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arXiv physics/0411183physics.plasm-ph
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强磁场与高频电磁波共振加速粒子

Particle acceleration through the resonance of high magnetic field and high frequency electromagnetic wave

Hong Liu, X. T. He, S. G. Chen, W. Y. Zhang

摘要:

我们提出了一种新的粒子加速机制。电子通过电磁和磁场共振加速(EMRA)机制,在几个电磁波周期内被加速到相对论能量。我们发现电子加速不仅与电磁波强度有关,而且与电子的拉莫尔频率与电磁波频率的比值有关。当比率接近1时,观察到对应于EMRA的清晰的共振峰。在共振区附近,强磁场对电子加速仍有显著影响。我们导出了绝热极限下相对论电子能量的近似解析解,从而对这一现象有了更全面的理解。在脉冲星磁层的典型参数中,该机制允许粒子在每个电磁波周期内通过高磁场和高频电磁波的共振来增加能量。加速粒子的能谱表现出同步辐射行为。这有助于理解射电脉冲星在超新星遗迹中的高能电子残留发射。本文还讨论了该理论在惯性约束聚变快速点火方案中的其它潜在应用。

英文摘要:

We propose a new particle acceleration mechanism. Electron can be accelerated to relativistic energy within a few electromagnetic wave cycles through the mechanism which is named electromagnetic and magnetic field resonance acceleration (EMRA). We find that the electron acceleration depends not only on the electromagnetic wave intensity, but also on the ratio between electron Larmor frequency and electromagnetic wave frequency. As the ratio approaches to unity, a clear resonance peak is observed, corresponding to the EMRA. Near the resonance regime, the strong magnetic fields still affect the electron acceleration dramatically. We derive an approximate analytical solution of the relativistic electron energy in adiabatic limit, which provides a full understanding of this phenomenon. In typical parameters of pulsar magnetospheres, the mechanism allows particles to increase their energies through the resonance of high magnetic field and high frequency electromagnetic wave in each electromagnetic wave period. The energy spectra of the accelerated particles exhibit the synchrotron radiation behavior. These can help to understand the remaining emission of high energy electron from radio pulsar within supernova remnant. The other potential application of our theory in fast ignition scheme of inertial confinement fusion is also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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