Efficacy of photon cleaning of JET divertor tiles

被引：26
|
作者：
Widdowson, A. [1 ]
Coad, J. P.
Bekris, N.
Counsell, G.
Forrest, M. J.
Gibson, K. J.
Hole, D.
Likonen, J.
Parsons, W.
Renvall, T.
Rubel, M.
机构：
[1] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[2] Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany
[3] Univ Manchester, Manchester, Lancs, England
[4] Univ Sussex, Dept Engn & Design, Brighton, E Sussex, England
[5] EURATOM, TEKES, VTT Proc, FIN-02044 Espoo, Finland
[6] Assoc EURATOM VR, Royal Inst Technol, S-10044 Stockholm, Sweden
来源：
JOURNAL OF NUCLEAR MATERIALS | 2007年 / 363卷 / 1-3期
基金：
欧盟地平线“2020”; 英国工程与自然科学研究理事会;
关键词：
desorption; tritium; deuterium inventory; surface analysis; divertor;
D O I：
10.1016/j.jnucmat.2007.01.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Photon cleaning by means of a flash-lamp was used for in-situ detritiation of the inner wall tiles of the JET divertor in May 2004. Additional trials were also performed ex-situ in October 2004 on divertor base tiles. Early work confirmed that for pulse energies between 150 J and 300 J some deposited material was removed. To increase the amount of material removed during photon cleaning, further experiments with higher pulse energies (500 J) were performed and are reported here. Analysis of cross sections confirmed a removal rate of 0.04 mu m/pulse, removing similar to 80 mu m from 200 mu m thick deposits over a treatment area of 15 x 10(-4) m(2). During the photon cleaning tests at least 12% of the tritium inventory for the tile was removed. It was also shown that deuterium was desorbed from a depth similar to 7 mu m beyond the depth of material removed. Crown Copyright (c) 2007 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：341 / 345
页数：5
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