Effect of Collisions and Magnetic Convergence on Electron Acceleration and Transport in Reconnecting Twisted Solar Flare Loops
Effect of Collisions and Magnetic Convergence on Electron Acceleration and Transport in Reconnecting Twisted Solar Flare Loops
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DOI：
10.1007/s11207-012-0124-4
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发表时间：
2013-06
期刊：
影响因子：
2.8
通讯作者：
M. Gordovskyy;P. Browning;E. P. Kontar;N. Bian
中科院分区：
文献类型：
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作者：
M. Gordovskyy;P. Browning;E. P. Kontar;N. Bian
我们研究了不稳定扭曲日冕环中粒子加速和磁重联的MHD模型。扭结不稳定性导致螺旋电流与强平行电场的形成，从而导致电子加速。采用考虑碰撞散射的测试粒子方法研究了电子在重连环的电场和磁场中的运动。我们讨论了库仑碰撞和环脚附近磁收敛对高能电子居群空间分布和能谱的影响，以及对太阳耀斑硬x射线发射的可能启示。
We study a model of particle acceleration coupled with an MHD model of magnetic reconnection in unstable twisted coronal loops. The kink instability leads to the formation of helical currents with strong parallel electric fields resulting in electron acceleration. The motion of electrons in the electric and magnetic fields of the reconnecting loop is investigated using a test-particle approach taking into account collisional scattering. We discuss the effects of Coulomb collisions and magnetic convergence near loop footpoints on the spatial distribution and energy spectra of high-energy electron populations and possible implications on the hard X-ray emission in solar flares.