Particle acceleration in three-dimensional tearing configurations
Particle acceleration in three-dimensional tearing configurations
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DOI：
10.1063/1.1542612
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发表时间：
2003-01
影响因子：
2.2
通讯作者：
C. Nodes;G. T. Birk;H. Lesch;R. Schopper
中科院分区：
文献类型：
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作者：
C. Nodes;G. T. Birk;H. Lesch;R. Schopper
在由不稳定的阻性撕裂模产生的三维电磁组态中，粒子可以有效地加速到相对论能量。为了证明这一点，电阻磁流体力学模拟被用作连续测试粒子模拟的输入配置。模拟表明，三维非线性演化撕裂模能够加速垂直于重新连接磁场分量平面的粒子。这种模拟方法与分析方法有很大的不同，因为它涉及一个真实的三维电场，其中一个不均匀的分量平行于电流方向。由此产生的粒子谱表现出强烈的俯仰角各向异性。通常，大约5%-8%的初始麦克斯韦分布被加速到由宏观广义电势结构给出的最大能级。这两种结果都显示了感兴趣的非相对论粒子加速，例如在...
In three-dimensional electromagnetic configurations that result from unstable resistive tearing modes, particles can be efficiently accelerated to relativistic energies. To prove this, resistive magnetohydrodynamic simulations are used as input configurations for successive test particle simulations. The simulations show the capability of three-dimensional nonlinearly evolved tearing modes to accelerate particles perpendicular to the plane of the reconnecting magnetic field components. The simulations differ considerably from analytical approaches by involving a realistic three-dimensional electric field with a nonhomogeneous component parallel to the current direction. The resulting particle spectra exhibit strong pitch-angle anisotropies. Typically, about 5%–8% of an initially Maxwellian distribution is accelerated to the maximum energy levels given by the macroscopic generalized electric potential structure. Results are shown for both, nonrelativistic particle acceleration that is of interest, e.g., in...