Nonlinear development of the Weibel instability and magnetic field generation in collisionless plasmas
Nonlinear development of the Weibel instability and magnetic field generation in collisionless plasmas
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DOI：
10.1088/0031-8949/1996/t63/046
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发表时间：
1996-01-01
期刊：
影响因子：
2.9
通讯作者：
Lontano, M
中科院分区：
文献类型：
--
作者：
Pegoraro, F;Bulanov, SV;Lontano, M
韦伯不稳定性是高强度激光脉冲在欠密等离子体中以相对论振幅传播产生准静态磁场的机制之一。这种不稳定性可以在具有两种电子布居的等离子体中激发：背景冷电子和被激光辐射加速的高能电子。在这里，我们调查的非线性阶段，这种不稳定性的演变分析和数值。我们认为非相对论和相对论制度内的框架工作的冷双电子流体等离子体的描述，其中离子被假定为处于静止状态，并提供一个统一的中和背景。
The Weibel instability is expected to be one of the mechanisms at play in the generation of quasi-static magnetic fields by high-intensity laser pulses propagating with relativistic amplitudes in underdense plasmas. This instability can be excited in a plasma with two electron populations: the background cold electrons and the high energy electrons accelerated by the laser radiation. Here we investigate the nonlinear stage of the evolution of this instability both analytically and numerically. We consider both the non-relativistic and the relativistic regimes within the frame-work of a cold two-electron fluid plasma description, where ions are assumed to be at rest and to provide a uniform neutralizing background.