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Abstract

Long pulse ion cyclotron RF heating operation with P-ADD > > P-OMEGA is planned in the forthcoming JET operation. The auxiliary heating power is expected to influence the plasma parameters, in particular the edge density profile, thus modifying the antenna - plasma coupling and therefore the reflected plasma impedance. This effect is expected to be particularly pronounced in large Tokamaks, where the plasma dimensions are large with respect to the wave length in the plasma. The principles of operation of an automatic impedance matching system are described. Matching is achieved during the RF pulse by the combined variation of the transmission line input impedance and by frequency modulation. Results obtained on the JET RF test stand are reported.

Additional information

Authors: BOSIA G, JET JOINT UNDERTAKING, ABINGDON, OXON (UK);JACQUINOT J, JET JOINT UNDERTAKING, ABINGDON, OXON (UK);LALLIA P P, JET JOINT UNDERTAKING, ABINGDON, OXON (UK);REBUT P H, JET JOINT UNDERTAKING, ABINGDON, OXON (UK);SAND F, JET JOINT UNDERTAKING, ABINGDON, OXON (UK);SCHMID M, JET JOINT UNDERTAKING, ABINGDON, OXON (UK);WADE T JET JOINT UNDERTAKING, ABINGDON, OXON (UK), JET JOINT UNDERTAKING, ABINGDON, OXON (UK)
Bibliographic Reference: 4TH INTERNATIONAL SYMPOSIUM ON HEATING IN TOROIDAL PLASMAS, ROMA (ITALY), MARCH 21-28, 1984 VOL. I, PP. 445- 450 1478 P., VOL. I AND VOL. II, 1984 WRITE TO MONOTYPIA FRANCHI, ST. LUCIA + VIALE UMBRIA NO. 28, 06012 CITTA DI CASTELLO, PERUGIA (ITALY), USD 6
Record Number: 1989124026000 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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