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      Simulating the external magnetic field in short-pulse intense laser-plasma interaction

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          Abstract

          Imposing an external magnetic field in short-pulse intense laser-plasma interaction is of broad scientific interest in related plasma research areas. We propose a simple method using a virtual current layer by introducing an extra current density term to simulate the external magnetic field, and demonstrate it with three-dimensional particle-in-cell simulations. The field distribution and its evolution in sub-picosecond time scale are obtained. The magnetization process takes a much longer time than that of laser-plasma interaction due to plasma diamagnetism arising from collective response. The long-time evolution of magnetic diffusion and diamagnetic current can be predicted based on a simplified analytic model in combination with simulations.

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          Author and article information

          Journal
          16 September 2019
          Article
          1909.07301

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          Custom metadata
          5 pages, 5 figures
          physics.plasm-ph astro-ph.IM physics.space-ph

          Plasma physics, Instrumentation & Methods for astrophysics, Space Physics

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