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@ARTICLE{Fedorczak:202195,
author = {Fedorczak, N. and Monier-Garbet, P. and Pütterich, T. and
Brezinsek, S. and Devynck, P. and Dumont, R. and Goniche, M.
and Joffrin, E. and Lerche, E. and Lipschultz, B. and de la
Luna, E. and Maddison, G. and Maggi, C. and Matthews, G. and
Nunes, I. and Rimini, F. and Solano, E. R. and Tamain, P.
and Tsalas, M. and de Vries, P.},
title = {{T}ungsten transport and sources control in {JET}
{ITER}-like wall {H}-mode plasmas},
journal = {Journal of nuclear materials},
volume = {463},
issn = {0022-3115},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2015-04484},
pages = {85 - 90},
year = {2015},
abstract = {A set of discharges performed with the JET ITER-like wall
is investigated with respect to control capabilities on
tungsten sources and transport. In attached divertor
regimes, increasing fueling by gas puff results in higher
divertor recycling ion flux, lower divertor tungsten source,
higher ELM frequency and lower core plasma radiation,
dominated by tungsten ions. Both pedestal flushing by ELMs
and divertor screening (including redeposition) are possibly
responsible. For specific scenarios, kicks in plasma
vertical position can be employed to increase the ELM
frequency, which results in slightly lower core radiation.
The application of ion cyclotron radio frequency heating at
the very center of the plasma is efficient to increase the
core electron temperature gradient and flatten electron
density profile, resulting in a significantly lower central
tungsten peaking. Beryllium evaporation in the main chamber
did not reduce the local divertor tungsten source whereas
core radiation was reduced by approximately $50\%.$},
cin = {IEK-4},
ddc = {530},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000358467200013},
doi = {10.1016/j.jnucmat.2014.12.044},
url = {https://juser.fz-juelich.de/record/202195},
}