Broadband radiometer system with fast frequency switching synthesizer for electron cyclotron emission measurements in LHD

Author

Idei, Hiroshi ; Inagaki, Shigeru ; Kawasaki, Shohji ; Zushi, Hideki ; Nagayama, Yoshio ; Kawahata, Kazuo ; Shimozuma, Takashi ; Wataya, Yuichi

Author_Institution

Kyushu Univ., Fukuoka

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

387

Lastpage

388

Abstract

The broadband fast frequency-switching heterodyne radiometers have been developed to measure simultaneously three-band components of electron cyclotron emission with high time and frequency resolutions in the large helical device (LHD). The fast frequency-switching system was prepared as a local oscillator part of the heterodyne radiometers. The frequency switching time was 10 mus. The fundamental electron cyclotron emission spectrum was successfully measured using the radiometer in the LHD experiment.

Keywords

cyclotron radiation; electron emission; radiometers; LHD; broadband radiometer system; electron cyclotron emission measurements; electron cyclotron emission spectrum; fast frequency switching synthesizer; frequency-switching heterodyne radiometers; large helical device; local oscillator; Amplitude modulation; Cyclotrons; Electron emission; Frequency measurement; Frequency synthesizers; Local oscillators; Microwave radiometry; Plasma measurements; Plasma temperature; Power harmonic filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on

Conference_Location

Cardiff

Print_ISBN

978-1-4244-1438-3

Type

conf

DOI

10.1109/ICIMW.2007.4516545

Filename

4516545