H{sup -} Ion Source Development for the LANSCE Accelerator Systems
- AOT Division, Los Alamos National Laboratory, P.O. Box 1663-MS H817, Los Alamos, NM 87545 (United States)
Employment of H- ion sources for the LANSCE accelerator systems goes back about 20 years, to the construction of the Proton Storage Ring (PSR). The standard ion source consists of a filament driven multi-cusp discharge vessel with a biased converter electrode for negative-ion production and an 80-kV extraction system feeding into a 670-kV electrostatic pre-accelerator. The source typically delivers 18 mA pulsed beam current into the pre-accelerator column and reaches up to 35 days between services at 60 Hz pulse repetition rate. Recent development efforts with this source have been dedicated to improved filament material, improved cesium oven geometry and operating the source at elevated temperatures. A second line of development focuses on filament-less devices driven by a helicon discharge. Performance data obtained with the standard source as well as key results for the helicon experiments are given in this paper; the helicon work is discussed in a separate paper in much greater detail.
- OSTI ID:
- 21269095
- Journal Information:
- AIP Conference Proceedings, Vol. 1097, Issue 1; Conference: 1. international symposium on negative ions, beams and sources, Aix-en-Provence (France), 9-12 Sep 2008; Other Information: DOI: 10.1063/1.3112509; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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