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A solution to the radiative collapse problem in Z-pinch simulations

机译：Z捏模拟中的辐射坍塌问题的解决方案

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Summary form only given. In a recent paper, Velikovich, et al.,proposed a model for enhanced energy coupling in a Z-pinch via theincorporation of exterior magnetic field through the Rayleigh-Taylorunstable plasma-vacuum interface. This theory models the pinch plasma asa foam-like medium saturated with toroidal “magneticbubbles” which convert field energy to plasma thermal energy oncethe pinch and entrained bubbles converge to the pinch axis. The presentwork combines the model equations with a 1-D (radially resolved)radiation magneto-hydrodynamic (MHD) code for the pinch implosion. Thepinch plasma is treated as a two fluid medium with a volume fraction Cucomprised of magnetic voids and the remaining fraction of plasma gas.The interface formation rate of bubbles is a parameter of thesimulation. The bubbles move through the gas according to a dragequation. Energy is transferred to the ions through drag heating becauseof the difference in velocity and electrons through pdV work. Separateinduction equations for the magnetic field in the plasma gas and in thebubbles are included
机译：仅提供摘要表格。在Velikovich等人的最新论文中， 提出了一个模型，用于通过 通过瑞利泰勒引入外部磁场 血浆-真空界面不稳定。该理论将收缩等离子体建模为 充满环形“磁性”的泡沫状介质 气泡”，一次将场能转换为等离子体热能 夹带和夹带气泡会聚到夹带轴。现在 工作将模型方程与一维（径向分解）结合起来 夹缩内爆的辐射磁流体动力学（MHD）代码。这 收缩等离子体被视为体积分数为Cu的两种流体介质 由磁性空隙和等离子气体的剩余部分组成。 气泡的界面形成速率是 模拟。气泡根据阻力在气体中移动 方程。通过拖动加热将能量转移到离子上，因为 通过pdV的速度和电子的差异分离 等离子气体和气体中磁场的感应方程 包含气泡

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