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@ARTICLE{Bobkov:829654,
author = {Bobkov, V. and Aguiam, D. and Baruzzo, M. and Borodin, D.
and Borodkina, I. and Brezinsek, S. and Coffey, I. and
Colas, L. and Czarnecka, A. and Dumortier, P. and Durodie,
F. and Dux, R. and Faugel, H. and Fünfgelder, H. and
Giroud, C. and Goniche, M. and Hobirk, J. and Herrmann, A.
and Jacquot, J. and Jacquet, Ph. and Kallenbach, A. and
Krivska, A. and Klepper, C. C. and Lerche, E. and Menmuir,
S. and Milanesio, D. and Maggiora, R. and Monakhov, I. and
Nave, F. and Neu, R. and Noterdaeme, J.-M. and Ochoukov, R.
and Pütterich, Th. and Reinke, M. and Tuccilo, A. and
Tudisco, O. and Van Eester, D. and Wang, Y. and Yang, Q. and
Zhang, W. and Delabie, Ephrem},
title = {{P}rogress in reducing {ICRF}-specific impurity release in
{ASDEX} upgrade and {JET}},
journal = {Nuclear materials and energy},
volume = {12},
issn = {2352-1791},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2017-03315},
pages = {1194-1198},
year = {2016},
abstract = {Use of new 3-strap ICRF antennas with all-tungsten (W)
limiters in ASDEX Upgrade results in a reduction of the W
sources at the antenna limiters and of the W content in the
confined plasma by at least a factor of 2 compared to the
W-limiter 2-strap antennas used in the past. The reduction
is observed with a broad range of plasma shapes. In multiple
locations of antenna frame, the limiter W source has a
minimum when RF image currents are decreased by cancellation
of the RF current contributions of the central and the outer
straps. In JET with ITER-like wall, ITER-like antenna
produces about $20\%$ less of main chamber radiation and of
W content compared to the old A2 antennas. However the
effect of the A2 antennas on W content is scattered
depending on which antennas are powered. Experiments in JET
with trace nitrogen (N2) injection show that a presence of
active ICRF antenna close to the midplane injection valve
has little effect on the core N content, both in dipole and
in -90° phasing. This indicates that the effect of ICRF on
impurity transport across the scape-off-layer is small in
JET compared to the dominant effect on impurity sources
leading to increased impurity levels during ICRF operation.},
cin = {IEK-4 / PGI-5},
ddc = {333.7},
cid = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)PGI-5-20110106},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000417293300197},
doi = {10.1016/j.nme.2016.10.026},
url = {https://juser.fz-juelich.de/record/829654},
}