Low-energy injector design for SSC

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

DOI:https://doi.org/10.1063/1.1142840· OSTI ID:7270994

Anderson, O A; Chan, C F; Leung, K N; Soroka, L; Wells, R P ^[1]

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1. Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)

An injector is being designed for SSC that will deliver 30 mA of H{sup {minus}} at 35 keV, matched to the RFQ input. The H{sup {minus}} ions are produced by a new rf-driven multicusp source that uses no cesium. The ions are extracted by a high-perveance accelerator designed to handle the large electron content of this type of source. The low-energy beam transport system (LEBT) uses electrostatic focusing; gas-neutralized magnetic focusing is ruled out because pulse lengths (7--35 {mu}s) are shorter than plasma buildup times and because pulse intervals are longer than plasma decay times. Plasma buildup is prevented by the LEBT electric fields, so the system is noise free and stable. The advantages of electrostatic LEBTs were demonstrated by a previous design tested at LBL, which showed negligible emittance growth, confirming the results of computer modeling. The object of our new LEBT design is to preserve the emittance of the rf-driven source, which is less than 0.01 {pi} mrad cm (normalized rms), and thereby produce a beam well within the SSC RFQ acceptance of 0.018 {pi} mrad cm.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7270994
• 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
BEAM FOCUSING MAGNETS
BEAM INJECTION
BEAM TRANSPORT
CHARGED PARTICLES
DESIGN
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELECTROSTATIC LENSES
EQUIPMENT
FILTERS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION BEAM INJECTION
ION SOURCES
IONS
LAWRENCE LIVERMORE LABORATORY
LENSES
MAGNETIC FILTERS
MAGNETS
NATIONAL ORGANIZATIONS
RF SYSTEMS
STORAGE RINGS
SUPERCONDUCTING SUPER COLLIDER
US AEC
US DOE
US ERDA
US ORGANIZATIONS