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[en] Recent results from a new compact toroid (CT) accelerator at Caltech are reported. The accelerator will be used on the University of Wisconsin Phaedrus-T tokamak to investigate CT injection as a tokamak refuelling scheme. A tantalum outer electrode which tapers from 16.8 cm to 12.7 cm diameter over a 2.1 m length is being used. The inner electrode is tungsten coated copper and has a fixed diameter of 6.4 cm. A number of electrode materials in our device (Cu, Ta, W) as well as different electrode configurations (straight, tapered) have not been tried. The tantalum electrodes can be baked out to 320 deg. C by passing 1 kA of alternating current along its length. Optimum performance has been achieved by He discharge cleaning simultaneous with electrode baking. (author). 6 refs, 4 figs
Source
International Atomic Energy Agency, Vienna (Austria); Proceedings series; 562 p; ISBN 92-0-101293-4; 
; Oct 1993; p. 475-480; IAEA; Vienna (Austria); 14. international conference on plasma physics and controlled nuclear fusion research; Wuerzburg (Germany); 30 Sep - 7 Oct 1992; IAEA-CN--56/G-3-8; ISSN 0074-1884; ; GRANT DE-FG03-86ER53232
; Oct 1993; p. 475-480; IAEA; Vienna (Austria); 14. international conference on plasma physics and controlled nuclear fusion research; Wuerzburg (Germany); 30 Sep - 7 Oct 1992; IAEA-CN--56/G-3-8; ISSN 0074-1884; ; GRANT DE-FG03-86ER53232