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arXiv physics/0203030physics.plasm-phphysics.atom-ph
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强laser场中增强的逆韧致辐射加热率

Enhanced inverse bremsstrahlung heating rates in a strong laser field

A. Brantov, W. Rozmus, V. Yu. Bychenkov, V. T. Tikhonchuk, R. Sydora, C. E. Capjack

摘要:

在振荡电磁场中,电子在离子上散射的测试粒子研究表明,对于漂移速度小于零速度幅值的电子轨迹,小角度碰撞和相位无关轨道的标准理论假设是不正确的。这导致了强激光场中电子能量增益和逆韧致辐射加热率的显著增强。非线性过程,如库仑聚焦和相关碰撞的电子被带回同一离子的振荡场是负责大角度,迎面散射过程。这些轨迹的统计重要性已被检查为单能量束状,麦克斯韦和高度各向异性的电子分布函数。讨论了逆韧致辐射加热率与漂移速度和激光强度的关系。

英文摘要:

Test particle studies of electron scattering on ions, in an oscillatory electromagnetic field have shown that standard theoretical assumptions of small angle collisions and phase independent orbits are incorrect for electron trajectories with drift velocities smaller than quiver velocity amplitude. This leads to significant enhancement of the electron energy gain and the inverse bremsstrahlung heating rate in strong laser fields. Nonlinear processes such as Coulomb focusing and correlated collisions of electrons being brought back to the same ion by the oscillatory field are responsible for large angle, head-on scattering processes. The statistical importance of these trajectories has been examined for mono-energetic beam-like, Maxwellian and highly anisotropic electron distribution functions. A new scaling of the inverse bremsstrahlung heating rate with drift velocity and laser intensity is 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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