High Intensity Source of He Negative Ions
- Muons, Inc., Batavia, IL (United States)
- BINP, Novosibirsk, Russia
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
He- ion can be formed by an attachment of additional electron to the excited metastable 23S1 He atom. Electron affinity in this metastable He- ion is A=0.08 eV with excitation energy 19.8 eV. Production of He- ions is difficult because the formation probability is very small but destruction probability is very high. Efficiency of He- ions generation was improved by using of an alkali vapor targets for charge exchange He- sources. Low current He- beams were used in tandem accelerators for research and technological diagnostics (Rutherford scattering). The development of high-intensity high-brightness arc-discharge ion sources at the Budker Institute of Nuclear Physics (BINP) has opened up an opportunity for efficient production of more intense and more brighter He- beam which can be used for alpha particles diagnostics in a fusion plasma and for realization of a new type of a polarized 3He? ion source. This report discusses the high intense He- beams production and a polarized 3He? ion source based on the large difference of extra-electron auto-detachment lifetimes of the different 3He? ion hyperfine states.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1968591
- Report Number(s):
- JLAB-ACP-15-2173; DOE/OR/23177-3670
- Resource Relation:
- Conference: IPAC 2015, Richmond, VA (United States), 3-8 May 2015
- Country of Publication:
- United States
- Language:
- English
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