关键词: 磁场的效应, 漂移不稳定性, 轨道

Abstract:

The drift of particle guiding centre caused by curl B in a static inhomogeneous magnetic field is investigated by means of three-dimensional vector arithmetic. The drift related to the charged particle velocity perpendicular to the magnetic field is divided into two terms, respectively described by B curvature and curl B. Consequently the representation of curl B drift in a toroidal magnetic field is given, and the possible effect on orbits of passing particle and trapped particle due to curl B drift in a toroidal magnetic field is discussed. The results demonstrate that the drift due to the charged particle velocity perpendicular to the magnetic field is mainly determined by B curvature, and the effect of the curl B on the drift is minor.

Key words: Magnetic field effects, Drift instability, Orbits