Department of Electrical Engineering, University of California Los Angeles, Los Angeles, California 90095, USA.
Phys Rev Lett. 2013 Apr 19;110(16):165001. doi: 10.1103/PhysRevLett.110.165001. Epub 2013 Apr 15.
Using particle-in-cell simulations, we examine hot electron generation from electron plasma waves excited by stimulated Raman scattering and rescattering in the kinetic regime where the wave number times the Debye length (kλ(D)) is >/~0.3 for backscatter. We find that for laser and plasma conditions of possible relevance to experiments at the National Ignition Facility, anomalously energetic electrons can be produced through the interaction of a discrete spectrum of plasma waves generated from stimulated Raman scattering (back and forward scatter), rescatter, and the Langmuir decay of the rescatter-generated plasma waves. Electrons are bootstrapped in energy as they propagate into plasma waves with progressively higher phase velocities.
利用粒子模拟，我们研究了在动理学条件下，由受激拉曼散射激发的电子等离子体波后向散射中产生的热电子，其中波数乘以德拜长度（kλ(D)）大于/等于 0.3。我们发现，对于可能与国家点火装置实验相关的激光和等离子体条件，通过受激拉曼散射（前向和后向散射）、后向散射以及后向散射产生的等离子体波的朗缪尔衰减所产生的离散谱的等离子体波的相互作用，可以产生能量异常高的电子。随着电子向前传播到具有更高相速度的等离子体波中，它们的能量被逐步提升。
