Development of ECE/ECEI diagnostics and MHD-related studies on HL-2A tokamak

被引：4
|
作者：
Yang, Z. C. [1 ]
Jiang, M. [1 ]
Shi, Z. B. [1 ]
Ding, X. T. [1 ]
Luhmann, N. C., Jr. [2 ]
Zhong, W. L. [1 ]
Chen, W. [1 ]
Shi, P. W. [1 ]
Xu, Y. [3 ]
Wen, J. [1 ]
Liang, A. S. [1 ]
Liu, Y. [1 ]
Yang, Q. W. [1 ]
机构：
[1] Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China
[2] Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA
[3] Southwest Jiaotong Univ Chengdu, Sch Phys Sci & Technol, Inst Fus Sci, Chengdu 610031, Peoples R China
来源：
20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20) | 2019年 / 203卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
D O I：
10.1051/epjconf/201920303014
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A novel 60-channel electron cyclotron emission (ECE) radiometer has been designed and tested for the measurement of electron temperature profiles on the HL-2A tokamak. This system is based on the intermediate frequency division technique, and has the features of wide working frequency range (60-90 GHz) and high temporal-spatial resolution (3 mu s, 1 cm), which covers almost the entire plasma region. Also, an electron cyclotron emission imaging (ECEI) system has been developed for studying two dimensional electron temperature fluctuations. It is comprised of several front-end quasi-optical lenses, a 24 channel heterodyne imaging array with a tunable RF frequency range spanning 60-135 GHz, and a set of back-end ECEI electronics that together generate two 24x8 array images of the 2nd harmonic X-mode electron cyclotron emission from the HL-2A plasma. The measurement region can be flexibly shifted due to two independent local oscillator sources, and the field of view can be adjusted easily by changing the position of the zoom lenses as well. The temporal resolution is about 2.5 mu s and the achievable spatial resolution is 1 cm. The ECE /ECEI diagnostics have been demonstrated to be powerful tools to study MHD-related physics including the multi-scale interaction between macro-scale MHD and micro-scale turbulence on the HL-2A tokamak.
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页数：6
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