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垂直激波条件下能量粒子加速机制的模拟研究
Alternative TitleStudy of Energetic particle's Acceleration Mechanism at Perpendicular Shock With Particle Simulation Results
孙鹏; 秦刚; 王赤; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
2007
Volume27Issue:6Pages:441-447
ISSN0254-6124
Language中文
Keyword高能粒子 激波加速 漂移加速 耗散加速 垂直激波 磁湍流
Abstract在具有湍动的磁场和垂直激波条件下对大量测试粒子的轨迹进行了数值计算,研究了激波强度和粒子初始能量对于粒子穿越激波的平均能量变化的影响,分析了漂移加速(SDA)在不同条件下对粒子加速的贡献,并给出了一个与数值结果相符合的漂移加速理论公式△E=arnvivup(1-1/s)结果表明,加入磁场湍流后,垂直激波条件下粒子仍主要受到漂移加速作用,而基于粒子引导中心的耗散漂移加速理论在此条件下失效.
Other AbstractLarge amount of test particles' trajectories at perpendicular shock with magnetic tur-bulence are calculated. And the effect of shock strength and particles' initial energy to the average energy change per shock-crossing is also studied. Furthermore, the test particle's energy gain from Shock Drift Acceleration (SDA) under different conditions is analysed, too. In addition, a theoretical formula△E=amvivup(1-3/1)is given for SDA, which agrees very well with our simulation results.The results show that, although magnetic turbulence is included, particles would still be accelerated mainly by SDA at perpendicular shock, while the diffusive shock acceleration, based on the guiding center assumption, is not valid.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1328
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
孙鹏,秦刚,王赤,等. 垂直激波条件下能量粒子加速机制的模拟研究[J]. 空间科学学报,2007,27(6):441-447.
APA 孙鹏,秦刚,王赤,&北京8701信箱.(2007).垂直激波条件下能量粒子加速机制的模拟研究.空间科学学报,27(6),441-447.
MLA 孙鹏,et al."垂直激波条件下能量粒子加速机制的模拟研究".空间科学学报 27.6(2007):441-447.
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