Fast reconnection in relativistic pair plasmas: Analysis of particle acceleration in self-consistent full particle simulations
Fast reconnection in relativistic pair plasmas: Analysis of particle acceleration in self-consistent full particle simulations
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DOI：
10.1063/1.1644814
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发表时间：
2004-02
影响因子：
2.2
通讯作者：
C. Jaroschek;R. Treumann;H. Lesch;M. Scholer
中科院分区：
文献类型：
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作者：
C. Jaroschek;R. Treumann;H. Lesch;M. Scholer
在相对论性电子-正电子等离子体中研究了无碰撞磁重联中的粒子加速问题。对于第一次，高度动态的后期演变的重联在两个维度（2D）和有限大小的加速区域的三维应用完全电磁相对论粒子在细胞（PIC）代码解决了模拟。后期的演变是非常重要的粒子加速，因为薄电流片显示出高度动态的后期阶段的不稳定性演变的阿尔芬速度VA 0制度。因此，由于c vA 0是有效的对等离子体的特性，v× B-贡献成为加速电场中的主导。最值得注意的是：虽然加速区域在后期是高度可变的，但与早期的准静态重联配置相比，粒子能量分布的幂律形状是平滑的[S. Zenitani和M.星野，太空人。J. 562，L63（2001）]。光谱
Particle acceleration in collisionless magnetic reconnection is studied in the relativistic regime of an electron-positron plasma. For the first time, the highly dynamic late-time evolution of reconnection is simulated in two dimensions (2D) and the finite size of the acceleration region is resolved in 3D applying a fully electromagnetic relativistic particle-in-cell (PIC) code. The late-time evolution is extremely important with respect to particle acceleration, because thin current sheets show a highly dynamic late-time phase with instabilities evolving in the Alfven velocity vA0 regime. Consequently, since c∼vA0 is valid as a peculiarity of pair plasmas, v×B-contributions become dominant in the accelerating electric field. Most remarkable: Though acceleration regions are highly variable at late times, the power-law shape of the particle energy distribution is smoothed compared to quasi-static reconnection configurations at early times [S. Zenitani and M. Hoshino, Astrophys. J. 562, L63 (2001)]. Spectra...