Fluid-maxwell simulation of laser pulse dynamics in overdense plasma
Fluid-maxwell simulation of laser pulse dynamics in overdense plasma
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DOI：
10.1063/1.1924708
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发表时间：
2005-05
影响因子：
2.2
通讯作者：
V. Berezhiani;D. Garuchava;S. Mikeladze;K. Sigua;N. Tsintsadze;S. Mahajan;Y. Kishimoto;K. Nishikawa
中科院分区：
文献类型：
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作者：
V. Berezhiani;D. Garuchava;S. Mikeladze;K. Sigua;N. Tsintsadze;S. Mahajan;Y. Kishimoto;K. Nishikawa
利用全麦克斯韦方程组和相对论流体力学方程组描述的一维无碰撞电子等离子体模型，研究了相对论强圆偏振激光脉冲与过稠密等离子体的相互作用。对超相对论脉冲的数值模拟表明，无论是在低本底密度下还是在高本底密度下，穿透能量的大部分都被囚禁在靠近等离子体前端的动态层中，只有一小部分驻留在孤子中。揭示了中等强度和强相对论脉冲与半无限薄等离子体相互作用的重要细节。分析了相对论强辐射在过稠密等离子体中的长时间限制的另一个有趣的结果。结果表明，由于三叉戟过程，等离子体电子的驱动运动产生了密集的电子对。
A one-dimensional model of collisionless electron plasma, described by the full system of Maxwell and relativistic hydrodynamic equations, is exploited to study the interaction of relativistic, strong, circularly polarized laser pulses with an overdense plasma. Numerical simulations for the ultrarelativistic pulses demonstrates that for the low as well as for the high background density, the major part of the penetrated energy remains trapped for a long time in a nonstationary layer near the plasma front end; only a minor portion resides in solitons. Important details of the interaction for the moderately intense and strongly relativistic pulses for semi-infinite and thin plasma layers are revealed. An interesting additional consequence of the long-time confinement of relativistic strong radiation in an overdense plasma is analyzed. It is shown that intensive pair production by the driven motion of plasma electrons takes place due to the trident process.