Pulsed multiampere source of negative hydrogen ions

Journal Article · Thu Mar 01 04:00:00 EST 1984 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.34436· OSTI ID:5572710

Bel'chenko, Y I; Dimov, G I

A description is given of a pulsed model of a multiampere honeycomb surface plasma source of negative hydrogen ions (H/sup -/). The H/sup -/ emitter is the cesium-coated cathode surface in a high-current, glow discharge; the surface consists of a large number of spherically concave indentations. The concavity of the emitting surface of the indentation and of the adjacent cathode sheath, where ions are accelerated, ensures two-dimensional geometrical focusing and a 20-fold compression of the H/sup -/ stream from a larger part of the cathode surface into the emission slits of the multiaperture extraction system. A pulsed (0.2 to 0.8 ms) H/sup -/ beam carrying a current in excess of 11 A was produced from 600 indentations with an emitting surface area of approx. 60 cm/sup 2/ and accelerated to 25kV. The gas efficiency of the source was > or approx. = 20%. The thermal loads on the electrodes were < 1 kW/cm/sup 2/.

• Research Organization: Institute of Nuclear Physics, Novosibirsk 90, USSR
• OSTI ID: 5572710
• Report Number(s): CONF-831180-
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 111:1; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular &amp; Chemical Physics-- Beams &amp; their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
ANIONS
BEAM CURRENTS
CATHODES
CESIUM
CHARGED PARTICLES
COATINGS
CURRENTS
DATA
ELECTRIC DISCHARGES
ELECTRODES
ELEMENTS
ENERGY SPECTRA
EXPERIMENTAL DATA
GLOW DISCHARGES
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
INFORMATION
ION SOURCES
IONS
METALS
NUMERICAL DATA
PLASMA
PULSES
SPECTRA
SURFACES