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Abstract

THE CURRENT DISTRIBUTION AND THE ASSOCIATED POLOIDAL FIELD PLAY A CENTRAL ROLE IN A TOKAMAK BY PROVIDING POWER INPUT TO THE PLASMA, FORMING A MAGNETIC CONTAINER AND DETERMINING THE APPEARANCE OF MHD INSTABILITIES. ROUTINE MEASUREMENTS OF THE POLOIDAL FIELD PATTERN IN A WIDE RANGE OF PLASMA PARAMETERS HAVE BEEN ACHIEVED SO FAR ONLY BY FAR INFRA-RED POLARIMETRY. THE EXPERIMENTAL TECHNIQUE, THE FARADAY ROTATION AND THE DATA ANALYSIS ARE DESCRIBED IN THIS REPORT, TOGETHER WITH ILLUSTRATIONS OF THE RESULTS OBTAINED. CURRENT DENSITY DECAYS RAPIDLY TOWARDS THE PLASMA BOUNDARY SO THE METHOD FAILS IN THIS AREA. SAWTOOTH INSTABILITIES IN THE PLASMA CORE HOWEVER CAN EASILY BE STUDIED BY THIS DIAGNOSTIC.

Additional information

Authors: SOLTWISCH H KFA, JUELICH, D, KFA, JUELICH, D
Bibliographic Reference: EUROPHYSICS, VOL. 19, PP 8-10, 1988
Record Number: 1989126217900 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en