[1]向皓明,屈浩,张涛,等.EAST装置多道极向相关反射仪诊断[J].深圳大学学报理工版,2016,33(6):606-612.[doi:10.3724/SP.J.1249.2016.06606]
　Xiang Haoming,Qu Hao,Zhang Tao,et al.The diagnose of multi-channel poloidal correlation reflectometry on EAST[J].Journal of Shenzhen University Science and Engineering,2016,33(6):606-612.[doi:10.3724/SP.J.1249.2016.06606]
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EAST装置多道极向相关反射仪诊断()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第33卷
期数:
2016年第6期
页码:
606-612
栏目:
物理与应用物理
出版日期:
2016-11-20

文章信息/Info

Title:
The diagnose of multi-channel poloidal correlation reflectometry on EAST
文章编号:
201606009
作者:
向皓明1; 2; 屈浩2; 3; 张涛2; 耿康宁2; 3; 文斐2; 韩翔2; 王嵎民2; 孔德峰2; 张寿彪2; 黄灿斌2; 3; 蔡剑青2; 高翔2; 林晓东1
1）深圳大学物理与能源学院，广东深圳 518060
2）中国科学院等离子体物理研究所，安徽合肥 230031
3）中国科学技术大学核科学技术学院，安徽合肥 230026
Author(s):
Xiang Haoming1; 2; Qu Hao2; 3; Zhang Tao2; Geng Kangning2; 3; Wen Fei2; Han Xiang2; Wang Yumin2; Kong Defeng2; Zhang Shoubiao2; Huang Canbin2; 3; Cai Jianqing2; Gao Xiang2; and Lin Xiaodong1
1) College of Physics and Energy, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China
2) Institute of Plasma Physics, Chinese Academy of Science, Hefei 230031, Anhui Province, P.R.China
3) School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, Anhui Province, P.R.China
关键词:
等离子体物理; 先进实验超导托卡马克装置; 相关反射仪; 密度涨落; 高约束模式; 台基湍流; 相干模
Keywords:
plasma physics;  experimental advanced superconducting Tokamak (EAST);  correlation reflectometry;  density fluctuation; high confinement mode;  turbulence in pedestal;  coherent mode
分类号:
O 533
DOI:
10.3724/SP.J.1249.2016.06606
文献标志码:
A
摘要:
在先进实验超导托卡马克（experimental advanced superconducting Tokamak，EAST)装置上研制多道极向相关反射仪诊断，使系统可同时测量8（径向）×2（极向）个位置的电子密度涨落．该系统选用8个固定输出频率（12.5、13.5、14.5、15.0、15.5、16.0、17.0和18.0 GHz）的介质振荡器作为信号源，源输出的信号通过4倍频器倍频至V波段，通过多个3 dB定向耦合器耦合成一路，入射波通过一个20 dB定向耦合器分为2路，其中，主路微波通过一个角锥天线入射进入等离子体，副路微波作为参考信号．接收天线阵列由2个极向间隔为6 cm的角锥天线组成．参考信号和反射信号与频率为14.2 GHz的介质振荡器4倍频之后的输出信号进行混频，混频后的中频信号分别通过放大器、带通滤波器组件和同相正交解调器进行解调．通过该诊断系统，初步观察到了由低约束模式向高约束模式转换的现象，且在ELM-free阶段，台基梯度区域，出现了持续时间在毫秒量级、频率在40~50 kHz的相干模．
Abstract:
The diagnosis of multi-channel poloidal correlation reflectometry has been designed on experimental advanced superconducting Tokamak (EAST). The setup enables the measurement of electron density fluctuations at 8 (radial) × 2 (poloidal) spatial points simultaneously. Eight dielectric resonator oscillators (DRO) with frequencies of 12.5, 13.5, 14.5, 15.0, 15.5, 16.0, 17.0, and 18.0 GHz are used as sources. Signals from the sources are up-converted to V band using active quadrupler and then coupled together with 3 dB coupler. The output waves are launched by one single antenna after passing through a 20 dB directional coupler which can provide the reference signal. Two poloidally separated antennae with the distance of 6 cm are installed to receive the reflected waves from plasma. The reference and reflected signals are down-converted by mixing with a quadrupled signal from a phase-locked source with frequency of 14.2 GHz and the resulted intermediate fcequencies passed through an amplifier, filter bank and are detected by in-phase/quadrature (I/Q) demodulators. The system is used to measure the density fluctuation of plasma. The transitions from the lower confinement modes to high confinement modes are observed. The coherent modes with duration times about few milliseconds and the frequency among 40—50 kHz at the position of pedestal gradient in the ELM-free phase are also obtained.

参考文献/References:

［1］ Mase A, Kogi Y, Hojo H, et al. Progress in microwave diagnostics and physics issues in magnetically confined plasmas［J］. Fusion Science and Technology, 2007, 51(2T): 52-57.
［2］ Antar G Y, Devynck P, Garbet X, et al. Turbulence intermittency and burst properties in Tokamak scrape-off layer［J］. Physics of Plasmas, 2001, 8(5): 1612-1624.
［3］ Ding B J, Kuang G L, Shan J F, et al. Edge turbulent transport with lower hybrid current drive in the Hefei Tokamak-7［J］. Physics of Plasmas, 2004, 11(1): 207-213.
［4］ Rudakov D L, Boedo J A, Moyer R A, et al. Fluctuation-driven transport in the DIII-D boundary［J］. Plasma Physics and Controlled Fusion, 2002, 44(6): 717-731.
［5］ Coenen J W, Schmitz O, Unterberg B, et al. Rotation and radial electric field in the plasma edge with resonant magnetic perturbation at TEXTOR［J］. Nuclear Fusion, 2011, 51(6): 063030.
［6］ Groebner R J, Burrell K H, Seraydarian R P. Role of EDGE electric-field and poloidal rotation in the L-H transition［J］. Physical Review Letters, 1990, 64(25): 3015-3018.
［7］ Mazzucato E. Microwave reflectometry for magnetically confined plasmas［J］. Review of Scientific Instruments, 1998, 69(6): 4014-4014.
［8］ Nazikian R, Kramer G J, Valeo E. A tutorial on the basic principles of microwave reflectometry［J］. Physics of Plasmas, 2001, 8(5): 1840-1855.
［9］ Mase A, Kogi Y, Ito N, et al. Advancements of microwave diagnostics in magnetically confined plasmas［J］. Plasma Devices and Operations, 2009, 17(2): 98-116.
［10］ Bruskin L G, Mase A, Oyama N, et al. Fluctuation reflectometry of azimuthally symmetric plasmas［J］. Plasma Physics and Controlled Fusion, 2002, 44(11): 2305-2325.
［11］ Rhodes T L, Taylor R J, Peebles W A. Correlation reflectometry: an experimental investigation of measurement capability［J］. Review of Scientific Instruments, 1995, 66(1): 824-826.
［12］ Mazzucato E, Nazikian R. Radial scale length of turbulent fluctuations in the main core of TFTR plasmas［J］. Physical Review Letters, 1993, 71(12): 1840-1843.
［13］ Shinohara K, Nazikian R, Fujita T, et al. Core correlation reflectometer at the JT-60U Tokamak［J］. Review of Scientific Instruments, 1999, 70(11): 4246-4250.
［14］ Vershkov V A, Dreval V V, Soldatov S V. A three-wave heterodyne correlation reflectometer developed in the T-10 Tokamak［J］. Review of Scientific Instruments, 1999, 70(3): 1700-1709.
［15］ Krmer-Flecken A, Soldatov S, Vowinkel B, et al. Correlation reflectometry at TEXTOR［J］. Review of Scientific Instruments, 2010, 81(11): 113502.
［16］ Krmer-Flecken A, Soldatov S, Xu Y, et al. Correlation reflectometry in fusion plasmas: an application at TEXTOR［J］. Plasma Physics and Controlled Fusion, 2011, 53(7): 0740210.
［17］ Gao Xiang, Zhang Tao, Han Xiang, et al. Observation of pedestal plasma turbulence on EAST Tokamak［J］. Plasma Science and Technology, 2013, 15(8): 732-737.
［18］ Qu Hao, Zhang Tao, Han Xiang, et al. Radial and poloidal correlation reflectometry on experimental advanced superconducting Tokamak［J］. Review of Scientific Instruments, 2015, 86(8): 3015-4250.
［19］ Chen C H K, Salem C S, Bonnell J W, et al. Density fluctuation spectrum of solar wind turbulence between Ion and electron scales［J］. Physical Review Letters, 2012, 109(3): 035001.
［20］ Han Xiang, Zhang Tao, Zhang Shoubiao B, et al. Observation of pedestal turbulence in edge localized mode-free H-mode on experimental advanced superconducting Tokamak［J］. Physics of Plasmas, 2014, 21(10): 102504.
［21］ Gao Xiang, Zhang Tao, Han Xiang, et al. Experimental study of pedestal turbulence on EAST Tokamak［J］. Nuclear Fusion, 2015, 55(8): 083015.
［22］ Hanson G R, Wilgen J B, Bigelow T S, et al. Microwave reflectometry for edge density profile measurements on TFTR［J］. Plasma Physics and Controlled Fusion, 1994, 36(12): 2073-2082.
［23］ Simonet F. Measurement of electron-density profile by microwave reflectometry on Tokmaks［J］. Review of Scientific Instruments, 1985, 56(5): 664-669.

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备注/Memo

备注/Memo:
Received：2016-07-15；Accepted：2016-07-26
Foundation：National Magnetic Confinement Fusion Science Program of China (2014GB106003); National Natural Science Foundation of China (11275234, 11305215, 11305208)
Corresponding author：Professor Lin Xiaodong. E-mail: linxd@szu.edu.cn
Citation：Xiang Haoming, Qu Hao, Zhang Tao, et al. The diagnose of multi-channel poloidal correlation reflectometry on EAST［J］. Journal of Shenzhen University Science and Engineering, 2016, 33(6): 606-612.（in Chinese）
基金项目：国家磁约束聚变能发展专项基金资助项目（2014GB106003）；国家自然科学基金资助项目（11275234，11305215，11305208）
作者简介：向皓明（1989—），男，深圳大学硕士研究生．研究方向：等离子体诊断．E-mail：xianghm@ipp.ac.cn
引文：向皓明，屈浩，张涛，等．EAST装置多道极向相关反射仪诊断［J］. 深圳大学学报理工版，2016，33(6)：606-612.
更新日期/Last Update: 2016-10-31