Importance of heavy ion bombardment for H/sup -/ formation in surface conversion sources
Journal Article
·
· Appl. Phys. Lett.; (United States)
The interaction between the plasma and the converter in a surface conversion negative ion source is studied. The converter consists of a porous tungsten button, through which liquid cesium diffuses towards the surface. This scheme results in a low cesium density in the discharge. Xe/sup +/ and Ar/sup +/ ions are used to simulate the sputtering effect of Cs/sup +/ ion bombardment of the converter. The extracted H/sup -/ beam energy profile and the conversion efficiency appeared to depend strongly on the heavy ion flux to the converter surface. The total H/sup -/ current increases with an order of magnitude with increasing heavy ion flux. A maximum current density of 8 mA/cm/sup 2/ of H/sup -/ ions has been extracted.
- Research Organization:
- Association EURATOM-FOM, FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
- OSTI ID:
- 6925742
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 50:11; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANIONS
BEAM CURRENTS
BEAM PRODUCTION
BEAM-PLASMA SYSTEMS
BEAMS
CHARGED PARTICLES
CURRENT DENSITY
CURRENTS
DIRECT ENERGY CONVERTERS
ELEMENTS
FABRICATION
HYDROGEN 1 MINUS BEAMS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION BEAMS
ION SOURCES
IONS
METALS
THERMIONIC CONVERTERS
TRANSITION ELEMENTS
TUNGSTEN
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANIONS
BEAM CURRENTS
BEAM PRODUCTION
BEAM-PLASMA SYSTEMS
BEAMS
CHARGED PARTICLES
CURRENT DENSITY
CURRENTS
DIRECT ENERGY CONVERTERS
ELEMENTS
FABRICATION
HYDROGEN 1 MINUS BEAMS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION BEAMS
ION SOURCES
IONS
METALS
THERMIONIC CONVERTERS
TRANSITION ELEMENTS
TUNGSTEN