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Abstract

This paper is centred on a detailed analysis of the synergistic effects of combined co-injection and ICRH in TEXTOR with respect to heating and confinement, and the generation of non-inductively driven currents. A first section gives a short description of the theoretical codes which are used for the interpretation of the experimental observations. These include a Fokker-Planck code which computes the ion beam velocity distribution function in presence of ICRH (omega = n omega(CD) interaction; n = 1, 2, 3...) and a wave equation code which evaluates the distribution of the RF absorbed power among the ion beam and the different plasma species (e, H, D). Simulations by the code system TRANSP are used regularly to describe the interaction of the beam with the target plasma and particularly for the interpretation of the generation of non-inductively driven currents. The synergy occurs through modifications of the target plasma parameters both for NBI and ICRH and to a lesser extent through the direct interaction of the RF on the beam (at omega = 2 omega(CD)). A first account of the current drive results has been given and the interaction of RF with the beam at omega = 3 omega(CD) is described. For this scenario minority heating is absent and the effects of the direct interaction with the beam are more important.

Additional information

Authors: MESSIAEN A M ET AL., Ecole Royale Militaire, Bruxelles (BE);CONRADS H ET AL., Forschungszentrum Jülich GmbH, Institut für Plasmaphysik (DE);HILLIS D L, Oak Ridge National Laboratory (US);OYEVAAR T, FOM Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein (NL);TAMMEN H F, FOM Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein (NL)
Bibliographic Reference: Article: Plasma Physics Controlled Fusion, Vol. 35 (1993) pp. 15-34
Record Number: 199310660 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en