Ponderomotive scaling in the radiative damping regime
Ponderomotive scaling in the radiative damping regime
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DOI：
10.1063/1.4995256
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发表时间：
2017-09
影响因子：
2.2
通讯作者：
R. Pandit;Edward Ackad;E. D'humieres;Y. Sentoku
中科院分区：
文献类型：
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作者：
R. Pandit;Edward Ackad;E. D'humieres;Y. Sentoku
通过考虑辐射阻尼项的高阶项，得到了超强激光物质相互作用的有质动力。由强激光脉冲在相互作用过程中产生的有质动压和电子加速共同产生的无碰撞激波加速离子，由于辐射衰减而变得不那么有效。通过在超强激光区域施加具有辐射反应的力，导出了一种新的有质动力标度，并用包含在运动方程中的辐射阻尼项进行了格子模拟。我们发现在激波速度和加速离子能量方面，理论和模拟结果符合得很好。
The ponderomotive force for super intense laser matter interactions has been derived by taking into account the higher order terms of radiative damping. The ion acceleration via collisionless shock, generated by both the ponderomotive pressure of the intense laser pulse during the interaction and the electron acceleration, becomes less efficient due to the radiative damping. A new ponderomotive scaling has been derived by applying the force with the radiation reaction to the super intense laser regime, and it is benchmarked by a particle-in-cell simulation with the radiative damping terms included in equations of motion. We find good agreement between theoretical and simulation results in terms of shock velocity and accelerated ion energy.