime of Weibel-type instabilities.
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页数:20
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