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The Influences of the Magnetic Field Strength on the Magnetic Confinement of Primary Electrons in an Ion Source
Author(s) -
Sandonato G. M.,
Lima P. E.,
Maciel H. S.,
Otani C.
Publication year - 1999
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150390302
Subject(s) - electron , atomic physics , magnetic field , magnet , ion , plasma , cusp (singularity) , physics , trapping , magnetic confinement fusion , materials science , nuclear physics , geometry , mathematics , quantum mechanics , tokamak , ecology , biology
Abstract This paper deals with the simulation of trajectories of energetic electrons under the influence of a multi‐cusp magnetic field produced by a permanent magnet assembly in a ring cusp geometry which is designed for supporting a plasma based ion source. The primary electrons are assumed as being emitted from a cathode located coaxially with the cylindrical discharge chamber. The volume of the region occupied by the electron trajectories and the magnetic trapping time were evaluated and plots are presented showing the effects of the surface magnetic field strength of the magnets on the volume and the mean confinement time of primary electrons in the ion source.