Monte Carlo Simulation of Partially Ionized Hydrogen Plasmas

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• 作者：C. Cordes ; Th. Bornath and R. Redmer
• 刊名：Contributions to Plasma Physics
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：56
• 期：5
• 页码：475-481
• 全文大小：215K
• ISSN：1521-3986

文摘

A Monte Carlo code has been developed for the interaction of initially neutral systems with intense ultra-short laser pulses. Photoionization creates immediately a partially ionized, non-equilibrium plasma for which the relevant scattering processes are included. In this way the absorption of the laser energy in the plasma and the evolution of the non-equilibrium electron distribution function during the laser pulse is described. Furthermore, the relaxation into an equilibrium state can be studied for longer time scales. As an example we consider the interaction of a cold liquid hydrogen jet with intense, ultra-short free electron laser pulses in the extreme ultraviolet spectral range. The corresponding spectrum of the Thomson self-scattering is calculated using the non-equilibrium electron distribution functions extracted from the Monte Carlo simulations. We compare with benchmarking experiments performed at the free electron laser facility FLASH. (