Feasibility of applying the lower cut-off frequency for the density radial coverage extension in EAST reflectometry measurement

doi:10.1088/2058-6272/ac52e9

	Feasibility of applying the lower cut-off frequency for the density radial coverage extension in EAST reflectometry measurement
	HUANG,Jia 1,2; HAN,Xiang 1; YE,Kaixuan 1; ZHANG,Tao 1; WEN,Fei 1; WU,Mingfu 1,2; GENG,Kangning 1; LI,Gongshun 1; ZHONG,Fubin 1,2; LIU,Yukai 3,4
刊名	Plasma Science and Technology
	2022-05-01
卷号	24
关键词	X-mode reflectometry density profile EAST lower cut-off frequency
ISSN号	1009-0630
DOI	10.1088/2058-6272/ac52e9
通讯作者	HUANG,Jia()
英文摘要	Abstract The extraordinary mode (X-mode) lower cut-off frequency is proposed for use in the reflectometry diagnostic on ITER for the electron density profile measurement, which is a trade-off between extreme plasma parameters and the accessible probing frequency. In contemporary experiments, the lower cut-off frequency can be identified at the probing frequency below the electron cyclotron frequency (f ce) under certain plasma conditions. We provide here, for the first time, the experimental validation of the use of the lower cut-off frequency for the density profiles via the reflectometry measurement on EAST. The corresponding group delay of the lower cut-off frequency evolves continuously with the upper one, revealing a reasonable radial coverage extension of reflectometry measurement toward the plasma core. It is concluded that the lower cut-off frequency can be used as a supplement to the upper one in the density profile inversion process, which is of particular interest in the high magnetic field and/or density discharge to extend the radial coverage of reflectometry measurement.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:PST_24_5_050001
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129639]
专题	中国科学院合肥物质科学研究院
通讯作者	HUANG,Jia
作者单位	1.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China 2.University of Science and Technology of China, Hefei 230026, People's Republic of China 3.Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People's Republic of China 4.Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China
推荐引用方式 GB/T 7714	HUANG,Jia,HAN,Xiang,YE,Kaixuan,et al. Feasibility of applying the lower cut-off frequency for the density radial coverage extension in EAST reflectometry measurement[J]. Plasma Science and Technology,2022,24.
APA	HUANG,Jia.,HAN,Xiang.,YE,Kaixuan.,ZHANG,Tao.,WEN,Fei.,...&,.(2022).Feasibility of applying the lower cut-off frequency for the density radial coverage extension in EAST reflectometry measurement.Plasma Science and Technology,24.
MLA	HUANG,Jia,et al."Feasibility of applying the lower cut-off frequency for the density radial coverage extension in EAST reflectometry measurement".Plasma Science and Technology 24(2022).