Accurate computation of magnetic lenses with FOFEM

被引：13

作者：

Lencová, B ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Sci Instruments, Brno 61264, Czech Republic

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1999年 / 427卷 / 1-2期

关键词：

potential and field computations; finite element method; magnetic lenses; saturated magnetic lenses; accuracy of field computation;

D O I：

10.1016/S0168-9002(98)01551-4

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

First-order finite element method (FOFEM) is used for computations of rotationally symmetric magnetic electron lenses with saturated materials. An overview of local and global errors in the axial Aux density distribution in the first-order finite element method is given, and the coefficient computation in FOFEM providing the best axial fields are shown. The quality of computed results is illustrated on several typical problems. It is shown that with graded dense mesh accurate results can be obtained fast and with small memory requirements. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：329 / 337

页数：9

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