Spatial localization of ECE measurement in EAST LHW-heated plasmas

HFCAS OpenIR

	Spatial localization of ECE measurement in EAST LHW-heated plasmas
其他题名	Spatial localization of ECE measurement in EAST LHW-heated plasmas
	2019
发表期刊	PLASMA SCIENCE & TECHNOLOGY
ISSN	1009-0630
摘要	In this work, electron cyclotron emission (ECE) is simulated by using the code SPECE to study the spatial localization of ECE measurement in EAST plasmas heated by lower hybrid wave (LHW). The results indicate that generally there are two emission layers for an individual frequency in plasmas with non-thermal electrons, and they are separately attributed to the thermal electrons and non-thermal electrons. The emission layer due to the thermal electrons is nearly identical to that for the case with Maxwellian distribution. The emission layer due to non-thermal electrons is well localized in the location of the non-thermal electrons. Even though the non-thermal emission layer is broader, the emission intensity is smaller than that from the thermal emission layer for the cases studied in this work. Localized electron temperature fluctuations can still be distinguished by ECE measurement as long as it does not coexist with the non-thermal electrons. Sawtooth inversion radii and tearing mode island location determined respectively by the ECE measurement and the soft x-ray measurement for a LHW-heated plasma show a good agreement, and this indicates that the ECE measurement in the plasma core region is not seriously polluted.
其他摘要	In this work, electron cyclotron emission (ECE) is simulated by using the code SPECE to study the spatial localization of ECE measurement in EAST plasmas heated by lower hybrid wave (LHW). The results indicate that generally there are two emission layers for an individual frequency in plasmas with non-thermal electrons, and they are separately attributed to the thermal electrons and non-thermal electrons. The emission layer due to the thermal electrons is nearly identical to that for the case with Maxwellian distribution. The emission layer due to non-thermal electrons is well localized in the location of the non-thermal electrons. Even though the non-thermal emission layer is broader, the emission intensity is smaller than that from the thermal emission layer for the cases studied in this work. Localized electron temperature fluctuations can still be distinguished by ECE measurement as long as it does not coexist with the non-thermal electrons. Sawtooth inversion radii and tearing mode island location determined respectively by the ECE measurement and the soft x-ray measurement for a LHW-heated plasma show a good agreement, and this indicates that the ECE measurement in the plasma core region is not seriously polluted.
关键词	SUPRATHERMAL ELECTRONS CURRENT DRIVE GENERATION EAST ECE LHW non-thermal electrons spatial localization
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology] ; [National Magnetic Confinement Fusion Science Program of China]
CSCD记录号	CSCD:6555179
引用统计
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/49960
专题	中国科学院合肥物质科学研究院
推荐引用方式 GB/T 7714	. Spatial localization of ECE measurement in EAST LHW-heated plasmas[J]. PLASMA SCIENCE & TECHNOLOGY,2019,21.
APA	(2019).Spatial localization of ECE measurement in EAST LHW-heated plasmas.PLASMA SCIENCE & TECHNOLOGY,21.
MLA	"Spatial localization of ECE measurement in EAST LHW-heated plasmas".PLASMA SCIENCE & TECHNOLOGY 21(2019).