Scattering-based stochastic process attracting electrons inward under antiparallel gradient magnetic fields

摘要

Electron gyration and scattering in a gas under antiparallel gradient magnetic fields (APGMFs) and rf electric field were simulated using a Monte Carlo method to identify the factors of the electron confinement effect of the APGMFs. The inward shift of the gyrocenter at electron scattering worked as an additional factor to electron meandering, which has been regarded as the primary factor of the electron confinement. This scattering-based inward electron attraction occurs by a simple principle that the gyroradius and residence time of electrons become greater under weaker magnetic fields in the inner region of the APGMFs.