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首页> 外文会议>Conference on Superintense Light Fields and Ultrafast Processes; 20030630-20030704; St.Petersburg; RU >2D Lagrangian code 'ATLANT - HE' for simulation of laser - plasma interaction with allowance for hot electron generation and transport
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2D Lagrangian code 'ATLANT - HE' for simulation of laser - plasma interaction with allowance for hot electron generation and transport

机译：2D拉格朗日代码“ ATLANT-HE”，用于模拟激光-等离子体相互作用并允许热电子生成和传输

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摘要

Hot electrons may significantly influence interaction of ultra short laser pulses with solids. Accurate consideration of resonant absorption of laser energy and hot electrons generation at a critical surface was achieved through the developed physical and mathematical models. 2D ray tracing algorithm has been developed to simulate laser beam refraction and Bremsstrahlung absorption with allowance for non-linear influence of a strong electromagnetic field. Hot electrons transport was considered as a straight-line flows weakening by a friction force calculated in the approximation of the average state of ionization. Developed models were coupled with 2D Lagrangian gas dynamic code "ATLANT" that takes into account non-linear heat transport. The developed program has been applied to simulate irradiations of Al foils by picosecond laser double pulses. Hot electrons transport and heating resulted in thin foil explosions. The transition from exploding foil regime to the ablative one with foil thickening has been simulated and analyzed at various values of laser light intensity. In second series of calculations we have modeled the interaction of nanosecond iodine laser with two-layered target.
机译：热电子可能会极大地影响超短激光脉冲与固体的相互作用。通过开发的物理和数学模型，可以准确地考虑到激光能量在共振共振吸收和临界表面产生的热电子。已经开发了2D射线追踪算法，以模拟激光束折射和Bre致辐射吸收，并考虑到强电磁场的非线性影响。热电子传输被认为是通过近似于电离平均状态所计算的摩擦力使直线流减弱。已开发的模型与考虑了非线性传热的二维拉格朗日气体动力学代码“ ATLANT”结合使用。已开发的程序已应用于模拟皮秒激光双脉冲对铝箔的照射。电子的热传输和加热导致薄箔爆炸。在各种激光强度值下，已经模拟并分析了从爆炸箔状态到具有箔增厚的烧蚀状态的过渡。在第二系列计算中，我们对纳秒碘激光与两层靶的相互作用进行了建模。

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