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Magnetic reconnection: from MHD to QED

机译：磁重联：从MHD到QED

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摘要

The paper examines the prospects of using laser plasmas for studying novel regimes of the magnetic field line reconnection and charged particle acceleration. Basic features of plasma dynamics in the three-dimensional configurations relevant to the formation of current sheets in a plasma are addressed by analyzing exact self-similar solutions of the magneto-hydrodynamics and electron magneto-hydrodynamics equations. Then the magnetic field annihilation in the ultrarelativistic limit is considered, when the opposite polarity magnetic field is generated in collisionless plasma by multiple laser pulses, in the regime with a dominant contribution of the displacement current exciting a strong large-scale electric field. This field leads to the conversion of the magnetic energy into the kinetic energy of accelerated particles inside a thin current sheet. Charged particle acceleration during magnetic field reconnection is discussed when radiation friction and quantum electrodynamics effects become dominant.
机译：本文研究了利用激光等离子体研究磁场线重新连接和带电粒子加速度的新型制度的前景。通过分析磁力流体动力学和电子磁力流体动力学方程的精确自相似解，通过分析了与等离子体中当前纸张形成相关的三维配置中的等离子体动力学的基本特征。然后考虑在通过多个激光脉冲中由多个激光等离子体产生相反的极性磁场，在由多个激光脉冲中产生相反的极性磁场，在具有激励强大的大型电场的位移电流的主导贡献的状态下，考虑磁场湮灭。该场导致磁能转化为薄电流片内加速颗粒的动能。当辐射摩擦和量子电动力学效应成为主导时，讨论了磁场重新连接期间的带电粒子加速度。

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