Large-Aperture Broadband Polarization Rotator for the KSTAR ECE Imaging System

被引：15
作者：
Lee, J. [1 ]
Yun, G. S. [1 ]
Kim, M. [1 ]
Lee, W. [1 ]
Park, H. K. [1 ]
机构：
[1] POSTECH, Pohang, Gyeongbuk, South Korea
来源：
JOURNAL OF INSTRUMENTATION | 2012年 / 7卷
关键词：
Radiation and optical windows; Plasma diagnostics - interferometry; spectroscopy and imaging;
D O I：
10.1088/1748-0221/7/01/C01037
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The electron cyclotron emission (ECE) imaging system installed in the KSTAR tokamak has been designed for 2D electron temperature measurement based on the X-mode 2nd harmonic ECE radiation at a magnetic field similar to 2 T. For operation at higher magnetic fields (similar to 3-3.5 T) in the future, the frequency of the X-mode 2nd harmonic ECE (> 170 GHz) exceeds the detectable range of the system. Instead of extending the detector frequency range, large-aperture half-wave plates for polarization rotation have been developed to utilize the O-mode fundamental ECE, which is within the detectable range (similar to 65-135 GHz) of the present system.
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页数：7
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