Plasma and Fusion Research

Volume 14, 1201131 (2019)

Rapid Communications


Development of a Frequency Comb Sweep Microwave Reflectometer in the Linear Device PANTA
Boyu ZHANG, Shigeru INAGAKI1,2) and Yuichi KAWACHI
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
1)
Research Center for Plasma Turbulence, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
2)
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
(Received 15 May 2019 / Accepted 4 June 2019 / Published 24 July 2019)

Abstract

A frequency comb sweep microwave reflectometer is developed in PANTA to realize multi-point electron density measurements with high temporal resolution. A radial profile of the electron density is successfully reconstructed from simultaneous 17-point measurements with 2-μs temporal resolution. This result demonstrates the reliability and feasibility of the system for electron density profile diagnostics.


Keywords

plasma diagnosis, microwave reflectometer, electron density profile

DOI: 10.1585/pfr.14.1201131


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