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

被引：0

作者：

董丽平 ^{[1
,2
]}

段艳敏 ^{[1
]}

陈开云 ^{[1
]}

杨秀达 ^{[1
]}

张凌 ^{[1
]}

徐峰 ^{[1
,2
]}

陈竞博 ^{[1
,2
]}

毛松涛 ^{[1
,2
]}

吴振伟 ^{[1
]}

胡立群 ^{[1
]}

机构：

[1] Institute of Plasma Physics,Chinese Academy of Sciences

[2] University of Science and Technology of China

来源：

Plasma Science and Technology | 2018年 / 06期

基金：

中国国家自然科学基金;

关键词：

impurity seeding; radiation profile; AXUV photodiodes; impurity sputtering;

D O I：

暂无

中图分类号：

TL631.24 [];

学科分类号：

082701 ;

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;.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;(P;/P;) about 60%–70% have been achieved in the recent EAST experimental campaign in 2015–2016.

引用

页码：27 / 33

页数：7