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Titolo:
Implantation driven permeation behavior of deuterium through pure tungsten
Autore:
Nakamura, H; Hayashi, T; Nishi, M; Arita, M; Okuno, K;
Indirizzi:
Japan Atom Energy Res Inst, Dept Fus Engn Res, Tritium Engn Lab, Tokai, Ibaraki 3191195, Japan Japan Atom Energy Res Inst Tokai Ibaraki Japan 3191195 aki 3191195, Japan
Titolo Testata:
FUSION ENGINEERING AND DESIGN
fascicolo: 4, volume: 55, anno: 2001,
pagine: 513 - 520
SICI:
0920-3796(200109)55:4<513:IDPBOD>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDROGEN TRANSPORT;
Keywords:
tritium; deuterium; permeation; ion implantation; fusion reactor; tungsten; TMAP;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Nakamura, H Japan Atom Energy Res Inst, Dept Fus Engn Res, Tritium Engn Lab, Tokai, Ibaraki 3191195, Japan Japan Atom Energy Res Inst Tokai Ibaraki Japan 3191195 Japan
Citazione:
H. Nakamura et al., "Implantation driven permeation behavior of deuterium through pure tungsten", FUSION ENG, 55(4), 2001, pp. 513-520

Abstract

Implantation driven permeation behavior of deuterium through pure tungstenhas been investigated to estimate the amount of tritium permeation throughits barrier in a thermo-nuclear fusion device. The permeation experiments were performed on pure tungsten foil of 25 mum thickness under conditions of incident flux of 1.9 x 10(18)-1.1 x 10(19) D+/m(2)s, incident ion energy of 200-2000 eV, and specimen temperature of 512-660 K. As a result of this steady-state permeation experiment, the rate-determining process of deuterium permeation was found to be controlled by diffusion at both implanted andpermeated sides. On the other hand, transient permeation was strongly affected by trap effect in the specimen. Simulation analysis using TMAP code ontransient permeation behavior indicates the existence of a trap site with a trap energy of nearly I eV and with a trap density of over several ten's ppm in tungsten. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 01/04/20 alle ore 02:02:37