[Table of Contents]

Plasma and Fusion Research

Volume 8, 1201171 (2013)

Rapid Communications

Measurement of Dynamical Density Profiles Using a Microwave Frequency Comb Reflectometer
Shigeru INAGAKI1,2), Kimitaka ITOH2,3), Takuma YAMADA2,4), Sanae-I. ITOH1,2), Tokihiko TOKUZAWA1,3), Akihide FUJISAWA1,2), Naohiro KASUYA1,2), Makoto SASAKI1,2), Yoshihiko NAGASHIMA1,2) and Hiroyuki ARAKAWA5)
1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
2)
Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
3)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
4)
Faculty of Arts and Science, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
5)
Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 Japan
(Received 26 July 2013 / Accepted 27 September 2013 / Published 27 December 2013)

Abstract

We propose the use of a microwave comb for measuring the density profile as a continuous function of radius with high temporal resolution. The analysis focuses on phase-sensitive convolution of the reflected waves: convolution of pulses can eliminate statistical noise. The time resolution for constructing the density profile is also discussed.

Keywords

dynamical density profile, microwave frequency comb reflectometer, multiple scale turbulence, statistical variation of gradient

DOI: 10.1585/pfr.8.1201171

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References

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This paper may be cited as follows:

Shigeru INAGAKI, Kimitaka ITOH, Takuma YAMADA, Sanae-I. ITOH, Tokihiko TOKUZAWA, Akihide FUJISAWA, Naohiro KASUYA, Makoto SASAKI, Yoshihiko NAGASHIMA and Hiroyuki ARAKAWA, Plasma Fusion Res. 8, 1201171 (2013).