Wall-conditioning plasmas by ECRF heating in KSTAR

被引：16
|
作者：
Itami, Kiyoshi [1 ]
Hong, Suk-Ho [2 ]
Bae, Young-Soon [2 ]
Matsukawa, Makoto [1 ]
Kim, Woong-Chae [2 ]
机构：
[1] Japan Atom Energy Agcy, Naka, Ibaraki 3110193, Japan
[2] Natl Fus Res Inst, Taejon 305333, South Korea
来源：
JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷
关键词：
SUPERCONDUCTING TOKAMAK;
D O I：
10.1016/j.jnucmat.2013.01.202
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Wall-conditioning plasmas by ECRF heating (ECWC plasmas) were investigated in KSTAR's experimental campaigns of 2010 and 2011. Pulses of 110 GHz ECH with an RF power of 200-300 kW were injected into the vacuum vessel, which was filled with helium at a gas pressure similar to 1 x 10 (3) mbar. In 2010, the second harmonic of ECH was applied and it was found that the ECRF wave normal to the toroidal field was essentially important for producing high-density plasmas and the uniformity of the plasma was significantly changed with an additional poloidal field pattern by B-H and B-V. In 2011, the fundamental ECH was applied with additional B-H = 0.02 T. The ECWC plasma extended radially toward both the high toroidal field side and low field side. The post-disruption first wall was successfully recovered by 20 pulses of the ECWC plasmas, equivalent to ECWC for 7 min. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：S930 / S935
页数：6
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