Effect of boronization in VEST: Achieving 0.1 MA discharge

被引：4
|
作者：
Yang, J. [1 ]
Hong, S. H. [2 ]
Kim, D. [1 ]
Jang, J. [1 ]
Kim, J. Y. [1 ]
Jung, E. C. [1 ]
Kim, Y. [1 ]
Hwang, Y. S. [1 ]
机构：
[1] Seoul Natl Univ, Dept Engn, Seoul, South Korea
[2] Natl Fus Res Inst, Daejon, South Korea
来源：
FUSION ENGINEERING AND DESIGN | 2018年 / 137卷
基金：
新加坡国家研究基金会;
关键词：
Boronization; Carborane; Tokamak; Spectroscopy;
D O I：
10.1016/j.fusengdes.2018.10.021
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Boronization procedure for Versatile Experiment Spherical Torus (VEST) is developed in order to reduce the oxygen impurity during the Ohmic plasma discharge. Carborane (C2B10H12) powder has been chosen for a safe operation. During the helium glow discharge, the sublimated carborane is diffused into the vacuum vessel, which results in thin boron-containing coatings on the vacuum vessel wall. After the boronization, qualitative changes in visible light intensities of oxygen and boron lines are observed indicating that the water concentration is reduced globally. The quality of discharges is greatly improved: a discharge with less radiative loss is achieved, which leads to a record shot of 0.1 MA plasma current and a nearly doubled pulse length.
引用
收藏
页码：358 / 361
页数：4
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