Development of ECE Imaging System on LHD

DOI Web Site 2 Citations 6 References
  • KOGI Yuichiro
    Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
  • SAKODA Takuya
    Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
  • MASE Atsushi
    Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
  • ITO Naoki
    Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
  • YAMAGUCHI Soichiro
    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
  • NAGAYAMA Yoshio
    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
  • KAWAHATA Kazuo
    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan

Abstract

Electron cyclotron emission (ECE) imaging has been an important tool to investigate behaviors of temperature perturbations in the specific spatial area. So far, we have applied ECE detection system to a LHD plasma to measure electron temperature fluctuations in core region, however, it was difficult to distinguish perturbed temperature signals to a noise, which is naturally consisted in radiometry features and so on. Recently, we have optimized an ECE detector array especially in sensitivity to increase signal to noise ratio. An intermediate frequency(IF) system composed of commercial components have been replaced by an integrated system utilizing millimeter(microwave) integrated circuit technology(MIC) to fabricate a compact system maintaining the performance of the commercial system. As a result of application to the LHD plasma, we have successfully obtained ECE signal even in comparably low temperature operation sequence.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 2 S1032-S1032, 2007

    The Japan Society of Plasma Science and Nuclear Fusion Research

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