Influence of impurity seeding on the plasma radiation in the EAST tokamak

HFCAS OpenIR

	Influence of impurity seeding on the plasma radiation in the EAST tokamak
其他题名	Influence of impurity seeding on the plasma radiation in the EAST tokamak
	2018
发表期刊	PLASMA SCIENCE & TECHNOLOGY
ISSN	1009-0630
摘要	Plasma radiation characteristics in EAST argon (Ar) gas and neon (Ne) gas seeding experiments are studied. The radiation profiles reconstructed from the fast bolometer measurement data by tomography method are compared with the ones got from the simulation program based on corona model. And the simulation results coincide roughly with the experimental data. For Ar seeding discharges, the substantial enhanced radiations can be generally observed in the edge areas at normalized radius rho(pol)similar to 0.7-0.9, while the enhanced regions are more outer for Ne seeding discharges. The influence of seeded Ar gas on the core radiation is related to the injected position. In discharges with LSN divertor configuration, the Ar ions can permeate into the core region more easily when being injected from the opposite upper divertor ports. In USN divertor configuration, the W impurity sputtered from the upper divertor target plates are observed to be an important contributor to the increase of the core radiation no matter impurity seeding from any ports. The maximum radiated power fractions f(rad) (P-rad/P-heat) about 60%-70% have been achieved in the recent EAST experimental campaign in 2015-2016.
其他摘要	Plasma radiation characteristics in EAST argon (Ar) gas and neon (Ne) gas seeding experiments are studied. The radiation profiles reconstructed from the fast bolometer measurement data by tomography method are compared with the ones got from the simulation program based on corona model. And the simulation results coincide roughly with the experimental data. For Ar seeding discharges, the substantial enhanced radiations can be generally observed in the edge areas at normalized radius ρ_(pol)～0.7-0.9, while the enhanced regions are more outer for Ne seeding discharges. The influence of seeded Ar gas on the core radiation is related to the injected position. In discharges with LSN divertor configuration, the Ar ions can permeate into the core region more easily when being injected from the opposite upper divertor ports. In USN divertor configuration, the W impurity sputtered from the upper divertor target plates are observed to be an important contributor to the increase of the core radiation no matter impurity seeding from any ports. The maximum radiated power fractions f_(rad) (P_(rad)/P_(heat)) about 60%-70 %have been achieved in the recent EAST experimental campaign in 2015-2016.
关键词	JET DISCHARGES BOLOMETRY ARGON impurity seeding radiation profile AXUV photodiodes impurity sputtering
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [National Magnetic Confinement Fusion Science Program of China]
CSCD记录号	CSCD:6264523
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/60333
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	. Influence of impurity seeding on the plasma radiation in the EAST tokamak[J]. PLASMA SCIENCE & TECHNOLOGY,2018,20.
APA	(2018).Influence of impurity seeding on the plasma radiation in the EAST tokamak.PLASMA SCIENCE & TECHNOLOGY,20.
MLA	"Influence of impurity seeding on the plasma radiation in the EAST tokamak".PLASMA SCIENCE & TECHNOLOGY 20(2018).