EAST装置上W波段多道极向相关反射仪的研制

doi:10.16568/j.0254-6086.202003008

核聚变与等离子体物理 ›› 2020, Vol. 40 ›› Issue (3): 241-247.DOI: 10.16568/j.0254-6086.202003008

EAST装置上W波段多道极向相关反射仪的研制

吴茗甫1, 2，文斐*2，向皓明1, 2，张涛2，刘子奚1，王嵎民2，李恭顺3, 4，耿康宁1, 2，钟富彬1, 2，叶凯萱1, 2，黄佳1, 2，韩翔2，张寿彪2，高翔1, 2

(1. 中国科学技术大学核科学技术学院，合肥 230026； 2. 中国科学院等离子体物理研究所，合肥 230031； 3. 深圳大学新能源研究中心，深圳 518060； 4. 深圳大学光电工程学院，光电子器件与系统教育部/广东省重点实验室，深圳 518060)

收稿日期:2019-02-17 修回日期:2019-12-12 出版日期:2020-09-15 发布日期:2020-09-16
作者简介:吴茗甫(1994-)，男，江西省吉安市人，硕士研究生，主要从事等离子体芯部湍流研究。
基金资助:
国家重点研发计划(2017YFE0301205，2017YFE0300501)；国家自然科学基金(11875289，11675211，11505221，11805136)；中国科学院合肥物质科学研究院院长基金(YZJJ201611)

Development of a W-band multi-channel poloidal correlation reflectometry on EAST

(1. University of Science and Technology of China, Hefei 230026; 2. Institute of Plasma Physics, Chinese Academy of Science, Hefei 230031; 3. Advanced Energy Research Center, Shenzhen University, Shenzhen 518060; 4. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060)

Received:2019-02-17 Revised:2019-12-12 Online:2020-09-15 Published:2020-09-16

摘要/Abstract

摘要： 在EAST装置上安装了X模极化W波段多道相关反射仪，用于测量等离子体芯部密度涨落。该诊断利用低损耗(<3dB)多工器将4个不同频率(79.2GHz，85.2GHz，91.8GHz和96GHz)的微波耦合在一起，通过同一个天线发射。反射波由两个极向分离(~5cm)的天线接收，通过下变频技术实现外差测量。通过对两个极向天线接收的信号进行相关分析，获得芯部湍流垂直速度。对2018年低约束模式(L模)放电进行分析发现，在电子回旋共振加热(ECRH)等离子体中，芯部湍流垂直速度在电子逆磁漂移方向。而在注入同向中性束(co-NBI)后，芯部湍流垂直速度变为离子逆磁漂移方向。

关键词: 相关反射仪, 芯部湍流, 密度涨落, 湍流速度

Abstract: An X-mode polarized W-band multi-channel correlation reflectometry is installed on EAST tokamak for measuring the density fluctuations in the core of plasma. The diagnostic uses a low loss (<3dB) multiplexer to couple the microwaves of four different frequencies (79.2GHz, 85.2GHz, 91.8GHz and 96GHz) together and then transmit through the same antenna. The reflected wave is received by two antennas separated poloidally with about 5cm, and then heterodyne measurement is achieved by down-conversion technology. The turbulent vertical velocity in the core of plasma can be obtained by doing correlation analysis for the signals received by the two poloidal antennas. Analysis of the 2018 lower confinement mode (L-mode) discharge shows that in plasma heated by the electron cyclotron resonance heating (ECRH), the vertical velocity of the core turbulence is in the direction of the electron diamagnetic drift. The vertical velocity of the core turbulence becomes in the direction of the ion diamagnetic drift after injecting the co-neutral beam.

Key words: Correlation reflectometry, Core turbulence, Density fluctuation, Turbulence velocity

中图分类号:

TL65+2

吴茗甫1, 2，文斐*2，向皓明1, 2，张涛2，刘子奚1，王嵎民2，李恭顺3, 4，耿康宁1, 2，钟富彬1, 2，叶凯萱1, 2，黄佳1, 2，韩翔2，张寿彪2，高翔1, 2. EAST装置上W波段多道极向相关反射仪的研制[J]. 核聚变与等离子体物理, 2020, 40(3): 241-247.

WU Ming-fu1, 2, WEN Fei2, XIANG Hao-ming1, 2, ZHANG Tao2, LIU Zi-xi1, WANG Yu-ming2, LI Gong-shun3, 4, GENG Kang-ning1, 2, ZHONG Fu-bin1, 2, YE Kai-xuan1, 2, HUANG Jia1, 2, HAN Xiang2, ZHANG Shou-biao2 , GAO Xiang1, 2. Development of a W-band multi-channel poloidal correlation reflectometry on EAST [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2020, 40(3): 241-247.

参考文献

Mazzucato E. Microwave reflectometry for magnetically confined plasmas [J]. Rev. Sci. Instrum., 1998, 69(6): 2201-2217. Nazikian R, Kramer G J, Valeo E. A tutorial on the basic principles of microwave reflectometry applied to fluctuation measurements in fusion plasmas [J]. Physics of Plasmas, 2001, 8(5): 1840-1855. Rhodes T L, Taylor R J, Peebles W A. Correlation reflectometry: an experimental investigation of measurement capability [J]. Rev. Sci. Instrum., 1995, 66(1): 824-826. Mazzucato E, Nazikian R. Radial scale length of turbulent fluctuations in the main core of TFTR plasmas [J]. Phys. Rev. Lett., 1993, 71(12): 1840-1843. Hacquin S, Meneses L, Cupido L, et al. Upgrade of the X-mode reflectometry diagnostic for radial correlation measurements in the Joint European Torus [J]. Rev. Sci. Instrum., 2004, 75(10): 3834-3836. Shinohara K, Nazikian R, Fujita T, et al. Core correlation reflectometer at the JT-60U tokamak [J]. Rev. Sci. Instrum., 1999, 70(11): 4246-4250. Vershkov V A, Dreval V V, Soldatov S V. A three-wave heterodyne correlation reflectometer developed in the T-10 tokamak [J]. Rev. Sci. Instrum., 1999, 70(3): 1700-1709. Kr?mer-Flecken A, Soldatov S, Vowinkel B, et al. Correlation reflectometry at TEXTOR [J]. Rev. Sci. Instrum., 2010, 81(11): 113502-113502. Wang Y M, Gao X, Ling B L, et al. Development of the W-band density profile and fluctuation reflectometer on EAST [J]. Fusion Engineering and Design, 2013, 88(11): 2950-2955. Zhang S B, Gao X, Ling B L, et al. Density profile and fluctuation measurements by microwave reflectometry on EAST [J]. Plasma Science and Technology, 2014, 16(4): 311-315. Qu H, Zhang T, Han X, et al. Radial and poloidal correlation reflectometry on Experimental Advanced Superconducting Tokamak [J]. Rev. of Sci. Instrum., 2015, 126(8): 1899-4250. Qu H, Zhang T, Han X, et al. Multi-channel poloidal correlation reflectometry on experimental advanced superconducting tokamak [J]. Rev. Sci. Instrum., 2016, 87(11):11E707. Xiang H M, Zhang T, Wen F, et al. Development of an ordinary mode multi-channel correlation reflectometer on EAST tokamak [J]. Rev. Sci. Instrum., 2018, 89(10): 10H103. Gao X, Zhang X, Hu C, et al. Key issues for long-pulse high-βN operation with the Experimental Advanced Superconducting Tokamak (EAST) [J]. Nucl. Fusion, 2017, 57(5): 056021. Yang Y, Gao X, Liu H Q, et al. Observation of internal transport barrier in ELMy H-mode plasmas on the EAST tokamak [J]. Plasma Phys. Contr. Fusion, 2017, 59(8): 085003. Ida K, Fujita T. Internal transport barrier in tokamak and helical plasmas [J]. Plasma Phys. Contr. Fusion, 2018, 60(3): 033001. Prisiazhniuk D, Kr?mer-Flecken A, Conway G D, et al. Magnetic field pitch angle and perpendicular velocity measurements from multi-point time-delay estimation of poloidal correlation reflectometry [J]. Plasma Phys. Contr. Fusion, 2017, 59(2): 025013. Kr?mer-Flecken A, Rogister A, Dreval V, et al. Turbulence studies with means of reflectometry at TEXTOR [J]. Nucl. Fusion, 2004, 44(11): 1143-1157.

EAST装置上W波段多道极向相关反射仪的研制

Development of a W-band multi-channel poloidal correlation reflectometry on EAST

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