title: Microwave Doppler reflectometer system in LHD.
abstract: In order to measure the poloidal rotation velocity, a Doppler reflectometer has been developed in Large Helical Device (LHD). A remotely controlled antenna tilting system has been installed in an LHD vacuum vessel. A synthesizer is used as the source, and the operation microwave frequency ranges are ka-band and V-band. In LHD last experimental campaign we obtained the Doppler shifted signal, which was consistent with CXRS measurements.
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Japan. tokuzawa@nifs.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Tokuzawa
authors.forename: A
authors.initials: A
authors.lastname: Ejiri
authors.forename: K
authors.initials: K
authors.lastname: Kawahata
authors.forename: K
authors.initials: K
authors.lastname: Tanaka
authors.forename: I
authors.initials: I
authors.lastname: Yamada
authors.forename: M
authors.initials: M
authors.lastname: Yoshinuma
authors.forename: K
authors.initials: K
authors.lastname: Ida
authors.forename: C
authors.initials: C
authors.lastname: Suzuki