Thermal response to heat fluxes of the W7-AS divertor surface submitted to surface modification under high temperature treatment

被引：5

作者：

Hildebrandt, D. ^{[1
]}

Duebner, A. ^{[1
]}

Greuner, H. ^{[2
]}

Wiltner, A. ^{[2
]}

机构：

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, Teilinst Greifswald, D-17491 Greifswald, Germany

[2] Teilinst Garching, D-85748 Garching, Germany

来源：

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

关键词：

D O I：

10.1016/j.jnucmat.2009.01.288

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Some target tiles of the W7-AS divertor has been investigated with respect to their thermal behaviour at the surface during power loading with well-defined heat fluxes in the Gladis facility. The primary aim was to examine uncertainties in the determination of heat fluxes derived from IR-thermography during operation of W7-AS. It is found that the derived heat flux profiles are strongly influenced by the local distribution of plasma-deposited contamination analyzed by AES and SIMS. With the observed actual surface conditions characterized by redeposited contamination equivalent up to about I pin thickness, the heat fluxes were partially overestimated up to a factor of 4 during operation of W7-AS. This uncertainty is observed to be significantly reduced after heat treatment at temperatures beyond 700 degrees C attained at power flux densities of 10.5 MW/m(2) and durations longer than 5 s. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1118 / 1122

页数：5

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