Performance of a BNL-type H[sup [minus]] ion source with circular permanent magnet cusps

Conference · Mon Oct 05 04:00:00 EDT 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6699629

Larsson, A M; Meitzler, C R ^[1]

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1. Physics Department, Sam Houston State University, Huntsville, TX 77341 (United States)

A BNL-type toroidal H[sup [minus]] source with circular permanent magnet cusps has been designed and tested. The volume of the plasma chamber is 452 cm[sup 3]. The source plasma is created by a discharge initiated from a 1 mm diameter hot tungsten filament. The discharge was operated in a pulsed mode with a maximum pulse length of 300 [mu]sec, and a maximum discharge voltage of 200 V. For these tests, the source body was biased in the range of 1--10 kV. A permanent magnet mass filter was used to separate the extracted H[sup [minus]] ions from the electrons. We have observed a maximum current density of 16 mA/cm[sup 2] with an e/H[sup [minus]] ratio of 16 when the operation conditions were as follows; an arc voltage of 190 V, 60 A filament current, and 10 kV extraction. The source pressure at the maximum output was estimated to be 8.2 mTorr.

• OSTI ID: 6699629
• Report Number(s): CONF-921145--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 287:1
• Country of Publication: United States
• Language: English

Related Subjects

661220* -- Particle Beam Production & Handling
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANIONS
ANNULAR SPACE
BEAMS
CHARGED PARTICLES
CLOSED CONFIGURATIONS
CONFIGURATION
DESIGN
ELECTRON DENSITY
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION BEAMS
ION DENSITY
ION SOURCES
IONS
MAGNETIC FIELD CONFIGURATIONS
MAGNETS
PULSE TECHNIQUES
SPACE
TOROIDAL CONFIGURATION
Ta
Targets-- (1992-)