Broadband Multichannel Radiometer for ECE Measurements on KSTAR

Kazuo KAWAHATA; Yoshio NAGAYAMA; Hayato TSUCHIYA; Atsushi MASE; Yuichiro KOGI; Seung Ho JEONG; Kyu-Dong LEE; Richard J. WYLDE

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Broadband Multichannel Radiometer for ECE Measurements on KSTAR

机译：用于KSTAR的ECE测量的宽带多通道辐射计

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A broadband heterodyne radiometer system has been developed and installed on KSTAR to measure second harmonic electron cyclotron emission (ECE) at the magnetic field of 3 T. The system consisting of two radiometers (110-162 GHz and 164-196 GHz) can cover a frequency range of 110-196 GHz. The unique and key components to construct this ECE diagnostic instrument are specially-designed detector modules and a diplexer for splitting ECE radiation with high efficiency. The minimum detectable electron temperature with a time response of 1 μs is about 0.23 eV. The observed signal intensity is roughly consistent with the value estimated by using characteristics of various components (waveguide components, sub-harmonic mixers, amplifiers, and intermediate frequency detectors). In this article, design considerations and preliminary ECE measurements will be described.

机译：已经开发了宽带外差辐射计系统，并将其安装在KSTAR上，以在3 T的磁场下测量二次谐波电子回旋辐射（ECE）。该系统由两个辐射计（110-162 GHz和164-196 GHz）组成，可以覆盖一个频率范围为110-196 GHz。构造此ECE诊断仪器的独特且关键组件是专门设计的检测器模块和双工器，用于高效分离ECE辐射。具有1μs时间响应的最小可检测电子温度约为0.23 eV。观察到的信号强度大致与通过使用各种组件（波导组件，次谐波混频器，放大器和中频检测器）的特性估计的值一致。在本文中，将介绍设计注意事项和初步的ECE测量。

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《Plasma and Fusion Research》 |2011年第10期|共1页
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Kazuo KAWAHATA; Yoshio NAGAYAMA; Hayato TSUCHIYA; Atsushi MASE; Yuichiro KOGI; Seung Ho JEONG; Kyu-Dong LEE; Richard J. WYLDE;
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Broadband Multichannel Radiometer for ECE Measurements on KSTAR

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