Effect of a magnetic filter on hydrogen ion species in a multicusp ion source
Rev. Sci. Instrum. 52, 1452 (1981); doi:10.1063/1.1136474
Issue Date: October 1981
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Hydrogen ion species and discharge characteristics have been compared for two different magnet geometries in a multicusp ion source. One magnet configuration indicated that the H
ion percentage in the extracted beam could be reduced by eliminating the high energy ionizing electrons near the ion extraction region. To accomplish this and maintain the desired features of both magnet geometries, a magnetic filter was installed near the source exit. With this combined arrangement, we found that the H+ ion percentage and discharge condition were much improved and a more uniform density profile across the extraction plane was achieved. The atomic species fraction can then be further enhanced by the addition of low-energy (~16 eV) primary electrons into the source plasma chamber.
Review of Scientific Instruments is copyrighted by The American Institute of Physics.
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KEYWORDS and PACS
ION SOURCES,
HYDROGEN IONS,
MAGNETIC ANALYZERS,
FILTERS,
CUSPED GEOMETRIES,
ELECTRIC DISCHARGES,
COMPARATIVE EVALUATIONS,
MAGNETS,
GEOMETRY,
QUANTITY RATIO,
BEAM EXTRACTION,
ELECTRONS,
DATA,
CHARGE DENSITY,
SPATIAL DISTRIBUTION
- 29.25.Cy
Experimental methods and instrumentation for elementary-particle and nuclear physics Particle sources and targets; preparation and technology Ion sources: positive, negative, and polarized - 41.80.Gg
Electricity and magnetism: fields and charged particles Particle beams and particle optics Ion beams and ion optics - YEAR: 1981
RELATED DATABASES
PUBLICATION DATA
0034-6748 (print)
1089-7623 (online)
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