Results 1 to 10 of about 330 (178)

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

Nature Communications, 2016
Early stellarator designs suffered from high particle losses, an issue that can be addressed by optimization of the coils. Here the authors measure the magnetic field lines in the Wendelstein 7-X stellarator, confirming that the complicated design of the
T. Sunn Pedersen, M. Otte, S. Lazerson, P. Helander, S. Bozhenkov, C. Biedermann, T. Klinger, R. C. Wolf, H. -S. Bosch, The Wendelstein 7-X Team   +9 more
doaj   +2 more sources

Predictive Correction Model for Corneal Back Surface Astigmatism With IOLMaster700 Keratometry Data in a Cataractous Population. [PDF]

Clin Exp Ophthalmol
ABSTRACT Background To develop and validate various models to predict total keratometry (TK) power vector components TKC0 and TKC45 from classical keratometry (K) KC0 and KC45 based on a large dataset of pre cataract surgery IOLMaster 700 measurements.
Langenbucher A, Hoffmann P, Cayless A, Szentmáry N, Riaz K, Gatinel D, Findl O, Pantanelli S, Yeo TK, Savini G, Wendelstein J.   +10 more
europepmc   +2 more sources

Deciphering the performance of different surface models for corneal topography. [PDF]

Ophthalmic Physiol Opt
Abstract Purpose To study the performance of different corneal surface models to be used for ray tracing. Models based on geometric surfaces and polynomial fits were compared and the differences discussed. Methods For this simulation study, five characteristic generic surface configurations were generated: (A) perfect biconic, (B) decentred biconic ...
Langenbucher A, Szentmáry N, Cayless A, Hoffmann P, Wendelstein J.   +4 more
europepmc   +2 more sources

Structural Cerebral Correlates of Perplexity: Exploring a Linguistic Marker in Cognitive Aging. [PDF]

Psych J
ABSTRACT Language changes are among the earliest indicators of cognitive decline in aging. Perplexity, a linguistic measure derived from information theory that quantifies speech predictability, has emerged as a potential marker for detecting early cognitive changes. However, its underlying neural substrates remain unclear.
Wang X, Herold CJ, Frankenberg C, Ablimit A, Schultz T, Kong L, Schröder J.   +6 more
europepmc   +2 more sources

Status of Wendelstein 7-X construction [PDF]

Fusion Engineering and Design, 2009
Wendelstein 7-X (W7-X) represents the continuation of fusion experiments of the stellarator type at the Max-Planck Institute for Plasma Physics (IPP). The aim of W7-X is to demonstrate the suitability for a fusion reactor of this alternative type of magnetically confined plasma experiment.
L Wegener
exaly   +2 more sources

Preparation of the Wendelstein 7-X commissioning [PDF]

2013 IEEE 25th Symposium on Fusion Engineering (SOFE), 2013
Assembly of the superconducting stellarator Wendelstein 7-X is well advanced, and commissioning of the device is being prepared. A first draft of the commissioning tasks has been developed and will be discussed in this paper.
Hans-Stephan Bosch
exaly   +3 more sources

Real-Time Detection of Overloads on the Plasma-Facing Components of Wendelstein 7-X

Applied Sciences (Switzerland), 2021
Wendelstein 7-X (W7-X) is the leading experiment on the path of demonstrating that stellarators are a feasible concept for a future power plant. One of its major goals is to prove quasi-steady-state operation in a reactor-relevant parameter regime.
Yu Gao, , Barbara Cannas
exaly   +3 more sources

The ECRH-Power Upgrade at the Wendelstein 7-X Stellarator [PDF]

EPJ Web of Conferences, 2023
The existing ECRH system at W7-X consists of 10 gyrotrons, with output power levels ranging from 0.6 MW up to 1.0 MW each at a frequency of 140 GHz, quasi-optical transmission lines and microwave launchers at the plasma vessel.
Laqua H. P., Avramidis K. A., Braune H., Chelis I., Gantenbein G., Illy S., Ioannidis Z., Jelonnek J., Jin J., Krier L., Lechte C., Leggieri A., Legrand F., Marsen S., Moseev D., Oosterbeek H., Rzesnicki T., Ruess T., Stange T., Thumm M., Tigelis I., Wolf R. C.   +21 more
doaj   +1 more source

Tungsten based divertor development for Wendelstein 7-X

Nuclear Materials and Energy, 2023
Wendelstein 7-X, the world’s largest superconducting stellarator in Greifswald (Germany), started plasma experiments with a water-cooled plasma-facing wall in 2022, allowing for long pulse operation. In parallel, a project was launched in 2021 to develop
Joris Fellinger, M. Richou, G. Ehrke, M. Endler, F. Kunkel, D. Naujoks, Th. Kremeyer, A. Menzel-Barbara, Th. Sieber, J-F. Lobsien, R. Neu, J. Tretter, Z. Wang, J-H. You, H. Greuner, K. Hunger, P. Junghanns, O. Schneider, M. Wirtz, Th. Loewenhoff, A. Houben, A. Litnovsky, P-E. Fraysinnes, P. Emonot, S. Roccella, O. Widlund, B. Končar, M. Tekavčič   +27 more
doaj   +1 more source

Quantitative comparison of impurity transport in turbulence reduced and enhanced scenarios at Wendelstein 7-X

Nuclear Fusion, 2023
We assess the turbulent particle transport being responsible for the limitation of the confinement and, thus, the overall performance of the neoclassically optimized stellarator Wendelstein 7-X.
J.A. Alcusón, Th. Wegner, A. Dinklage, A. Langenberg, J.-P. Bähner, B. Buttenschön, E.M. Edlund, G. Fuchert, J.M. García-Regaña, O. Grulke, Z. Huang, M. Porkolab, A.V. Stechow, P. Xanthopoulos, A. Zocco, the W7-X Team   +15 more
doaj   +1 more source