端縁磁場を含む扇形分析磁場の3次の幾何収差-1-

概要

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In the electromagnetic mass separator, the larger aperture angle for obtaining higher ion beam currents results in dominant aberrations of higher order and decreas es its practical required resolution. In this paper, taking account of both effects of the fringing field and the entrance-and exit-angles of the central ray to the boundaries of the pole piece, the method of caluculation of trajectories was discussed in a third order approximation for ion beam in a sector type analyzing magnetic field with linear pole piece boundaries and parallel plane pole faces. Space charges may also affect the behavier of ion beam in the mass separator, which will be described in another occasion.
日本質量分析学会の論文