Cao Qifo, Liu Yong, Zhao Hailin, Zhou Tianfu, Ti Ang, Hu Liqun
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China.
Rev Sci Instrum. 2016 Nov;87(11):11E116. doi: 10.1063/1.4960813.
A system to simultaneously diagnose the electron temperature and density fluctuations is proposed for Experimental Advanced Superconducting Tokamak device. This system includes a common quasi-optical antenna, a correlation electron cyclotron emission (CECE) system that is used to measure the electron temperature fluctuations and a Doppler backscattering (DBS) system that is used to measure the electron density fluctuations. The frequency range of the proposed CECE system is 108-120 GHz, and this corresponds to a radial coverage of normalized radius ((R - R)/a, R = 1850 mm, a = 450 mm) from 0.2 to 0.67 for the plasma operation with a toroidal magnetic field of 2.26 T. This paper focuses on the design of the quasi-optical antenna and aims at optimizing the poloidal resolution for different frequency bands. An optimum result gives the beam radius for the CECE system of 13-15 mm and this corresponds to a wave number range of k < 2.4 cm. The beam radius is 20-30 mm for V band (50-75 GHz) and 15-20 mm for W band (75-110 GHz).
为实验先进超导托卡马克装置提出了一种同时诊断电子温度和密度涨落的系统。该系统包括一个共用的准光学天线、一个用于测量电子温度涨落的相关电子回旋辐射（CECE）系统以及一个用于测量电子密度涨落的多普勒背散射（DBS）系统。所提出的CECE系统的频率范围为108 - 120GHz，对于具有2.26T环形磁场的等离子体运行，这对应于归一化半径（(R - R)/a，R = 1850mm，a = 450mm）从0.2到0.67的径向覆盖范围。本文重点关注准光学天线的设计，旨在针对不同频段优化极向分辨率。一个最佳结果给出CECE系统的束半径为13 - 15mm，这对应于波数范围k < 2.4cm。对于V波段（50 - 75GHz）束半径为20 - 30mm，对于W波段（75 - 110GHz）束半径为15 - 20mm。
