Optics System Design of Microwave Imaging Reflectometry for the EAST Tokamak |
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Authors: | ZHU Yilun ZHAO Zhenling TONG Li CHEN Dongxu XIE Jinlin LIU Wandong |
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Affiliation: | Department of Modern Physics, University of Science and Technology of China, Hefei 230026,China |
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Abstract: | A front-end optics system has been developed for the EAST microwave imaging reflectometry for 2D density fluctuation measurement.Via the transmitter optics system,a combination of eight transmitter beams with independent frequencies is employed to illuminate wide poloidal regions on eight distinct cutoff layers.The receiver optics collect the reflected wavefront and project them onto the vertical detector array with 12 antennas.Utilizing optimized Field Curvature adjustment lenses in the receiver optics,the front-end optics system provides a flexible and perfect matching between the image plane and a specified cutoff layer in the plasma,which ensures the correct data interpretation of density fluctuation measurement. |
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Keywords: | density measurement multi-dimension microwave diagnostic optics lens |
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