The impact of the ITER-like wall at JET on disruptions

TitleThe impact of the ITER-like wall at JET on disruptions
Publication TypeJournal Article
Year of Publication2012
AuthorsP.C de Vries, G. Arnoux, A. Huber, J. Flanagan, M. Lehnen, V. Riccardo, C. Reux, S. Jachmich, C. Lowry, G. Calabro, D. Frigione, M. Tsalas, N. Hartmann, S. Brezinsek, M. Clever, D. Douai, M. Groth, T.C Hender, E. Hodille, E. Joffrin, U. Kruezi, G.F Matthews, J. Morris, R. Neu, V. Philipps, G. Sergienko, M. Sertoli, JET-EFDA Contributors
JournalPlasma Physics and Controlled Fusion
Volume54
Number12
Pagination124032
Abstract

The new full-metal ITER-like wall (ILW) at JET was found to have a profound impact on the physics of disruptions. The main difference is a significantly lower fraction (by up to a factor of 5) of energy radiated during the disruption process, yielding higher plasma temperatures after the thermal quench and thus longer current quench times. Thus, a larger fraction of the total energy was conducted to the wall resulting in larger heat loads. Active mitigation by means of massive gas injection became a necessity to avoid beryllium melting already at moderate levels of thermal and magnetic energy (i.e. already at plasma currents of 2 MA). A slower current quench, however, reduced the risk of runaway generation. Another beneficial effect of the ILW is that disruptions have a negligible impact on the formation and performance of the subsequent discharge.

URLhttp://stacks.iop.org/0741-3335/54/i=12/a=124032
DOI10.1088/0741-3335/54/12/124032
Division

FP

Department

PDG

PID

1e0b08fe9823c2528fcb1a3775b20f30

Alternate TitlePlasma Phys. Control. Fusion
LabelOA

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