Performance characterization of rf-driven multicusp ion sources

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1146757· OSTI ID:279238

Perkins, L T; De Vries, G J; Herz, P R; Kunkel, W B; Leung, K N; Pickard, D S; Wengrow, A; Williams, M D ^[1]

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1. Lawrence Berkeley National Laboratory, University of California at Berkeley, Berkeley, California 94720 (United States)

Radio-frequency (rf)-driven multicusp ion sources have been developed extensively at Lawrence Berkeley National Laboratory (LBNL) for many applications, each requiring specific source designs. These uses have ranged from large ion sources for neutral-beam injectors{emdash}several tens of centimeters in size{emdash}to small sources for oil-well logging neutron tubes{emdash}a few centimeters in diameter. The advantages associated with internal antenna, rf-driven ion sources include reliability, long component life, ease of operation, and the ability to generate plasmas free of the impurities commonly found in hot-filament discharge sources. We have investigated and characterized the performance of rf-driven sources with respect to the rf operating frequency and ion source size for hydrogen ion species and current density. Furthermore, we have included in this study the aspects of proper coupling of the rf generator to the antenna through an impedance matching network. Finally, critical issues pertaining to general rf operation including beam extraction, rf shielding, and cooling of transformer cores are discussed.

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 279238
• Report Number(s): CONF-9509125--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 67; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BEAM CURRENTS
BEAM EXTRACTION
CUSPED GEOMETRIES
HYDROGEN IONS
ION SOURCES
MHZ RANGE 01-100
PERFORMANCE TESTING
PLASMA
RF SYSTEMS