Development of large area rf ion sources for fusion applications : Proceedings of the fourth International Conference on Ion Sources
Wells, S. B. ; Takeiri, Y. ; Newman, A. F. ; McAdams, R. ; Holmes, A. J. T.
[S.l.] : American Institute of Physics (AIP)
Published 1992
[S.l.] : American Institute of Physics (AIP)
Published 1992
| ISSN: |
1089-7623
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
Electrical Engineering, Measurement and Control Technology
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| Notes: |
A rf ion source with a large extraction area suitable for fusion applications is considered. The source is a metallic magnetic multipole bucket with an internal antenna to couple the rf (at a frequency of 2 MHz) to the plasma. The source is diagnosed by an array of Langmuir probes to measure uniformity, density, and temperature and a small probe accelerator to extract a negative ion beam. A two-turn antenna is found to couple more power into the plasma than a half-turn antenna. When operated as a negative ion source at low powers, the source efficiency is found to be high and not to have a strong dependence on gas pressure. An extracted negative ion current density of about 4 mA/cm2 at 7 mTorr was obtained when 3 kW of power was coupled into the plasma.
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| Type of Medium: |
Electronic Resource
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| URL: |