Plasma position measurements by O-mode and X-mode reflectometry systems in tokamak plasmas

Shen Y. Q.; Yang Z. C.; Zhong W. L.Jiang M.Shi Z. B.Santos J.Shi P. W.Tong R. H.Xue G. Q.Zhou Y.Wen J.Yu X.Deng W. C.Wang S.Yang Z. J.Chen Z. Y.Li D.Zha X. Q.Jin Z. Y.Xu X.Xu M.

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Plasma position measurements by O-mode and X-mode reflectometry systems in tokamak plasmas

机译：Plasma position measurements by O-mode and X-mode reflectometry systems in tokamak plasmas

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Plasma Position Reflectometry (PPR) is planned to provide plasma position and shape information for plasma operation in future fusion reactors. Its primary function is to calibrate the drift of the magnetic signals due to the integral nature of magnetic measurement. Here, we attempt to measure plasma position using ordinary mode (O-mode) and extraordinary mode (X-mode) reflectometry systems on two tokamaks. A new physical model based on the phase shift is proposed to deduce the relative movement of the cut-off layer without density inversion. We demonstrate the plasma position measurements by absolute measurement from density profile inversion and relative measurement from phase shift. The combination of X-mode and O-mode reflectometers can minimize the limitations of single polarization reflectometry and further increase the accuracy of plasma position measurement. These results could provide an important technical basis for the further development of a real-time control system based on PPR.

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《Review of Scientific Instruments》 |2023年第6期|063505-1-063505-10|共10页
作者
Shen Y. Q.; Yang Z. C.; Zhong W. L.Jiang M.Shi Z. B.Santos J.Shi P. W.Tong R. H.Xue G. Q.Zhou Y.Wen J.Yu X.Deng W. C.Wang S.Yang Z. J.Chen Z. Y.Li D.Zha X. Q.Jin Z. Y.Xu X.Xu M.;
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Southwestern Institute of Physics;

Associação EURATOM/IST, Instituto de Plasmas e Fusão Nuclear—Laboratório Associado, Instituto Superior Técnico;

International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Tec;

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Plasma position measurements by O-mode and X-mode reflectometry systems in tokamak plasmas

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