首页|Observation of Doppler shift fD modulated by the internal kink mode using conven-tional reflectometry in the EAST tokamak

Observation of Doppler shift fD modulated by the internal kink mode using conven-tional reflectometry in the EAST tokamak

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In this paper we present a new experimental observation using a conventional reflectometry technique,poloidal correlation reflectometry(PCR),in the Experimental Advanced Superconducting Tokamak(EAST).The turbulence spectrum detected by the PCR system exhibits an asymmetry and induced Doppler shift fD during the internal kink mode(IKM)rotation phase.This Doppler shift fD is the target measurement of Doppler reflectometry,but captured by conventional reflectometry.Results show that the Doppler shift fD is modulated by the periodic changes in the effective angle between the probing wave and cutoff layer normal,but not by plasma turbulence.The fishbone mode and saturated long-lived mode are typical IKMs,and this modulation phenomenon is observed in both cases.Moreover,the value of the Doppler shift fD is positively correlated with the amplitude of the IKM,even when the latter is small.However,the positive and negative frequency components of the Doppler shift fD can be asymmetric,which is related to the plasma configuration.A simulated analysis is performed by ray tracing to verify these observations.These results establish a clear link between fD and IKM rotation,and are helpful for studying the characteristics of IKM and related physical phenomena.

micro wave reflectometryDoppler shiftinternal kink mode

李恭顺、张涛、耿康宁、文斐、叶凯萱、徐立清、朱翔、张学习、钟富彬、周振、杨书琪、周子强、喻琳、兰婷、王守信、提昂、张寿彪、刘海庆、李国强、高翔、the EAST Team

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Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China

Advanced Energy Research Center,Shenzhen University,Shenzhen 518060,People's Republic of China

University of Science and Technology of China,Hefei 230026,People's Republic of China

国家重点研发计划国家重点研发计划国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Youth Science and Technology Talents Support Program(2020)by Anhui Association for Science and TechnologyScience Foundation of Institute of Plasma Physics,Chinese Academy of Sciences中国博士后科学基金Director Funding of Hefei Institutes of Physical Science,Chinese Academy of Sciences

2022YFE030500032022YFE030200042019YFE030802002022YFE0307000412275315118752891217527711975271RCTJ202009DSJJ-2021-082021M703256YZJJ2022QN16

2024

10.1088/2058-6272/ad0b78

等离子体科学和技术(英文版)
中国科学院合肥物质科学研究所 中国力学学会

等离子体科学和技术(英文版)

EI
影响因子：0.297
ISSN：1009-0630
年,卷(期)：2024.26(3)
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