[Table of Contents]

Plasma and Fusion Research

Volume 2, S1032 (2007)

Regular Articles

Development of ECE Imaging System on LHD
Yuichiro KOGI, Takuya SAKODA, Atsushi MASE, Naoki ITO, Soichiro YAMAGUCHI1), Yoshio NAGAYAMA1) and Kazuo KAWAHATA1)
Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
1)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
(Received 4 December 2006 / Accepted 2 July 2007 / Published 20 November 2007)

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 An intermediate frequency(IF) system composed of commercial components have been replaced by an integrated system utilizing millimeter(microwave) integrated circuit technology(MIC) to fabricate a compact system maintaining the performance of the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.

Keywords

electron cyclotron emission, imaging system, electron temperature measurement, millimeter wave, microwave, microwave integrated circuit technology

DOI: 10.1585/pfr.2.S1032

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References

  • [1] R.P. Hsia et al., Rev. Sci. Instrum. 68, 488(1997).
  • [2] B.H. Deng et al., Rev. Sci. Instrum. 70, 998 (1999).
  • [3] B.H. Deng et al., Rev. Sci. Instrum. 72, 301 (2001).
  • [4] H. Park et al., Rev. Sci. Instrum. 75, 3787 (2004).
  • [5] C.W. Domier et al., Rev. Sci. Instrum. 77, 10E924 (2006).
  • [6] A. Mase et al., Rev. Sci. Instrum. 74, 1445 (2003).
  • [7] S. Haider et al., Microstrip Patch Antennas for Broadband Indoor Wireless Systems (Depart of Electrical & Electronics Engineering, Part4 Project Report) 2003.
  • [8] G. Matthaei et al., MICROWAVE FILTERS, IMPEDANCEMATCHING NETWORKS, AND COUPLING STRUCTURES (Artech House) p.422.

This paper may be cited as follows:

Yuichiro KOGI, Takuya SAKODA, Atsushi MASE, Naoki ITO, Soichiro YAMAGUCHI, Yoshio NAGAYAMA and Kazuo KAWAHATA, Plasma Fusion Res. 2, S1032 (2007).