Experimental study of plasma energy transfer and material erosion under ELM-like heat loads

被引：52

作者：

Garkusha, I. E. ^{[1
]}

Makhlaj, V. A. ^{[1
]}

Chebotarev, V. V. ^{[1
]}

Landman, I. ^{[2
]}

Tereshin, V. I. ^{[1
]}

Aksenov, N. N. ^{[1
]}

Bandura, A. N. ^{[1
]}

机构：

[1] Inst Plasma Phys NSC KIPT, UA-61108 Kharkov, Ukraine

[2] IHM, Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 390-91卷

关键词：

SIMULATION; DISRUPTION; TARGETS; STREAMS;

D O I：

10.1016/j.jnucmat.2009.01.215

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Main features of plasma-surface interaction and energy transfer to tokamak plasma facing components are studied at different heat loads in ELM simulation experiments with the plasma gun QSPA Kh-50. Repetitive plasma exposures of tungsten, graphite and different combined W-C targets were performed at the pulse duration of 0.25 ms and the heat loads varied in the range 0.2-2.5 MJ/m(2). The onset of vapor shield in front of the surface was investigated. The evaporation is immediately followed by a saturation of surface heat load if further increasing the impact energy. The presence of graphite essentially decreases the heat flux to the nearby tungsten Surface, which is due to the carbon vapor shield. Droplet splashing at the tungsten surface and formation of hot spots on the graphite surface are discussed. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：814 / 817

页数：4

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