Approved for public release; distribution is unlimited. MASTEe Prepared byOak Ridge National Laboratory Oak Ridge, Tennessee 37831-8088 managed by LOCKHEED MARTIN ENERGY RESEARCH COW.

No abstract

A dc negative hydrogen and/or deuterium ioo mure* is seeded to produce high-power, high-energy neutral beam* for alpha diagnostic* and current drive applications in fusion derices. The favorable beam particle energy for inch application* extends to 1.5 MeV/axnu. Continuous-wave (cw) radiofrequency quadrupole (RFQ) accelerators have bees proposed to accelerate negative ions efficiently to this energy range. In this paper, the desired beam properties for ion beams injected into cw RFQ accelerators are summarised. A number of candidate ion sources being developed at Culham, JAERI, LBL, and ORNL may prove useful for these applications. The properties of the Volume Ionixation with Transverse Extraction (VTTEX) ion sources being developed at ORNL are presented. Scaling such a dc ion source co produce ampere beams is discussed.

No abstract

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