title: BEM simulation of Wien filters.
abstract: The boundary element method can provide accurate solutions to the electromagnetic problem in numerical simulations of electron optics devices. In this paper, we describe our approach, which applies a subsectional-bases method to generate a boundary division, representing the shape and behaviour of the Wien filter precisely. We investigate by direct ray tracing the origin of the second-order geometrical aberrations of this filter and propose new designs to reduce them.
authors.affiliation: Departamento de Fisica Aplicada III, Fac. de Fisica, Universidad Complutense, 28040 Madrid, Spain. genoveva@fis.ucm.es
authors.forename: G
authors.initials: G
authors.lastname: Martínez
authors.forename: K
authors.initials: K
authors.lastname: Tsuno