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Experiments on the JET Lower Hybrid Current Drive (LHCD) prototype system have focussed so far on the determination of the performance limits of the system, both in terms of long pulse operation and of replacement of the ohmically driven plasma current. Further experiments have also been carried out to confirm early findings of central electron heating induced by LH when applied in combination with Ion Cyclotron Resonance Heating (ICRH). Long pulse operation has been obtained on JET with 2 MA, 1.9 T limiter plasmas with 1 minute current flat top, where 40% of the required flux is provided by the combined application of the LH and ICRF systems. Full replacement of the inductive current has been observed in 1 MA, 3.4 T ohmic plasmas with 1.9 MW of LH power. Combined application of LH and ICRH leads to full sustainment of the plasma current at 1.5 MA, 3.2 T, with indications of transformer recharging.

Additional information

Authors: BRUSATI M ET AL., JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(91)42 EN (1991) 10 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199210094 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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