NDLI: Electron Cyclotron emission diagnostics for helical plasma in the large helical device

Content Provider	IEEE Xplore Digital Library
Author	Nagayama, Y. Kawahata, K. Inagaki, S. Morisaki, T. Narihara, K.
Copyright Year	1973
Abstract	Electron cyclotron emission (ECE) diagnostics have been developed in the large helical device (LHD). The ECE is transmitted over 80 m from the antenna to the spectrometer with the corrugated waveguide system, which has a low transmission loss (/spl sim/30%). The polarization of ECE is identical for all frequencies, while the field angle varies from -40/spl deg/ to +30/spl deg/ on the ECE sight line. The ECE temperature measured by the Michelson, which is calibrated with a hot source, agrees well with Thomson scattering measurement in a wide range of the electron density. Magnetic island formation is investigated using the electron temperature profile measured with the Michelson. The radiometer is cross-calibrated to the Michelson and is employed for the study of fast phenomena, such as the sawtooth oscillation. Besides the normal ECE, tangential ECE is investigated in LHD in order to explore the potential of ECE diagnostics.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	1716
Ending Page	1720
Page Count	5
File Size	515693
File Format	PDF
ISSN	00933813
Volume Number	32
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electron emission Cyclotrons Plasma devices Plasma diagnostics Temperature measurement Magnetic field measurement Plasma temperature Density measurement Plasma waves Transmitting antennas
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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