Plasma isotopic change over experiments in JET under Carbon and ITER-Like Wall conditions

Content Provider	Semantic Scholar
Author	Loarer, Th. Brezinsek, Sebastijan Philipps, V. Romanelli-Gruenhagen, S. Alves, Diogo Carvalho, Ivo S. Douai, David Esser, H. Gunter Felton, Robert Frigione, Domenico Kruezi, Uron Reux, Cedric Smith, Roger Stamp, M. F. Vartanian, S.
Copyright Year	2015
Abstract	Abstract Starting with a wall loaded by H 2 , change over experiments from H 2 to D 2 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: I p = 2.0 MA, B T = 2.4 T, 〈 n e 〉 = 4.5 × 10 19 m −3 with a constant gas injection of 3.0 × 10 21 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 × 10 22 D compared to 2 × 10 23 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.
Starting Page	1117
Ending Page	1121
Page Count	5
File Format	PDF HTM / HTML
DOI	10.1016/j.jnucmat.2014.11.012
Volume Number	463
Alternate Webpage(s)	http://www.euro-fusionscipub.org/wp-content/uploads/2015/04/EFDC140608.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.jnucmat.2014.11.012
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article