BEM simulation of Wien filters.
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.
Martínez
G
G
Departamento de Fisica Aplicada III, Fac. de Fisica, Universidad Complutense, 28040 Madrid, Spain. genoveva@fis.ucm.es
Tsuno
K
K