An analysis of ion beam trajectories by using boundary element method

Author

Shirakawa, Shinji ; Igarashi, Hajime ; Honma, Toshihisa

Author_Institution

Dept. of Electr. Eng., Hokkaido Univ., Sapporo, Japan

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

555

Lastpage

558

Abstract

A two-dimensional ion extraction system is studied using the boundary-element method. Ion beam trajectories with their space charge are calculated by solving the equations of motion and the Poisson equation under the assumption of stationary charge flow, and the shape of the plasma boundary is modified until the Child-Langmuir relationship on the boundary surface is satisfied. An ion extraction system with a three-electrodes structure is also investigated. It is shown that the shape of the plasma boundary depends on the variation of extraction voltage, and that it strongly depends on the shape of the first aperture, the extraction voltage, and the plasma density. It is concluded that the proposed algorithm can accurately determine the shape of the plasma boundary

Keywords

boundary-elements methods; ion beams; ion sources; physics computing; plasma simulation; Child-Langmuir relationship; Poisson equation; algorithm; boundary element method; equations of motion; extraction voltage; ion beam trajectories; plasma boundary shape; plasma density; space charge; stationary charge flow; three-electrodes structure; two-dimensional ion extraction system; Boundary element methods; Electrodes; Electrons; Ion beams; Plasma density; Plasma devices; Plasma sources; Plasma temperature; Poisson equations; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106377

Filename

106377