Results 41 to 50 of about 452,681 (253)

Overview over the neutral gas pressures in Wendelstein 7-X during divertor operation under boronized wall conditions

Plasma Physics and Controlled Fusion, 2023
During the first test divertor campaign of the stellarator experiment Wendelstein 7-X (Pedersen et al 2022 Nucl. Fusion 62 042022), OP1.2b, 13 neutral gas pressure gauges collected data in different locations in the plasma vessel, enabling a detailed ...
V. Haak, S. Bozhenkov, Yuhe Feng, Amit K. Kharwandikar, T. Kremeyer, D. Naujoks, V. Perseo, G. Schlisio, U. Wenzel   +8 more
semanticscholar   +1 more source

ICRH simulations for the Wendelstein 7-X stellarator [PDF]

EPJ Web of Conferences
We present the current status of ion-cyclotron-resonance heating (ICRH) simulations for Wendelstein 7-X (W7-X), a large, superconducting, optimized stellarator in Greifswald, Germany.
Slaby Christoph, Smith Håkan M., Graves Jonathan P., Lazerson Samuel A.   +3 more
doaj   +1 more source

Detecting Plasma Detachment in the Wendelstein 7-X Stellarator Using Machine Learning

Applied Sciences, 2021
The detachment regime has a high potential to play an important role in fusion devices on the road to a fusion power plant. Complete power detachment has been observed several times during the experimental campaigns of the Wendelstein 7-X (W7-X ...
Máté Szűcs, Tamás Szepesi, Christoph Biedermann, Gábor Cseh, Marcin Jakubowski, Gábor Kocsis, Ralf König, Marco Krause, Valeria Perseo, Aleix Puig Sitjes, The Team W7-X   +10 more
doaj   +1 more source

A newcomer: the Wendelstein 7-X Stellarator [PDF]

Europhysics News, 2016
T his development has led to the large “Model-C” stellarator, operated at PPPL from 1961-1969 until it was converted into the “Symmetric Tokamak” in 1970, after breakthrough results reported from Russian tokamaks in 1968. The first “Wendelstein” stellarator, the “1-A” went into operation in 1960 at the Max-Planck Institute for Physics and Astrophysics.
openaire   +2 more sources

Depth resolved analysis of hydrogen in W7-X graphite components using laser-induced ablation-quadrupole mass spectrometry (LIA-QMS)

Nuclear Materials and Energy, 2019
A deep understanding of the plasma-wall interaction processes in fusion devices like Wendelstein 7-X is necessary for an efficient plasma operation and a long lifetime of the plasma-facing components.In this work we present an approach employing residual
Jannis Oelmann, Cong Li, Sebastijan Brezinsek, Marcin Rasinski, Chandra Prakash Dhard, Ralf König, Victoria Winters, Christian Linsmeier   +7 more
doaj   +1 more source

Physics-regularized neural network of the ideal-MHD solution operator in Wendelstein 7-X configurations

Nuclear Fusion, 2023
The computational cost of constructing 3D magnetohydrodynamic (MHD) equilibria is one of the limiting factors in stellarator research and design. Although data-driven approaches have been proposed to provide fast 3D MHD equilibria, the accuracy with ...
Andrea Merlo, Daniel Böckenhoff, Jonathan Schilling, Samuel Aaron Lazerson, Thomas Sunn Pedersen, the W7-X Team   +5 more
doaj   +1 more source

Configuration Space Control for Wendelstein 7‐X [PDF]

Contributions to Plasma Physics, 2010
AbstractThe Wendelstein 7‐X stellarator (W7‐X) is a superconducting fusion experiment presently under construction at the Greifswald branch of the Max‐Planck‐Institut für Plasmaphysik in Greifswald, Germany. W7‐X is a device with extreme geometrical complexity due to the close‐packing of components inside the cryostat and their complex three ...
Dodson, T., Baylard, C., Hartmann, D., Greve, H., Herold, F.   +4 more
openaire   +2 more sources

Overview of the results from divertor experiments with attached and detached plasmas at Wendelstein 7-X and their implications for steady-state operation

Nuclear Fusion, 2021
Wendelstein 7-X (W7-X), the largest advanced stellarator, is built to demonstrate high power, high performance quasi-continuous operation. Therefore, in the recent campaign, experiments were performed to prepare for long pulse operation, addressing three
M. Jakubowski, M. Endler, Y. Feng, Y. Gao, C. Killer, R. König, M. Krychowiak, V. Perseo, F. Reimold, O. Schmitz, T. Pedersen, S. Brezinsek, A. Dinklage, P. Drewelow, H. Niemann, M. Otte, M. Gruca, K. Hammond, T. Kremeyer, M. Kubkowska, S. Jabłoński, A. Pandey, G. Wurden, D. Zhang, S. Bozhenkov, D. Böckenhoff, C. Dhard, J. Baldzuhn, D. Gradic, F. Effenberg, P. Kornejew, S. Lazerson, J. Lore, D. Naujoks, A. Puig Sitjes, G. Schlisio, M. Ślęczka, U. Wenzel, V. Winters, the W7-X team   +39 more
semanticscholar   +1 more source

Inhibition of parametric decay in heating microwave beams during fluctuations of the density profile in the edge island of Wendelstein 7-X

Plasma Physics and Controlled Fusion, 2022
Experimental evidence of parametric decay instability (PDI) is observed in the Wendelstein 7-X stellarator, when high-power microwave beams cross a stationary magnetic island at the plasma edge.
A. Tancetti, S. Nielsen, J. Rasmussen, D. Moseev, Torsten Stange, S. Marsen, M. Vécsei, C. Killer, G. Wurden, T. Jensen, M. Stejner, G. Anda, D. Dunai, S. Zoletnik, K. Rahbarnia, C. Brandt, H. Thomsen, M. Hirsch, U. Höfel, N. Chaudhary, V. Winters, P. Kornejew, Jeffrey H Harris, H. Laqua   +23 more
semanticscholar   +1 more source

Optimization of flux-surface density variation in stellarator plasmas with respect to the transport of collisional impurities [PDF]

, 2019
Avoiding impurity accumulation is a requirement for steady-state stellarator operation. The accumulation of impurities can be heavily affected by variations in their density on the flux-surface.
Buller, Stefan, Mollén, Albert, Newton, Sarah Louise, Pusztai, Istvan, Smith, Håkan M.   +4 more
core   +2 more sources