title: Development of frequency modulation reflectometer for KSTAR tokamak: data analysis based on Gaussian derivative wavelet.
abstract: A frequency modulation reflectometer has been developed to measure the density profile of the KSTAR tokamak. It has two channels operating in X-mode in the frequency range of Q band (33-50 GHz) and V band (50-75 GHz). The full band is swept in 20 μs. The mixer output is directly digitized at the sampling rate of 100 MSamples∕s. A new phase detection algorithm is developed to analyze both amplitude and frequency modulated signal. The algorithm is benchmarked for a synthesized amplitude modulation-frequency modulation signal. This new algorithm is applied to the data analysis of KSTAR reflectometer.
authors.affiliation: Diagnostics Research Team, National Fusion Research Institute, Daejeon 305-333, South Korea. shseo@nfri.re.kr
authors.forename: Seong-Heon
authors.initials: SH
authors.lastname: Seo
authors.forename: K D
authors.initials: KD
authors.lastname: Lee