Full particle-in-cell simulation of the interaction between two plasmas for laboratory experiments on the generation of magnetized collisionless shocks with high-power lasers
Full particle-in-cell simulation of the interaction between two plasmas for laboratory experiments on the generation of magnetized collisionless shocks with high-power lasers
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DOI：
10.1063/1.5079906
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发表时间：
2019-02
影响因子：
2.2
通讯作者：
T. Umeda;R. Yamazaki;Y. Ohira;Natsuki Ishizaka;Shin Kakuchi;Y. Kuramitsu;S. Matsukiyo;I. Miyata;T. Morita;Y. Sakawa;T. Sano;S. Sei;S. Tanaka;Hirohumi Toda;S. Tomita
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文献类型：
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作者：
T. Umeda;R. Yamazaki;Y. Ohira;Natsuki Ishizaka;Shin Kakuchi;Y. Kuramitsu;S. Matsukiyo;I. Miyata;T. Morita;Y. Sakawa;T. Sano;S. Sei;S. Tanaka;Hirohumi Toda;S. Tomita
利用一维粒子模拟对高功率激光产生磁化无碰撞激波的实验室实验进行了初步的数值实验。本文研究静止状态下运动的铝等离子体与氮等离子体之间的相互作用。在数值实验中，氮等离子体未被磁化或被弱磁场磁化。由于以前的研究表明，由于Biermann电池在活塞(铝)等离子体中产生了自发磁场，所以磁场的影响是令人感兴趣的。当两个等离子体中的一个被磁化时，在两个等离子体的界面附近观察到电子密度和磁场的急剧跳跃，这表明形成了切向电-磁-流体不连续。当铝等离子体被磁化时，在铝等离子体区氮离子的旋转过程中，纯铝等离子体的密度和磁场都发生了强烈的压缩。下游激波的形成是从激波跳跃条件得到的。结果表明，活塞(铝)等离子体中的自发磁场在垂直无碰撞激波的形成中起着至关重要的作用。采用一维粒子模拟方法，对高功率激光产生磁化无碰撞激波的实验室实验进行了初步的数值实验。本文研究静止状态下运动的铝等离子体与氮等离子体之间的相互作用。在数值实验中，氮等离子体未被磁化或被弱磁场磁化。由于以前的研究表明，由于Biermann电池在活塞(铝)等离子体中产生了自发磁场，所以磁场的影响是令人感兴趣的。当两个等离子体中的一个被磁化时，在两个等离子体的界面附近观察到电子密度和磁场的急剧跳跃，这表明形成了切向电-磁-流体不连续。当铝等离子体被磁化时，纯铝等离子体在磁化过程中密度和磁场都发生了强烈的压缩。
A preliminary numerical experiment is conducted for laboratory experiments on the generation of magnetized collisionless shocks with high-power lasers by using one-dimensional particle-in-cell simulation. The present study deals with the interaction between a moving aluminum plasma and a nitrogen plasma at rest. In the numerical experiment, the nitrogen plasma is unmagnetized or magnetized by a weak external magnetic field. Since the previous study suggested the generation of a spontaneous magnetic field in the piston (aluminum) plasma due to the Biermann battery, the effect of the magnetic field is of interest. Sharp jumps of the electron density and magnetic field are observed around the interface between the two plasmas as long as one of the two plasmas is magnetized, which indicates the formation of tangential electron-magneto-hydro-dynamic discontinuity. When the aluminum plasma is magnetized, strong compression of both the density and the magnetic field takes place in the pure aluminum plasma during the gyration of nitrogen ions in the aluminum plasma region. The formation of a shock downstream is obtained from the shock jump condition. The results suggest that the spontaneous magnetic field in the piston (aluminum) plasma plays an essential role in the formation of a perpendicular collisionless shock.A preliminary numerical experiment is conducted for laboratory experiments on the generation of magnetized collisionless shocks with high-power lasers by using one-dimensional particle-in-cell simulation. The present study deals with the interaction between a moving aluminum plasma and a nitrogen plasma at rest. In the numerical experiment, the nitrogen plasma is unmagnetized or magnetized by a weak external magnetic field. Since the previous study suggested the generation of a spontaneous magnetic field in the piston (aluminum) plasma due to the Biermann battery, the effect of the magnetic field is of interest. Sharp jumps of the electron density and magnetic field are observed around the interface between the two plasmas as long as one of the two plasmas is magnetized, which indicates the formation of tangential electron-magneto-hydro-dynamic discontinuity. When the aluminum plasma is magnetized, strong compression of both the density and the magnetic field takes place in the pure aluminum plasma during...