ファラデー回転光ファイバー磁界測定器による JIPP T-IIU のポロイダル磁場測定

概要

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A magnetic field sensor of a near infrared Faraday rotator supplied by Mitsubishi Electric Corporation has been used for the measurement of the poloidal field on JIPP T-IIU. The poloidal field thus measured agrees within 2 percent in accuracy with the value calculated from the plasma current which is measured with two pairs of magnetic probe calibrated by a Rogowski coil. The measurement error of poloidal field was mainly caused by the out-put noise of the signal amplifier. The errors due to this noise were 12 and 8.4 percent in the obserbed ranges of 0.4 and 1.0k gauss, respectively. Other factors of the measurement error are also discussed in this paper. As a result, much information was obtained on the applicability of Faraday rotator in the poloidal field measurement on tokamaks.
核融合科学研究所の論文