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A Simplified Method Based on Magnetic Measurement for Determination of Iron-Core Tokamak Plasma Current Center

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Abstract

For the safe and efficient discharge operation, it is essential to real-time determine the plasma current center and guide the parameters modification in the vertical field coil current feedback control system. In this paper, we analyze the limitation of the method of measuring the plasma displacement by using single-turn loops, which was used in the vertical field coil current feedback control system on iron-core tokamak HT-7. In addition, we introduce a new method to estimate the plasma current center using the external magnetic measurements on iron-core tokamak. This method has been validated by several HT-7 discharges. The simulation and discussion of measured values by this method is presented.

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Acknowledgments

This work was supported by the National Magnetic Confinement Fusion Research Program of China under Grant Nos 2012GB105000 and 2014GB103000. The authors gratefully acknowledge the contribution of the EAST&HT-7 staff.

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Authors and Affiliations

  1. Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei, 230031, Anhui, China

    Zhe Xing, Bingjia Xiao & Jinping Qian

  2. School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230027, Anhui, China

    Bingjia Xiao

Authors
  1. Zhe Xing
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  2. Bingjia Xiao
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  3. Jinping Qian
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Correspondence to Zhe Xing.

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Xing, Z., Xiao, B. & Qian, J. A Simplified Method Based on Magnetic Measurement for Determination of Iron-Core Tokamak Plasma Current Center. J Fusion Energ 34, 1297–1305 (2015). https://doi.org/10.1007/s10894-015-9959-7

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  • DOI: https://doi.org/10.1007/s10894-015-9959-7

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