Ion Source Development at the SNS

Journal Article · Mon Sep 26 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3637392· OSTI ID:21611666

Welton, R F; Han, B X; Kenik, E A; Murray, S N; Pennisi, T R; Potter, K G; Lang, B R; Santana, M; Stockli, M P ^[1]; Desai, N J ^[2]

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1. Spallation Neutron Source, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN, 37830-647 (United States)
2. Worcester Polytechnic Institute, Worcester, MA, 01609 (United States)

The Spallation Neutron Source (SNS) now routinely operates near 1 MW of beam power on target with a highly-persistent {approx}38 mA peak current in the linac and an availability of {approx}90%. The {approx}1 ms-long, 60 Hz, {approx}50 mA H{sup -} beam pulses are extracted from a Cs-enhanced, multi-cusp, RF-driven, internal-antenna ion source. An electrostatic LEBT (Low Energy Beam Transport) focuses the 65 kV beam into the RFQ accelerator. The ion source and LEBT have normally a combined availability of {approx}99%. Although much progress has been made over the last years to achieve this level of availability further improvements are desirable. Failures of the internal antenna and occasionally impaired electron dump insulators require several source replacements per year. An attempt to overcome the antenna issues with an AlN external antenna source early in 2009 had to be terminated due to availability issues. This report provides a comprehensive review of the design, experimental history, status, and description of recently updated components and future plans for this ion source. The mechanical design for improved electron dump vacuum feedthroughs is also presented, which is compatible with the baseline and both external antenna ion sources.

• OSTI ID: 21611666
• Journal Information: AIP Conference Proceedings, Vol. 1390, Issue 1; Conference: 2. international symposium on negative ions, beams and sources, Takayama City (Japan), 16-19 Nov 2010; Other Information: DOI: 10.1063/1.3637392; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
07 ISOTOPES AND RADIATION SOURCES
ANTENNAS
BEAM CURRENTS
BEAM PULSERS
BEAM TRANSPORT
DESIGN
ELECTRONS
ELECTROSTATIC ACCELERATORS
HYDROGEN IONS 1 MINUS
ION SOURCES
NEUTRON SOURCES
PLASMA
QUADRUPOLE LINACS
REVIEWS
SPALLATION
ACCELERATORS
ANIONS
CHARGED PARTICLES
CURRENTS
DOCUMENT TYPES
ELECTRICAL EQUIPMENT
ELEMENTARY PARTICLES
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FERMIONS
HYDROGEN IONS
IONS
LEPTONS
LINEAR ACCELERATORS
NUCLEAR REACTIONS
PARTICLE SOURCES
RADIATION SOURCES