Weibel instability on weakly relativistic produced plasma by circular polarization microwave electric field

Magnetized Current Filaments as a Source of Circularly Polarized Light

We show that the Weibel or currente filamentation instability can lead to the emission of circularly polarized radiation. Using particle-in-cell (PIC) simulations and a radiation post-processing numerical algorithm, we demonstrate that the level of circular polarization increases with the initial plasma magnetization, saturating at ~13% when the magnetization, given by the ratio of magnetic energy density to the electron kinetic energy density, is larger than 0.05. Furthermore, we show that this effect requires an ion-electron mass ratio greater than unity. These findings, which could also be …

一维模拟几何中膨胀等离子体的Weibel型与非共振哨声波增长

Weibel- and non-resonant Whistler wave growth in an expanding plasma in a 1D simulation geometry

该研究通过一维粒子模拟，发现膨胀等离子体中由热各向异性驱动的Weibel型与哨声波非共振增长，且振幅可探测。

膨胀无碰撞等离子体中的电子Weibel不稳定性与准静磁结构

Electron Weibel instability and~quasi-magnetostatic structures in~an~expanding collisionless plasma

本研究针对膨胀无碰撞等离子体中的电子Weibel型不稳定性，结合不同外磁场、热电子注入形式及背景等离子体条件，通过粒子模拟揭示电流结构演化规律，可为实验室和空间等离子体的电流成丝及磁湍流问题研究提供支撑。

Weibel instability in relativistic asymmetric electron positron plasma

We consider a situation in when the interaction of relativistically intense EM waves with an isotropic electron positron plasma takes place, i.e.,we consider short pulse lasers with intensity up to 1021 W/cm2, in which the photon density is of the order of 1030cm3 and the strength of electric field E = 10^9 statvolt/cm. Such a situation is possible in astrophysical and laboratory plasma which are subject to intense laser radiation, thus leading to non thermal equilibrium field radiations. Such interaction of the super-strong laser radiation with an isotropic pair plasma leads to the generation…

Low-Frequency Instability of Linearly and Circularly-Polarized-Microwave-Field Produced Plasmas

The gas breakdown produced by high-power pulsed linearly and circularly polarized microwave fields which are much weaker than the atomic fields is investigated in the non-relativistic limit. Obtained the electron distribution function produced by the interaction with intense linearly and circularly polarized microwave fields, it is shown that it is non-equilibrium and anisotropic. Finding the general dispersion relation and analyzing it, we firstly obtain the low frequency oscillations and secondly we show that an instability may develop in the aforementioned system. It will be shown that for …

Magnetic instability in a dilute circular rarefaction wave

The generation of a magnetic field in a circular rarefaction wave is examined in form of a 2D particle-in-cell (PIC) simulation. Electrons with a temperature of 32 keV are uniformly distributed within a cloud with a radius of 14.2 electron skin depths. They expand under their thermal pressure and carry with them the cold protons, which are initially concentrated in a hollow ring at the boundary of the electron cloud. The interior of the ring contains an immobile positive charge background that compensates for the electron charge. The protons expand in form of a circularly symmetric rarefaction…