Results 1 to 10 of about 6,417 (201)

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   +4 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.
exaly   +2 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

On the interaction between the island divertor heat fluxes, the scrape-off layer radial electric field and the edge turbulence in Wendelstein 7-X plasmas

Nuclear Fusion, 2022
The formation of the radial electric field, $E_\textrm{r}$ in the scrape-off layer (SOL) has been experimentally studied for attached divertor conditions in stellarator W7-X.
E. Maragkoudakis, D. Carralero, T. Estrada, T. Windisch, Y. Gao, C. Killer, M. Jakubowski, A. Puig Sitjes, F. Pisano, H. Sándor, M. Vecsei, S. Zoletnik, A. Cappa, the W7-X Team   +13 more
doaj   +1 more source

Configuration Management for Wendelstein 7-X [PDF]

Fusion Engineering and Design, 2009
A complex system like the large superconducting Wendelstein 7-X stellarator necessitates a dedicated organizational structure which assures permanent consistency between the requirements of its system specification and the performance attributes of all its components throughout its life time.
Brakel, R., van Eeten, P., Hartmann, D. A., Henkelmann, K., Knauer, J., Müller, K., Okkenga-Wolf, A., Wenzel, U.   +7 more
openaire   +3 more sources

Hydrogen content in divertor baffle tiles in Wendelstein 7-X

Nuclear Materials and Energy, 2021
Plasma–wall interactions play a crucial role for the performance of fusion devices and the lifetime of plasma-facing components. In this work the results of some plasma–wall interaction processes, namely the erosion/deposition pattern and the fuel ...
Jannis Oelmann, Erik Wüst, Sebastijan Brezinsek, Cong Li, Dongye Zhao, Marcin Rasinski, Chandra Prakash Dhard, Matej Mayer, Dirk Naujoks, Yu Gao   +9 more
doaj   +1 more source

ECE Diagnostic for the initial Operation of Wendelstein 7-X [PDF]

EPJ Web of Conferences, 2019
The ECE diagnostic at W7-X in its standard mode of operation measures in X2 mode polarization with a 32 channel radiometer in the frequency band around 140 GHz for central magnetic field 2.5T.
Hirsch Matthias, Höfel Udo, Oosterbeek Johan Willem, Chaudhary Neha, Geiger Joachim, Hartfuss Hans-Jürgen, Kasparek Walter, Marushchenko Nikolai, van Milligen Boudewijn, Plaum Burkhard, Stange Torsten, Svensson Jakob, Tsuchiya Hayato, Wagner Dietmar, McWeir Gavin, Wolf Robert   +15 more
doaj   +1 more source

Reflectometry for Wendelstein 7-X [PDF]

Nuclear Fusion, 2006
Diagnostic equipment for the fully optimized stellarator Wendelstein 7-X involves a reflectometry system dedicated to measuring edge density profiles and characterizing density perturbations and their poloidal propagation velocity. Preparatory work such as design activities and the installation of a first antenna pair belongs to the so-called start-up ...
Hirsch, M., Holzhauer, E., Hartfuss, H.
openaire   +3 more sources