Radiative divertor behavior and physics in Ar seeded plasma on EAST

To investigate the radiative divertor behavior and physics for the scenario of impurity seeded plasma in ITER, the radiative divertor experiments with argon（Ar） seeding under ITER-like tungsten divertor condition were carried out during recent EAST campaigns. The experimental results reveal the high...

Full description

Saved in:
Bibliographic Details
Published inChinese physics B Vol. 26; no. 9; pp. 318 - 323
Main Author 陈竞博 段艳敏 杨钟时 王亮 吴凯 李克栋 丁芳 毛红敏 许吉禅 高伟 张凌 吴金华 罗广南 EAST Team
Format Journal Article
LanguageEnglish
Published 01.08.2017
Subjects
ITER
播种后
物理
种子
等离子体
行为
辐射偏滤器
Online AccessGet full text

Cover

More Information
Summary:To investigate the radiative divertor behavior and physics for the scenario of impurity seeded plasma in ITER, the radiative divertor experiments with argon（Ar） seeding under ITER-like tungsten divertor condition were carried out during recent EAST campaigns. The experimental results reveal the high efficiency of reducing heat load and particle flux onto the divertor targets owing to increased radiation by Ar seeding. We achieve detached plasmas in these experiments. The inner–outer divertor asymmetry reduces after Ar seeding. Impurities, such as Ar, C, Li, and W, exist in the entire space of the vacuum chamber during EAST operations, and play important roles in power exhausting and accelerating the plasma detachment process. It is remarkable that the contamination of the core plasma is observed using Ar seeding owing to the sputtering of plasma facing components（PFCs）, particularly when Ar impurity is injected from the upper tungsten divertor.
Bibliography:argon seeding power exhaust ITER-like tungsten divertor EAST
11-5639/O4
To investigate the radiative divertor behavior and physics for the scenario of impurity seeded plasma in ITER, the radiative divertor experiments with argon（Ar） seeding under ITER-like tungsten divertor condition were carried out during recent EAST campaigns. The experimental results reveal the high efficiency of reducing heat load and particle flux onto the divertor targets owing to increased radiation by Ar seeding. We achieve detached plasmas in these experiments. The inner–outer divertor asymmetry reduces after Ar seeding. Impurities, such as Ar, C, Li, and W, exist in the entire space of the vacuum chamber during EAST operations, and play important roles in power exhausting and accelerating the plasma detachment process. It is remarkable that the contamination of the core plasma is observed using Ar seeding owing to the sputtering of plasma facing components（PFCs）, particularly when Ar impurity is injected from the upper tungsten divertor.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/9/095205