Radio frequency power system for inductive heating in ion sources

Author

Kwan, J.W. ; de Vries, G.J. ; Ackerman, G.D. ; Williams, M.D.

Author_Institution

Lawrence Berkeley Lab., CA, USA

Volume

2

fYear

1993

fDate

11-15 Oct 1993

Firstpage

743

Abstract

In the past large ion sources have been operated with filaments in conjunction with a high current arc. Tungsten filaments used in this application have a potential disadvantage of undesirable short life times, and they tend to contaminate the source with tungsten deposits. At Lawrence Berkeley Laboratory we have applied radio frequency (RF) induction to a multicusp negative ion source for many years. The RF generator, isolation transformer, matching circuit and RF induction coil are discussed. An equivalent circuit of the induction coil coupled to the plasma in the source is described. The effect of the induction coil geometry on the source plasma coupling is discussed, and measurements of the RF power transfer to the plasma source are given

Keywords

accelerator RF systems; arcs (electric); electromagnetic induction; fusion reactor design; fusion reactor ignition; fusion reactors; ion sources; particle beam fusion accelerators; plasma production; plasma radiofrequency heating; power supplies to apparatus; RF generator; RF induction coil; RF power transfer; W; equivalent circuit; filaments; fusion reactor; high current arc; inductive heating; isolation transformer; matching circuit; multicusp negative ion source; plasma source; radiofrequency induction; radiofrequency power system; source plasma coupling; Coils; Coupling circuits; Heating; Ion sources; Laboratories; Plasma measurements; Plasma sources; Power systems; Radio frequency; Tungsten;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on

Conference_Location

Hyannis, MA

Print_ISBN

0-7803-1412-3

Type

conf

DOI

10.1109/FUSION.1993.518435

Filename

518435