Cesiated porous molybdenum converter for intense negative ion sources

Journal Article · Sat Dec 31 23:00:00 EST 1983 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1137596· OSTI ID:5388968

Alessi, J G; Hershcovitch, A; Sluyters, T

Maintaining the proper low work function surface in steady-state high-current-density negative ion sources is difficult, due to intense ion bombardment of the surface. Experiments were performed in which liquid cesium was forced through a porous molybdenum converter in order to obtain a low work function, while at the same time allowing the surface to be cooled. In a small steady-state hollow cathode discharge source, the H/sup -/ yield from a porous molybdenum converter was five fold higher than from a solid molybdenum converter which relied on the conventional method of cesium coverage by vapor deposition.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 5388968
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 55:1; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
ANIONS
CATHODES
CESIUM
CHARGED PARTICLES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COATINGS
COLLISIONS
DEPOSITION
DESORPTION
ELECTRODES
ELECTRON TUBES
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
FUNCTIONS
HOLLOW CATHODES
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION COLLISIONS
ION SOURCES
IONS
LIQUID METALS
LIQUIDS
MAGNETRONS
MATERIALS
METALS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
MOLYBDENUM
PLASMA
PLASMA PRODUCTION
POROUS MATERIALS
SPUTTERING
SURFACE COATING
TRANSITION ELEMENTS
VAPOR DEPOSITED COATINGS
WORK FUNCTIONS