BNL volume H sup minus source

Journal Article · Wed Apr 01 04:00:00 EST 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1142833· OSTI ID:7270995

Prelec, K; Alessi, J G ^[1]

---

1. AGS Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

The volume H{sup {minus}} ion source under development at Brookhaven is unique in that it has a toroidal plasma region, which feeds ions into the central extraction region through a conically shaped filter field. In pulsed operation, it produces 25 mA of H{sup {minus}} in a 1 cm{sup 2} aperture, with an electron-to-H{sup {minus}} ratio of {approx}3. At 19 mA, a normalized, 90% emittance of 0.44 {pi} mm mrad has been measured. Up to 50 mA has been extracted through a 1.87 cm{sup 2} aperture. Although not designed for steady state operation, up to 6 mA has been extracted dc. The addition of xenon to the discharge was found to improve the source output by 20%--70%. The circular magnetic cusp field geometry was found to be more favorable than radial cusp fields.

• OSTI ID: 7270995
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:4; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301* -- Particle Accelerators-- Ion Sources
ANIONS
ANNULAR SPACE
BEAM CURRENTS
BEAM EXTRACTION
BNL
CHARGED PARTICLES
CLOSED CONFIGURATIONS
CONFIGURATION
CURRENTS
CUSPED GEOMETRIES
DESIGN
DISCHARGE CANALS
FILTERS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION SOURCES
IONS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FILTERS
MILLI AMP BEAM CURRENTS
NATIONAL ORGANIZATIONS
OPEN CONFIGURATIONS
SPACE
TOROIDAL CONFIGURATION
US AEC
US DOE
US ERDA
US ORGANIZATIONS