This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2014.11.012 in citations.
Plasma isotopic change over experiments in JET under Carbon and ITER-Like Wall conditions
Plasma isotopic change over experiments in JET under Carbon and ITER-Like Wall conditions
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 injecti...
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Personal Name(s): | Loarer, T. (Corresponding Author) |
---|---|
Brezinsek, S. / Philipps, V. / Romanelli-Gruenhagen, S. / Alves, D. / Carvalho, I. / Douai, D. / Esser, H. G. / Felton, R. / Frigione, D. / Kruezi, U. / Reux, C. / Smith, R. / Stamp, M. F. / Vartanian, S. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Journal of nuclear materials, 463 (2015) S. 1117 - 1121 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2015
|
DOI: |
10.1016/j.jnucmat.2014.11.012 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Publikationsportal JuSER |
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. |