Transport analysis of tungsten and beryllium in JET hybrid plasmas with the ITER-like wall

0424357 - ÚFP 2014 RIV FR eng C - Conference Paper (international conference)
Mantica, P. - Angioni, C. - Valisa, M. - Baruzzo, M. - Belo, P. - Beurskens, M. - Challis, C. - Delabie, E. - Frassinetti, L. - Giroud, C. - Hawkes, N. - Hobirk, J. - Joffrin, E. - Lauro Taroni, L. - Lehnen, M. - Mlynář, Jan - Pütterich, T. - Romanelli, M. … Total 19 authors
Transport analysis of tungsten and beryllium in JET hybrid plasmas with the ITER-like wall.
EPS 2013:40th European Physical Society Conference on Plasma Physics, Contributed Papers. Mulhouse: European Physical Society, 2013, P4.141-P4.141. Europhysics Conference Abstracts (ECA). ISBN 2-914771-84-3.
[European Physical Society Conference on Plasma Physics/40./. Espoo (FI), 01.07.2013-05.07.2013]
Institutional support: RVO:61389021
Keywords : tokamak * JET * transport * tungsten * beryllium * hybrid plasmas
Subject RIV: BL - Plasma and Gas Discharge Physics
http://ocs.ciemat.es/EPS2013PAP/pdf/P4.141.pdf

The reestablishment of the hybrid scenario in JET after installation of the ITER-like wall (ILW) was successful in reaching similar global performances as in the previous Carbon Fibre Composite wall. However, these performances have only been maintained for 2-3 s, after which W accumulation in the core compromises the plasma performance, both due to radiative cooling and to the onset of MHD activity with negative effects on confinement. This paper aims at studying the dynamics of core W accumulation in hybrid plasmas, understanding its origin and possible ways to counteract it, to allow time extension of the improved confinement phase.
Permanent Link: http://hdl.handle.net/11104/0230437