Time Evolution of Collisionless Shock in Counterstreaming Laser-Produced Plasmas
Time Evolution of Collisionless Shock in Counterstreaming Laser-Produced Plasmas
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DOI：
10.1103/physrevlett.106.175002
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发表时间：
2011-04-26
影响因子：
8.6
通讯作者：
Takabe, H.
中科院分区：
文献类型：
--
作者：
Kuramitsu, Y.;Sakawa, Y.;Takabe, H.
我们研究了用高功率激光脉冲产生的对流等离子体中强无碰撞激波的时间演化。用激光照射CH双面靶产生了逆流等离子体。在自发射条纹光学测温数据中，自发射轮廓随着两等离子体相互作用的演变而变陡，这表明激波的形成。激波厚度小于逆流离子的平均自由程。自发辐射和阴影图的二维快照也显示了非常薄的激波结构。从流动速度和亮温估算的马赫数都很高。
We investigated the time evolution of a strong collisionless shock in counterstreaming plasmas produced using a high-power laser pulse. The counterstreaming plasmas were generated by irradiating a CH double-plane target with the laser. In self-emission streaked optical pyrometry data, steepening of the self-emission profile as the two-plasma interaction evolved indicated shock formation. The shock thickness was less than the mean free path of the counterstreaming ions. Two-dimensional snapshots of the self-emission and shadowgrams also showed very thin shock structures. The Mach numbers estimated from the flow velocity and the brightness temperatures are very high.