% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @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}, }