Results 81 to 90 of about 330 (178)

Finite-β turbulence in Wendelstein 7-X enhanced by sub-threshold kinetic ballooning modes

Nuclear Fusion
Magnetic fluctuations affecting turbulence and transport, which are manifest at finite normalized plasma pressure β , pose a significant challenge to magnetic confinement fusion devices aiming to achieve high performance.
P. Mulholland, M.J. Pueschel, J.H.E. Proll, K. Aleynikova, B.J. Faber, P.W. Terry, C.C. Hegna, C. Nührenberg   +7 more
doaj   +1 more source

Particle transport in reduced turbulence neutral beam heated discharges at Wendelstein 7-X

Nuclear Fusion
A spontaneous reduction in anomalous particle transport in the plasma core is seen experimentally in reproducible, purely neutral beam heated plasma phases at Wendelstein 7-X (W7-X).
S. Bannmann, O. Ford, P.Zs. Poloskei, J. Svensson, A. Pavone, S. Kwak, U. Hoefel, E. Pasch, G. Fuchert, H.M. Smith, S. Lazerson, P. McNeely, N. Rust, D. Hartmann, R.C. Wolf, the W7-X Team   +15 more
doaj   +1 more source

Neural network-based surrogate model for 3D edge-plasma transport in the standard configuration of W7-X

Nuclear Fusion
This paper presents a neural‐network surrogate model for Wendelstein 7-X (W7-X) edge transport simulations, trained on an EMC3-EIRENE dataset that spans nearly the entire operating-parameter space currently explored in the W7-X standard configuration ...
Y. Luo, S. Xu, Y. Liang, E. Wang, J. Cai, A. Knieps, R. Pei, M. Tan, Y. Feng, D. Reiter, S. Brezinsek, D. Harting, M. Krychowiak, D. Gradic, M. Jakubowski, the W7-X Team   +15 more
doaj   +1 more source

Erratum: Confirmation of the topology of the Wendelstein 7-X magnetic field to better than 1:100,000. [PDF]

Nat Commun, 2017
Pedersen TS, Otte M, Lazerson S, Helander P, Bozhenkov S, Biedermann C, Klinger T, Wolf RC, Bosch HS, Wendelstein 7-X Team.   +9 more
europepmc   +1 more source

Design and experimental verification of a multi-pass ECRH plasma start-up scenario at a reduced magnetic field of 1.8 T at W7-X

Nuclear Fusion
Wendelstein 7-X (W7-X) nominally operates at a magnetic field of 2.5 T, but operation at a lower magnetic field strength is desired. The electron cyclotron resonance heating (ECRH) system of W7-X operates at 140 GHz, corresponding to second harmonic (X2)
Niklas Simon Polei, Torsten Stange, Kai Jakob Brunner, Olaf Grulke, Juan Fernando Guerrero Arnaiz, Laurent Krier, Heinrich Peter Laqua, Stefan Marsen, Dmitry Moseev, Burkhard Plaum, Sergiy Ponomarenko, Kian Rahbarnia, Georg Schlisio, Jonas Zimmermann, W7X-Team   +14 more
doaj   +1 more source

Key results from the first plasma operation phase and outlook for future performance in Wendelstein 7-X. [PDF]

Phys Plasmas, 2017
Sunn Pedersen T, Dinklage A, Turkin Y, Wolf R, Bozhenkov S, Geiger J, Fuchert G, Bosch HS, Rahbarnia K, Thomsen H, Neuner U, Klinger T, Langenberg A, Trimiño Mora H, Kornejew P, Knauer J, Hirsch M, W7-X Team, Pablant N.   +18 more
europepmc   +1 more source

Characterizing core and edge turbulence regimes with fluctuation imaging diagnostics in Wendelstein 7-X

Nuclear Fusion
Two density fluctuation imaging systems, phase contrast imaging (PCI) and gas puff imaging (GPI) measure spatially resolved density fluctuations with high time resolution throughout the core plasma (PCI) and in the scrape-off layer (GPI) of the ...
A. von Stechow, S.G. Baek, J.-P. Bähner, S. Ballinger, D. Cipciar, E.M. Edlund, G. Fuchert, O. Grulke, T. Gonda, S.K. Hansen, C. Killer, S. Kwak, M. Krychowiak, A. Langenberg, N. Pablant, E. Pasch, A. Pavone, M. Porkolab, J. Svensson, J.L. Terry, D. Zhang, the W7-X Team   +21 more
doaj   +1 more source

Bootstrapping of Corneal Optical Coherence Tomography Data to Investigate Conic Fit Robustness. [PDF]

J Clin Med, 2023
Langenbucher A, Szentmáry N, Cayless A, Münninghoff L, Wylegala A, Wendelstein J, Hoffmann P.   +6 more
europepmc   +1 more source

Impact of drift flows and turbulence on island divertor operation in Wendelstein 7-X

Nuclear Fusion
The island divertor in Wendelstein 7-X employs a chain of stationary magnetic islands to separate the confined plasma from the divertor targets. In this configuration, the scrape-off layer (SOL) exhibits complex patterns of counter-propagating bi-normal ...
Carsten Killer, Dario Cipciar, Arun Pandey, Valeria Perseo, Floris Scharmer, Seung Gyou Baek, Olaf Grulke, David Matthew Kriete, Felix Reimold, Adrian von Stechow, the W7-X Team   +10 more
doaj   +1 more source

Prediction of corneal power vectors after cataract surgery with toric lens implantation-A vector analysis. [PDF]

PLoS One, 2023
Langenbucher A, Szentmáry N, Cayless A, Wendelstein J, Hoffmann P.   +4 more
europepmc   +1 more source