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Abstract

A significant data base of RF start-up assist experiments exists using electron cyclotron resonant heating. This experimental data base is reviewed in the Appendix to this report. In contrast, only two experimental studies of start-up assist using lower hybrid waves have been reported (both on stellarators) and only one preliminary experiment using the ion cyclotron range of frequencies. Consequently, the present contract required a conceptual design for a system using electron cyclotron resonant heating. The aim of the work described is to specify a system to preionise the plasma, heat it through the radiation barrier and to provide a means of current profile control. The contract stipulated 10 MW of power for 3 secs at a frequency of 140 GHz with the use of one port. The outcome of the work is that, assuming the existence of sources at the specified frequency, 10 MW for 3 secs appears adequate for the purposes of preionization, start-up assist and profile control. The most critical element in the design is the vacuum window in the transmission line and this will require significant development effort.

Additional information

Authors: LASHMORE DAVIES C N, UKAEA, CULHAM LABORATORY, ABINGDO, OXON. (UK);RIVIERE A C UKAEA, CULHAM LABORATORY, ABINGDO, OXON. (UK), UKAEA, CULHAM LABORATORY, ABINGDO, OXON. (UK)
Bibliographic Reference: WRITE TO CEC BRUXELLES (BELGIUM), DIRECTORATE GENERAL XII FUSION PROGRAMME, MENTIONING NET REPORT NO. 2, (EUR XII-324/2), 1983
Record Number: 1989122049600 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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