有磁场存在时的电子-离子二元碰撞
Electron-ion binary collisions in the presence of a magnetic field
摘要：
从电子的无扰螺旋运动出发，用二阶微扰理论研究了离子和电子在外加磁场中的二元碰撞。计算中采用了一种对任何磁场强度都一致有效的改进的BC方法，并在不指定相互作用势的情况下，在Fourier空间中处理了相互作用中的二阶能量和速度传递。能量转移是明确计算的正则化和屏蔽势，这是有限范围和更少的奇异比库仑相互作用在原点和极限情况下涉及德拜（即，屏蔽）和库仑势。文中详细考虑了两种特殊情况：（1）离子平行于任意强度的磁场运动。能量转移涉及电子回旋运动的所有谐波。(ii)当电子回旋半径远小于其他特征长度尺度（例如，屏蔽长度、电子螺旋的节距等）。在后一种情况下，能量转移接受两个贡献，这是负责电子引导中心和回旋加速器轨道扰动。
英文摘要：
Binary collisions between ions and electrons in an external magnetic field are considered in second-order perturbation theory, starting from the unperturbed helical motion of the electrons. The calculations are done with the help of an improved BC which is uniformly valid for any strength of the magnetic field and the second-order energy and velocity transfers are treated in the interaction in Fourier space without specifying the interaction potential. The energy transfer is explicitly calculated for a regularized and screened potential which is both of finite range and less singular than the Coulomb interaction at the origin and as the limiting cases involves the Debye (i.e., screened) and Coulomb potentials. Two particular cases are considered in detaile: (i) Ion motion parallel to the magnetic field with an arbitrary strength. The energy transfer involves all harmonics of the electron cyclotron motion. (ii) The ion arbitrary motion with respect to the strong magnetic field when the electron cyclotron radius is much smaller than other characteristic length scales (e.g., screening length, pitch of electron helix etc.). In the latter case the energy transfer receives two contributions which are responsible for the electron guiding center and cyclotron orbit perturbations.
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。
