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Abstract

The JET power supplies can be divided into two main groups: the power supplies to feed all the coils for the tokamak and the power supplies for the heating systems on JET. Most of these power supplies are of a conventional design with classical thyristor rectifiers either in the starpoint configuration or as a three phase bridge at the output of the transformer. Over the last couple of years several fast power supplies have been designed and installed using GTO and IGBTs. The first of these is the disruption feedback amplifier system (DFAS) which will be used in experiments to investigate disruptions and how they can be stabilised. The second power supply is the fast radial field amplifier (FRFA), replacing the old thyristor radial field amplifier, which is not fast enough to cope with the more demanding situations for the control of the vertical position of the plasma after the installation of the divertor coils. The third power supply is for the glow discharge cleaning. This power supply was installed last year to provide more power to the new glow discharge cleaning system used for cleaning the inner wall of the vessel.

Additional information

Authors: CLAESEN R, JET Joint Undertaking, Abingdon, Oxon. (GB);BONICELLI T, JET Joint Undertaking, Abingdon, Oxon. (GB);ÖSTRÖM R, JET Joint Undertaking, Abingdon, Oxon. (GB);MCBRYAN H, JET Joint Undertaking, Abingdon, Oxon. (GB);ZULLO G, JET Joint Undertaking, Abingdon, Oxon. (GB);OSTROM R, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(94)67 EN (1994) 7 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199510458 / Last updated on: 1995-04-11
Category: PUBLICATION
Original language: en
Available languages: en
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