Particle Acceleration in Stressed Coronal Magnetic Fields
Particle Acceleration in Stressed Coronal Magnetic Fields
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DOI：
10.1086/428395
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发表时间：
2005-02
期刊：
影响因子：
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通讯作者：
R. Turkmani;L. Vlahos;K. Galsgaard;P. Cargill;H. Isliker
中科院分区：
文献类型：
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作者：
R. Turkmani;L. Vlahos;K. Galsgaard;P. Cargill;H. Isliker
这封信提出了一个复杂的磁场环境模型中的耀斑太阳日冕粒子加速的分析。一个细长的通量管，最初在流体动力学平衡，强调随机光球运动。一个三维MHD代码被用来跟踪瞬态电流片的随机发展。这些过程会产生一个高度碎片化的电场，通过这个电场，使用相对论测试粒子代码来跟踪粒子。结果表明，离子和电子都很容易加速到相对论能量的时间为10-2秒的电子和10-1秒的质子形成幂律分布的能量。
This Letter presents an analysis of particle acceleration in a model of the complex magnetic field environment in the flaring solar corona. A slender flux tube, initially in hydrodynamic equilibrium, is stressed by random photospheric motions. A three-dimensional MHD code is used to follow the stochastic development of transient current sheets. These processes generate a highly fragmented electric field, through which particles are tracked using a relativistic test particle code. It is shown that both ions and electrons are accelerated readily to relativistic energies in times of order 10-2 s for electrons and 10-1 s for protons forming power-law distributions in energy.