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@ARTICLE{Liu:862507,
author = {Liu, S. C. and Liang, Y. and Drews, P. and Killer, C. and
Knieps, A. and Xu, G. S. and Wang, H. Q. and Yan, N. and
Han, X. and Höschen, D. and Krämer-Flecken, A. and
Nicolai, D. and Satheeswaran, G. and Hammond, K. and Cai, J.
Q. and Charl, A. and Cosfeld, J. and Fuchert, G. and Gao, Y.
and Geiger, J. and Grulke, O. and Henkel, M. and Hirsch, M.
and Hoefel, U. and König, R. and Li, Y. and Neubauer, O.
and Pasch, E. and Rahbarnia, K. and Rack, M. and Sandri, N.
and Sereda, S. and Schweer, B. and Wang, E. H. and Xu, S.
and Gao, X.},
title = {{T}he effects of magnetic topology on the scrape-off layer
turbulence transport in the first divertor plasma operation
of {W}endelstein 7-{X} using a new combined probe},
journal = {Nuclear fusion},
volume = {59},
number = {6},
issn = {1741-4326},
address = {Vienna},
publisher = {IAEA},
reportid = {FZJ-2019-02811},
pages = {066001 -},
year = {2019},
abstract = {Wendelstein 7-X (W7-X) was operated successfully with the
first divertor plasma in the operation phase 1.2a (OP1.2a).
A new combined probe head, developed and installed on the
multiple-purpose manipulator, is able to measure the edge
plasma profiles (), variation of magnetic field, poloidal
and radial turbulence structures. The scrape-off layer (SOL)
plasma parameters in two magnetic configurations (standard
and high mirror) are in good agreement with the magnetic
island structure and the field line connection length
calculated by the field line tracer. In both the standard
and high mirror configurations, the radial turbulent heat
flux and particle flux have strong dependence on the local
magnetic topology, revealing two distinct transport
patterns: a broadband turbulence dominant region in the
outer SOL and a low frequency dominant region in the inner
SOL. In the standard divertor configuration, the broadband
turbulence with a frequency range of 40–120 kHz is
located near the island center along the probe path, leading
to outward transport. These broadband fluctuations propagate
with a velocity of 2.3–4.4 km s−1 poloidally along the
ion diamagnetic drift direction in the plasma frame, with
close to 0.1. The large radial transport induced by the
broadband turbulence is accompanied by a steep electron
density gradient. The low frequency (5–30 kHz) dominant
transport exhibits obvious intermittent structure. Some
statistical techniques are applied to the characterization
of the intermittent transport.},
cin = {IEK-4 / ICS-8},
ddc = {620},
cid = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)ICS-8-20110106},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000465976300001},
doi = {10.1088/1741-4326/ab0d29},
url = {https://juser.fz-juelich.de/record/862507},
}