Next Generation H{sup -} Ion Sources for the SNS

Journal Article · Thu Mar 12 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3112511· OSTI ID:21269097

Welton, R F; Stockli, M P; Murray, S N; Crisp, D; Carmichael, J; Goulding, R H; Han, B; Pennisi, T; Santana, M ^[1]; Tarvainen, O ^[2]

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1. Spallation Neutron Source, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN, 37830 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico, 87545 (United States)

The U.S. Spallation Neutron Source (SNS) is the leading accelerator-based, pulsed neutron-scattering facility, currently in the process of ramping up neutron production. In order to insure meeting operational requirements as well as providing for future facility beam power upgrades, a multifaceted H- ion source development program is ongoing. This work discusses several aspects of this program, specifically the design and first beam measurements of an RF-driven, external antenna H- ion source based on an A1N ceramic plasma chamber, elemental and chromate Cs-systems, and plasma ignition gun. Unanalyzed beam currents of up to {approx}100 mA(60 Hz, 1 ms) have been observed and sustained currents >60 mA(60 Hz, 1 ms) have been demonstrated on the test stand. Accelerated beam currents of {approx}40 mA have also been demonstrated into the SNS front end. Data are also presented describing the first H- beam extraction experiments from a helicon plasma generator based on the Variable Specific Impulse Magnetoplasma Rocket (VASIMR) engine design.

• OSTI ID: 21269097
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1097; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ANTENNAS
BEAM CURRENTS
BEAM EXTRACTION
CERAMICS
CHROMATES
HYDROGEN IONS 1 MINUS
ION SOURCES
NEUTRON DIFFRACTION
NEUTRON SOURCES
PLASMA
PLASMA GUNS
SPALLATION
THERMONUCLEAR IGNITION