A New Method for Measuring Phase Shift in Heterodyne Interferometric Measurement

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概要

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• A new method for analysing the phase shift of heterodyne interferometric beat is developed. The phase shift is obtained directly from the change in the probe beat period without comparing with reference beat. According to this method an electric circuit system has been designed, combined with an HCN laser or microwave interferometer for the measurement of line-integrated electron density of plasma in Compact Helical System (CHS). The experimental results show that this method is effective. The minimum measurable phase shift is determined by the ratio of beat frequency to the counting clock frequency, and the maximum measurable phase shift is infinite in principle.

• 核融合科学研究所の論文

著者

• Fujita J.

  Institute of Plasma Physics, Nagoya University

• Nishizawa A.

  Institute of Plasma Physics, Nagoya University

• Bi D.g.

  Research Information Center Institute Of Plasma Physics Nagoya University:southwestern Institute Of

• Kubo S.

  Institute of Plasma Physics, Nagoya University

• Takahashi C.

  Institute of Plasma Physics, Nagoya University

• Bi D.G.

  Southwestern Institute of Physics

• Fujita J.

  Institute for Nuclear Study, University of Tokyo

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