Thermo-oxidation and analysis of JET codeposits

被引:8
|
作者
Haasz, A. A. [1 ]
Likonen, J. [2 ]
Coad, J. P. [3 ]
Tsui, C. K. [1 ]
Davis, J. W. [1 ]
Widdowson, A. M. [3 ]
机构
[1] Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada
[2] Assoc EURATOM TEKES, VTT Proc, Espoo 02044, Finland
[3] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
基金
英国工程与自然科学研究理事会;
关键词
C-D-LAYERS; DIVERTOR TILES; CARBON-FILMS; REMOVAL; OXIDATION;
D O I
10.1016/j.jnucmat.2009.01.303
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation Surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 degrees C) and 21 kPa (160 Tort) O-2 pressure - in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical the surfaces have a duplex structure with a C-D rich layer on the surface and a Be-C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to similar to 1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:626 / 630
页数:5
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