Ammonia formation and W coatings interaction with deuterium/nitrogen plasmas in the linear device GyM (Articolo in rivista)

Type
Label
  • Ammonia formation and W coatings interaction with deuterium/nitrogen plasmas in the linear device GyM (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jnucmat.2014.12.087 (literal)
Alternative label
  • L. Laguardia (a); R. Caniello (a); A. Cremona (a); D. Dellasega (a,b); F. Dell'Era (a); F. Ghezzi (a); G. Gittini (a); G. Granucci (a); V. Mellera (a); D. Minelli (a); F. Pallotta (a); M. Passoni (a,b); D. Ricci (a); E. Vassallo (a) (2014)
    Ammonia formation and W coatings interaction with deuterium/nitrogen plasmas in the linear device GyM
    in Journal of nuclear materials
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L. Laguardia (a); R. Caniello (a); A. Cremona (a); D. Dellasega (a,b); F. Dell'Era (a); F. Ghezzi (a); G. Gittini (a); G. Granucci (a); V. Mellera (a); D. Minelli (a); F. Pallotta (a); M. Passoni (a,b); D. Ricci (a); E. Vassallo (a) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Al momento dell'inserimento dell'articolo, lo stesso non era ancora indicizzato (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0022311514010307# (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a) CNR, Istituto di Fisica del Plasma''P. Caldirola'', Milan, Italy; b) Politecnico di Milano, Dipartimento di Energia, Milan, Italy (literal)
Titolo
  • Ammonia formation and W coatings interaction with deuterium/nitrogen plasmas in the linear device GyM (literal)
Abstract
  • In this work results of the first D2/N2 experiments in GyM, a linear device able to produce plasmas of interest for the ITER divertor (ne 5 ? 1010 cm-3, Te 5 eV, ion flux 3-5 ? 1020 m-2s-1) are presented. Plasmas simulating a N-seeding scenario have been performed to evaluate ammonia formation and its effect on exposed W coatings. The presence of ND emission lines in the plasma can be correlated with the formation of ammonia, further directly detected and quantified by chromatography analysis of the exhaust. Four different W specimens were exposed in GyM to a plasma fluence of 8.78 ? 1023 m-2. XPS analysis evidenced the formation of WxNy layers with nitrogen concentration in the range of 1-10% depending on the initial morphology and structure of the W samples. In all analyzed cases, nitrogen was bound and retained within the first 6 nm below the surface and no further diffusion of N into the bulk was observed. (literal)
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