Multi-Channel Microwave Reflectometer with Fermi Antenna Receivers

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Author(s)

    • HATTORI Kunihiko
    • Department of Electrical Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
    • ANDO Akira
    • Department of Electrical Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
    • INUTAKE Masaaki
    • Department of Electrical Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan

Abstract

We have evaluated a Fermi antenna newly designed in X band for use in a multichannel reflectometer. The advantages of the Fermi antenna are that it can be adopted as an array antenna owing to its planer shape and fabricated with a low cost due to its compactness and a light-weighted structure. The radiation-beam widths in the E- and H-plane are almost equal to each other and the side-lobe levels are low. Plasma behaviors in the HITOP device are measured by reflectometry using two Fermi antenna receivers. Time evolution of the cutoff layer and plasma rotation velocity measured by the reflectometer are in good agreement with an electrostatic probe measurement.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research (2), S1039-S1039, 2007

    The Japan Society of Plasma Science and Nuclear Fusion Research

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