Title | Wall conditioning of JET with the ITER-Like Wall |
Publication Type | Journal Article |
Year of Publication | 2013 |
Authors | D. Douai, S. Brezinsek, H.G Esser, E. Joffrin, T. Keenan, S. Knipe, D. Kogut, P.J Lomas, S. Marsen, I. Nunes, V. Philipps, R.A. Pitts, M. Shimada, P. de Vries |
Journal | Journal of Nuclear Materials |
Volume | 438, Supplement |
Pagination | S1172 - S1176 |
Abstract | The initial conditioning cycle of \{JET\} İLW\} is analysed and compared with restart and operation in 2008 with a carbon dominated wall. Comparable water and oxygen decay times are observed during bake-out in both cases. Despite a 2 × 10−3 mbar l/s leak rate during plasma operation, no further wall conditioning has been necessary after plasma restart in ILW, which dramatically contrasts with 2008. Plasma O content is lower with the ILW. Higher O levels are measured after nights or week-ends, BeO layers being formed and re-eroded, but do not impact plasma operation and performance. First results on isotopic wall changeover by \{GDC\} on the İLW\} six months of the first \{D2\} campaign evidence a reservoir of about 3 × 1022 atoms, i.e. ten time lower than in carbon PFCs. A study in \{JET\} of the glow discharge current distribution for different ratios of the ionization mean free paths to the vessel dimensions seems to indicate sufficient toroidal and poloidal homogeneity in ITER. |
URL | http://www.sciencedirect.com/science/article/pii/S0022311513002675 |
DOI | 10.1016/j.jnucmat.2013.01.259 |
Division | FP |
Department | PDG |
PID | e871f2d57039e54ffebbe25c665aef98 |
Alternate Title | J. Nucl. Mater. |
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