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@ARTICLE{Kaveeva:904055,
author = {Kaveeva, Elizaveta and Rozhansky, Vladimir and Veselova,
Irina and Senichenkov, Ilya and Giroud, Carine and Pitts,
Richard A. and Wiesen, Sven and Voskoboynikov, Serguey},
title = {{SOLPS}-{ITER} drift modelling of {JET} {N}e and {N}-seeded
{H}-modes},
journal = {Nuclear materials and energy},
volume = {28},
issn = {2352-1791},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-05625},
pages = {101030 -},
year = {2021},
abstract = {A numerical study is presented, using the SOLPS-ITER plasma
boundary code with full drifts and currents activated, of
impurity seeded JET discharges in support of high power
H-mode experimental campaigns designed to compare two ITER
candidate seeding species, nitrogen (N) and neon (Ne).
Fluid-kinetic edge plasma simulations are first performed at
lower levels of power into the scrape-off layer (SOL) and
benchmarked against existing JET experimental data.
Calculations are then performed for higher levels of SOL
power to examine the impact of this key parameter on the
efficiency of both radiators. From the code point of view,
for the chosen JET parameters, Ne can be as efficient a
divertor radiator as N at the same level of upstream
separatrix Zeff < 1.5 for moderate seeding, decreasing the
peak power at outer target by factor ~ 3. Full detachment
(state with the temperature below 5 eV along all the target)
at the outer target can be obtained with both impurities at
higher seeding, but in the case of Ne this leads to a higher
Zeff and significant radiation in the main SOL/pedestal. The
indications from this JET code modelling, in comparison with
previous similar simulations for ITER and ASDEX Upgrade with
drifts turned on, are that there is a beneficial impact of
machine size in improving impurity retention, substantiating
the claim that both N and Ne will perform well as seed
impurities for divertor power dissipation in ITER.},
cin = {IEK-4},
ddc = {624},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
pid = {G:(DE-HGF)POF4-134},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000691495500002},
doi = {10.1016/j.nme.2021.101030},
url = {https://juser.fz-juelich.de/record/904055},
}