Plasma-generator-induced effects on the dynamics of a negative-ion surface conversion source

Journal Article · Fri Mar 15 04:00:00 EST 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.348489· OSTI ID:5911528

van Os, C F.A.; Leung, K N; Kunkel, W B ^[1]

---

1. Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (US)

The production of H{sup {minus}} ions at a barium, magnesium, strontium, molybdenum, and lanthanum-hexaboride converter immersed in a hydrogen plasma have been investigated for pulsed and dc discharges. The scaling of the negative-ion output with incident positive-ion current on the converter depends greatly on the actual geometry and type of plasma generator. A less than linear scaling is observed in a multicusp system using filaments or rf to generate the discharge. A more than linear scaling is obtained in a configuration where the filament and the converter are separated by a permanent-magnet filter. For a rf plasma generator, there is a pronounced optimum in the relative position of antenna and converter.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5911528
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:6; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METALS
ANIONS
BARIUM
BORIDES
BORON COMPOUNDS
CHARGED PARTICLES
ELEMENTS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION SOURCES
IONS
LANTHANUM BORIDES
LANTHANUM COMPOUNDS
LAWRENCE BERKELEY LABORATORY
MAGNESIUM
METALS
MOLYBDENUM
NATIONAL ORGANIZATIONS
NEUTRAL BEAM SOURCES
OPERATION
PERFORMANCE
PLASMA
RARE EARTH COMPOUNDS
STRONTIUM
TRANSITION ELEMENTS
US AEC
US DOE
US ERDA
US ORGANIZATIONS