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

	Influence of impurity seeding on the plasma radiation in the EAST tokamak
刊名	PLASMA SCIENCE & TECHNOLOGY
	2018
卷号	20
关键词	JET DISCHARGES BOLOMETRY ARGON impurity seeding radiation profile AXUV photodiodes impurity sputtering
ISSN号	1009-0630
其他题名	Influence of impurity seeding on the plasma radiation in the EAST tokamak
英文摘要	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.
资助项目	[National Natural Science Foundation of China] ; [National Magnetic Confinement Fusion Science Program of China]
语种	英语
CSCD记录号	CSCD:6264523
内容类型	期刊论文
源URL	[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).