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Abstract

The COMPASS experiment is designed to operate in both 'Pinch' and 'Tokamak' modes, the latter with both circular and shaped plasma cross-sections. In Tokamak mode, the primary windings are used as an inductive store with a two-stage opening switch system to transfer the energy to the plasma loop. Three thyristor convertors (total power 17MW) are used to maintain the plasma current, to provide vertical (equilibrium) field and to produce the required plasma shapes (eg, "dee', ellipse). For Pinch operation, a conventional start bank/active crowbar circuit is used to feed a reconfigured winding arrangement. Three high-power (250kW) transistor amplifiers are used to energize other machine windings to provide vertical and radial correction fields for fast control of plasma position. Most of the power supply system is now in manufacture and installation has begun; commissioning of the overall system is scheduled for the second half of 1987.

Additional information

Authors: BOLD D, CULHAM LABORATORY, ABINGDON (UK);EDWARDS D C, CULHAM LABORATORY, ABINGDON (UK);GRAY J W, CULHAM LABORATORY, ABINGDON (UK);HAY J H, CULHAM LABORATORY, ABINGDON (UK);WARDER S E V CULHAM LABORATORY, ABINGDON (UK), CULHAM LABORATORY, ABINGDON (UK)
Bibliographic Reference: 14TH SOFT CONFERENCE, AVIGNON (FRANCE), SEPT. 8-12, 1986 VOL. 1, PP. 847-852 1895 P., 1986, VOL. 1 AND VOL. 2, ISBN 0 08 034935 8 WRITE TO PERGAMON PRESS, HEADINGTON HILL HALL, OXFORD, OX3 0BW (UK), PRICE: UKL 220 (FOR BOTH VOLS.)
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