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Abstract

One of the most striking consequences of Alfven Wave Heating in TCA is a large increase in the electron density during the rf pulse. Although a small increase is characteristic of rf heating in ICRF and the lower hybrid current drive, the magnitude of the density increase seen during AWH is astonishing (up to 300% of the target density with 200 KW of rf power). Despite many changes to the design and materials of both the limiter and antenna, all of which have greatly modified the impurity behaviour and consequently the heating efficiency, the density rise has persisted since the earliest TCA experiments. In this paper, the authors demonstrate the density rise as a function of controllable parameters (target density, plasma current, rf power and antenna phasing), as well as discussing how such an increase could be explained by conventional models of particle balance.

Additional information

Authors: COLLINS G A, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);JOYE B, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);LISTER J B, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);MORET J M CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND), CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND)
Bibliographic Reference: 12TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, BUDAPEST (HUNGARY), SEPT. 2-6, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32046 ORA
Availability: Can be ordered online
Record Number: 1989123097600 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en