|作者：||C. Luo, B.J. Tobias, B. Gao, Y. Zhu, J. Xie, C.W. Domier, N.C. Luhmann, T. Lan, A. Liu, H. Li, C. Yu, W. Liu|
1Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
2Princeton Plasma Physics Laboratory, Princeton, NJ 08540, U.S.A.
3Universtiy of California at Davis, Davis, CA 95616, U.S.A.
|刊名：||Journal of Instrumentation, 2014, Vol.9 (12)|
|来源数据库：||Institute of Physics Journal|
|原始语种摘要：||A novel large aperture quasi-optical imaging system is designed for the new dual-array electron cyclotron emission (ECE) imaging (ECEI) instrument on the EAST tokamak. The zoom doublet scheme is used in the microwave imaging system on a super-conducting tokamak for the first time, and the focal plane can reach the high magnetic field side region even in the narrowest zoom configuration. The best spatial resolution in the vertical direction is 1.1 cm and the maximum vertical coverage can reach 80 cm. The field curvature is largely reduced in the narrow zoom configuration by the parabolic correction of a single lens surface. The imaging performance is fully characterized in the laboratory, and the characterized beam patterns show good agreements with the Gaussian beam specifications in the... simulation results of the design.|