RF gas plasma source development for heavy ion fusion
Presently the Heavy Ion Fusion Virtual National Laboratory is researching ion sources and injector concepts to understand how to optimize beam brightness over a range of currents (50-2000 mA argon equivalent). One concept initially accelerates millimeter size, milliamp beamlets to 1 MeV before merging them into centimeter size, ampere beams. Computer simulations have shown the final brightness of the merged beams is dominated by the emittance growth of the merging process, as long as the beamlets ion temperature is below a few eV. Thus, a RF multicusp source capable of high current density can produce beams with better brightness compared to ones extracted from a colder source with a large aperture and lower current density. As such, experiments have begun to develop a RF multicusp source capable of delivering one amp of extracted beam current. It is expected that it will require 10 kW of 13 MHz RF power delivered via a quartz shielded, one and half turn, four inch diameter antenna. Important considerations in the development of the source include the dependence of current density and beam ion temperature on consumed RF power and gas pressure. A fast rise time ({approx}100 ns) for the extracted beam pulse must also be achieved. Progress on these experiments will be presented.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Fusion EnergySciences, Lawrence Livermore National Laboratory
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 860453
- Report Number(s):
- LBNL-49671; HIFAN 1155; R&D Project: Z41001; BnR: AT5015031; TRN: US200602%%340
- Resource Relation:
- Conference: International Conference on Ion Sources ICC,Oakland, CA, 09/3-7/2002
- Country of Publication:
- United States
- Language:
- English
Similar Records
High current density beamlets from RF Argon source for heavy ion fusion applications
High Current Density Beamlets from an RF Argon Source for Heavy Ion Fusion Applications