Effect of ELMs on deuterium-loaded-tungsten plasma facing components

被引：9
作者：
Umstadter, K. R. [1 ]
Rudakov, D. L. [1 ]
Wampler, W. [2 ]
Watkins, J. G. [2 ]
Wong, C. P. C. [3 ]
机构：
[1] Univ Calif San Diego, La Jolla, CA 92093 USA
[2] Sandia Natl Labs, Albuquerque, NM 87185 USA
[3] Gen Atom Co, San Diego, CA 92186 USA
来源：
JOURNAL OF NUCLEAR MATERIALS | 2011年 / 415卷 / 01期
关键词：
RETENTION;
D O I：
10.1016/j.jnucmat.2010.11.104
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Prior heat pulse testing of plasma facing components (PFCs) has been completed in vacuum environments without the presence of background plasma. Edge localized modes (ELMs) will not be this kind of isolated event and one should know the effect of a plasma background during these transients. Heat-pulse experiments have been conducted in the PISCES-A device utilizing laser heating in a divertor-like plasma background. Initial results indicate that the erosion of PFCs is enhanced as compared to heat pulse or plasma only tests. To determine if the enhanced erosion effect is a phenomena only witnessed in the laboratory PISCES device, tungsten and graphite samples were exposed to plasmas in the lower divertor of the DIII-D tokamak using the Divertor Material Evaluation System (DiMES). Mass loss analysis indicates that materials that contain significant deuterium prior to experiencing a transient heating event will erode faster than those that have no or little retained deuterium. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：S83 / S86
页数：4
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