On the optical properties of magnetic lenses with fields of the form B(z) ∝ z - n, n = 2, 3, 4
Author: Hawkes, P.W.
Source: Optik International Journal for Light and Electron Optics, Volume 113, Number 6, 1 September 2002 , pp. 273-275(3)
Publisher: Urban & Fischer
Abstract:The trajectories of electrons in magnetic lenses with field distributions in the form of an inverse power law can be expressed in terms of Bessel functions of fractional order. It is shown that the focal lengths and spherical and chromatic aberration coefficients can be evaluated explicitly. The results confirm and elucidate numerical results published by A. V. Crewe .
Document Type: Original article
Publication date: 2002-09-01