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Abstract

Significant progress has been made in clarifying some basic issues of ICRH. Although no firm experimental proof has been presented, as yet, as to the role of coaxial modes in the production of impurities during ICRH operation, we have now means to suppress this potentially harmful contribution to the antenna coupling. The shaping of k-" might be considered the best way to achieve this goal considering the fact that it allows furthermore to tune to those Fourier components that provide optimal heating quality (single pass conditions, preferential heating of specific species, etc.). Codes have been, or are being, developed that allow to derive genuine deposition profiles where a complete connection is made between the generator and the plasma inside. Codes based on full wave solutions carry the most promise in that they can correctly deal with mode conversion and probably also with wave edge interactions. As long as these codes however are not made in toroidal geometry and have mastered the numerical complexity resulting from that, ray tracing codes remain very valuable tools. Complex ray tracing and appropriate treatments at mode confluence could in fact make them as versatile as the full wave codes. The problems of transport induced by ICRH and of rf plasma edge interaction should be studied much more rigorously than in the past.

Additional information

Authors: WEYNANTS R R LABORATOIRE DE PHYSIQUE DES PLASMAS, ECOLE ROYALE MILITAIRE, BRUXELLES (BELGIUM), LABORATOIRE DE PHYSIQUE DES PLASMAS, ECOLE ROYALE MILITAIRE, BRUXELLES (BELGIUM)
Bibliographic Reference: 4TH INTERNATIONAL SYMPOSIUM ON HEATING IN TOROIDAL PLASMAS, ROMA (ITALY), MARCH 21-28, 1984 VOL. I, PP. 211- 241 1478 P., VOL. I AND VOL. II, 1984 WRITE TO MONOTYPIA FRANCHI, ST. LUCIA + VIALE UMBRIA NO. 28, 06012 CITTA DI CASTELLO, PERUGIA (ITALY), USD65
Record Number: 1989124024900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en