Ka-band Microwave Frequency Comb Doppler Reflectometer System for the Large Helical Device

Ka-band Microwave Frequency Comb Doppler Reflectometer System for the Large Helical Device

A ka-band multi-channel Doppler reflectometer system was constructed for the Large Helical Device (LHD) using a comb frequency generator as a source. A filter bank system is utilized for precise quadrature phase detection, and preliminary back-scattered waves were obtained in LHD plasma experiments....

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Veröffentlicht in:Plasma and Fusion Research 2014/12/26, Vol.9, pp.1402149-1402149
Hauptverfasser: TOKUZAWA, Tokihiko, INAGAKI, Shigeru, EJIRI, Akira, SOGA, Ryota, YAMADA, Ichihiro, KUBO, Shin, YOSHINUMA, Mikiro, IDA, Katsumi, SUZUKI, Chihiro, TANAKA, Kenji, AKIYAMA, Tsuyoshi, KASUYA, Naohiro, ITOH, Kimitaka, WATANABE, Kiyomasa, YAMADA, Hiroshi, KAWAHATA, Kazuo, Group, LHD Experiment
Format: Artikel
Sprache:eng
Schlagworte:
density fluctuation
Doppler reflectometer
frequency comb
microwave
poloidal velocity
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Zusammenfassung:A ka-band multi-channel Doppler reflectometer system was constructed for the Large Helical Device (LHD) using a comb frequency generator as a source. A filter bank system is utilized for precise quadrature phase detection, and preliminary back-scattered waves were obtained in LHD plasma experiments. In addition, a direct digital signal acquisition system was successfully demonstrated for providing a greater number of multi-channel measurements.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.9.1402149