Incessant acceleration of relativistic ions by an oblique shock wave
Incessant acceleration of relativistic ions by an oblique shock wave
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倾斜冲击波对相对论性离子的持续加速
DOI：
10.1063/1.1369120
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发表时间：
2001
影响因子：
2.2
通讯作者：
Y. Ohsawa
中科院分区：
文献类型：
--
作者：
S. Usami;H. Hasegawa;Y. Ohsawa
对非热、快离子在斜激波中的运动进行了理论和数值研究。在遇到冲击波之后，一些快离子就会随之移动。然后，它们的能量在每个回转周期增加一次。它们与磁场平行的动量也增加了。因此，这些粒子最终逃逸，走在海浪的前面。然而，理论上预测，在某些情况下，由于相对论效应，粒子不能在激波传播方向上比波传播得更快。因此，一些粒子无法从波中逃逸。因此，这种加速可以无限地重复。这个想法是通过一个一维的，相对论的，电磁的，完全离子和电子动力学的粒子模拟程序来检验的。模拟结果表明，相对论离子确实存在反复加速现象。观察到加速过程一直持续到模拟运行结束。此外，还表明，一个……
Motions of nonthermal, fast ions in an oblique shock wave are studied theoretically and numerically. After the encounter with a shock wave, some of the fast ions get to move with it. Their energies then increase once in each gyroperiod. Their momenta parallel to the magnetic field also increase. Thus, these particles eventually escape, going away ahead of the wave. However, it is theoretically predicted that under certain circumstances, owing to relativistic effects, particles cannot go faster in the direction of the shock propagation than the wave. Some particles therefore cannot escape from the wave. Accordingly, the acceleration could be repeated indefinitely. This idea is examined by means of a one-dimensional, relativistic, electromagnetic, particle simulation code with full ion and electron dynamics. The simulations demonstrate that the repeated acceleration of relativistic ions does occur. The acceleration processes were observed to continue until the end of simulation run. Also, it is shown that a...
影响因子：
8.6
作者：
TAJIMA, T;DAWSON, JM
通讯作者：
DAWSON, JM