%0 Journal Article
%A Loarer, T.
%A Brezinsek, S.
%A Philipps, V.
%A Romanelli-Gruenhagen, S.
%A Alves, D.
%A Carvalho, I.
%A Douai, D.
%A Esser, H. G.
%A Felton, R.
%A Frigione, D.
%A Kruezi, U.
%A Reux, C.
%A Smith, R.
%A Stamp, M. F.
%A Vartanian, S.
%T Plasma isotopic change over experiments in JET under Carbon and ITER-Like Wall conditions
%J Journal of nuclear materials
%V 463
%@ 0022-3115
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2015-04487
%P 1117 - 1121
%D 2015
%X Starting with a wall loaded by H2, change over experiments from H2 to D2 have been carried out in JET-ILW. A series of 13 repetitive pulses (cumulating 215 s in divertor configuration) have been performed under conditions of: Ip = 2.0 MA, BT = 2.4 T, 〈ne〉 = 4.5 × 1019 m−3 with a constant gas injection of 3.0 × 1021 D s−1 and 0.5 MW of auxiliary heating by ICRH in L-mode. Gas balance analysis shows that the total amount of H removed from the wall is in the range of 3 × 1022 D compared to 2 × 1023 D for JET-C. This is consistent with the faster decay of the H plasma concentration and the drop of the retention also by a similar factor when removing all the carbon components.Isotopic plasma wall changeover is also demonstrated to allow for removal of some D/T from the device. However, since plasma change over also contributes to long-term retention by codeposition, in ITER, change over in between each discharge might not be effective to reduce the fuel retention on the long-term.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000358467200244
%R 10.1016/j.jnucmat.2014.11.012
%U https://juser.fz-juelich.de/record/202198