In-depth plasma-wave heating of dense plasma irradiated by short laser pulses.
In-depth plasma-wave heating of dense plasma irradiated by short laser pulses.
复制标题
短激光脉冲照射的致密等离子体的深度等离子体波加热。
DOI：
10.1103/physrevlett.113.255001
复制
发表时间：
2014
影响因子：
8.6
通讯作者：
W. Rozmus
中科院分区：
文献类型：
--
作者：
M. Sherlock;E. Hill;R. Evans;S. Rose;W. Rozmus
研究了超短强激光脉冲辐照靶表面产生的相对论电子束团向靶深部传递能量的机制。在现有的理论中，占主导地位的加热机制是通过中和返回电流的电阻加热。除此之外，我们还发现在等离子体中，相对论性电子束团的尾流会引起大振幅的等离子体波。这些波的随后的碰撞阻尼表示可以超过电阻加热速率的加热源。因此，固体靶的加热速度比以前考虑的要快得多。一个新的混合模型，能够再现这些结果，描述。
We investigate the mechanism by which relativistic electron bunches created at the surface of a target irradiated by a very short and intense laser pulse transfer energy to the deeper parts of the target. In existing theories, the dominant heating mechanism is that of resistive heating by the neutralizing return current. In addition to this, we find that large amplitude plasma waves are induced in the plasma in the wake of relativistic electron bunches. The subsequent collisional damping of these waves represents a source of heating that can exceed the resistive heating rate. As a result, solid targets heat significantly faster than has been previously considered. A new hybrid model, capable of reproducing these results, is described.