TEMPERATURE-FLUCTUATION MEASUREMENTS WITH ECE AT W7-AS

Citation
Hj. Hartfuss et al., TEMPERATURE-FLUCTUATION MEASUREMENTS WITH ECE AT W7-AS, Fusion engineering and design, 34-5, 1997, pp. 81-87
Citations number
5
Categorie Soggetti
Nuclear Sciences & Tecnology
ISSN journal
09203796
Volume
34-5
Year of publication
1997
Pages
81 - 87
Database
ISI
SICI code
0920-3796(1997)34-5:<81:TMWEAW>2.0.ZU;2-J
Abstract
The diagnostic problem of measuring electron temperature fluctuations with a relative level below 1% is outlined. It is shown that correlati on radiometry of electron cyclotron emission provides sufficient sensi tivity to overcome the limit set by intensity fluctuations of thermal radiation. The experimental set-up used for the first measurements is described and the first results obtained at the W7-AS stellarator are presented. With an extended arrangement a first comparison between the two different correlation schemes as developed at W7-AS and at TEXT b ecame possible. (C) 1997 Elsevier Science S.A.