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@ARTICLE{Liu:858021,
author = {Liu, Shaocheng and Liang, Yunfeng and Drews, P. and
Krämer-Flecken, A. and Han, X. and Nicolai, D. and
Satheeswaran, G. and Wang, N. C. and Cai, J. Q. and Charl,
A. and Cosfeld, J. and Fuchert, G. and Gao, Yu and Geiger,
J. and Grulke, O. and Henkel, M. and Hirsch, M. and Hoefel,
U. and Hollfeld, K. P. and Höschen, D. and Killer, C. and
Knieps, A. and König, R. and Neubauer, O. and Pasch, E. and
Rahbarnia, K. and Rack, M. and Sandri, N. and Sereda, S. and
Schweer, B. and Wang, Erhui and Wei, Yanling and Weir, G.
and Windisch, T.},
title = {{O}bservations of the effects of magnetic topology on the
{SOL} characteristics of an electromagnetic coherent mode in
the first experimental campaign of {W}7-{X}},
journal = {Nuclear fusion},
volume = {58},
number = {4},
issn = {1741-4326},
address = {Vienna},
publisher = {IAEA},
reportid = {FZJ-2018-06965},
pages = {046002 -},
year = {2018},
abstract = {Turbulence is considered to play an important role in the
edge cross field heat and particle transport in fusion
devices. Scrape-off layer (SOL) turbulence characteristics
were measured by the combined probe mounted on the
multi-purpose manipulator during the first experimental
campaign of W7-X. An electromagnetic coherent mode (EMCM) at
7 kHz has been observed by multiple diagnostics in both
the plasma core and the SOL and exhibits a strong dependence
of the magnetic topology. As demonstrated by the
measurements of the combined probe, the EMCM starts to
appear at a radius of R = 6.15 m along the path of
probe measurement and this location is shifted inwards in
higher iota configurations. It propagates along the
direction of electron diamagnetic drift in the far SOL with
a poloidal velocity about 0.6 km s−1 while it turns to the
opposite direction gradually in the near SOL in the
laboratory frame, but keeps a velocity of about 0.6–0.7 km
s−1 along the direction of electron diamagnetic drift in
the plasma frame. This mode can be induced by raising the
ECRH heating power in similar discharge conditions, which is
probably linked to the gradient of electron temperature and
pressure. The EMCM is enhanced significantly in the edge
magnetic island with long connection length where the EMCM
can grow up due to the long particle confinement time.},
cin = {IEK-4},
ddc = {620},
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:000424504400002},
doi = {10.1088/1741-4326/aaa98e},
url = {https://juser.fz-juelich.de/record/858021},
}