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Author Lee, J. H. ♦ Doyle, E. J. ♦ Peebles, W. A. ♦ Rhodes, T. L. ♦ Luhmann, N. C. (Jr.) ♦ Ikezi, H. ♦ Petty, C. C. ♦ Pinsker, R. I.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ CURRENT-DRIVE HEATING ♦ PLASMA DENSITY ♦ TOKAMAK DEVICES ♦ FLUCTUATIONS ♦ GHZ RANGE 01-100 ♦ ELECTRIC FIELDS ♦ MICROWAVE EQUIPMENT ♦ PLASMA DIAGNOSTICS
Abstract Coherent density fluctuations induced by rf electric fields have been successfully observed using an upgraded reflectometer system on DIII-D. The method utilizes spatially localized X{endash}mode reflectometry (65{endash}73 GHz) measurements to detect coherent density fluctuations driven by the fast wave (FW) electric field. These fluctuations at the FW frequency (60{endash}120 MHz on DIII-D) are detected using heterodyne techniques. The directional nature of the FW launch has been experimentally verified at a position close to the FW antenna; the reflectometer signal is enhanced for a fast wave launch directed towards the detection position. Large spatial and temporal signal variations are observed, which may be related to the detailed internal FW electric field structure. {copyright} {ital 1996 American Institute of Physics.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-02-01
Publisher Department General Atomics
Publisher Place United States
Volume Number 355
Issue Number 1
Technical Publication No. CONF-9505105-
Organization General Atomics


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