Pitch angle scattering of fast particles by low frequency magnetic fluctuations
Pitch angle scattering of fast particles by low frequency magnetic fluctuations
复制标题
低频磁涨落对快粒子的俯仰角散射
作者：
Yi Xu;J. Egedal
粒子运动过程中磁矩的绝热不变性对磁化等离子体动力学具有重要意义。本文研究了在静态磁场扰动下快速粒子的俯仰角散射率。对于具有局部扰动的均匀磁场，发现曲率参数κ2 = min（Rc/ρL）不能预测俯仰角散射的水平。相反，基于在规定的磁场中的粒子轨道的数值积分，我们推导出粒子散射率的预测，其可以由相对扰动幅度A ' δB/B和由扰动的场对准波长ρL/λ归一化的粒子拉莫尔半径表征。粒子的ρL/λ π ' 1，受到强烈的俯仰角散射，而散射的水平为零的两个限制ρL/λ π 1和ρL/λ π 1。结果进行了总结的散射算子，适合于包括所描述的散射基本动力学模型。
The adiabatic invariance of the magnetic moment during particle motion is of fundamental importance to the dynamics of magnetized plasma. The related rate of pitch angle scattering is investigated here for fast particles that thermally stream through static magnetic perturbations. For a uniform magnetic field with a localized perturbation it is found that the curvature parameter κ2 = min(Rc/ρL) does not predict the level of pitch angle scattering. Instead, based on numerical integration of particle orbits in prescribed magnetic fields, we derive predictions for the particle scattering rates, which can be characterized by the relative perturbation amplitude A ' δB/B, and the particle Larmor radius normalized by the field-aligned wavelength of the perturbations, ρL/λ‖. Particles with ρL/λ‖ ' 1, are subject to strong pitch angle scattering, while the level of scattering vanishes for both the limits of ρL/λ‖ 1 and ρL/λ‖ 1. The results are summarized in terms of a scattering operator, suitable for including the described scattering in basic kinetic models.
平行速度混合在磁力泵浦过程中产生增强的电子加热
影响因子：
2.5
作者：
Egedal, J.;Schroeder, J.;Lichko, E.
通讯作者：
Lichko, E.
用于激发超热粒子的磁泵模型应用于地球弓形激波的观测
影响因子：
16.6
作者：
Lichko, E.;Egedal, J.
通讯作者：
Egedal, J.