Results 51 to 60 of about 311,028 (224)

Surface features of strongly heated bulk tungsten divertor plates at ASDEX Upgrade

Nuclear Materials and Energy, 2023
Solid tungsten tiles exposed at the outer strike point module of the ASDEX Upgrade divertor show cracks parallel to surface in the bulk and humps at the surface. At ASDEX Upgrade these horizontal cracks were observed for the first time. About 10 % of all
V. Rohde, M. Balden, K. Hunger, I. Zammuto, A. Herrmann, R. Neu   +5 more
doaj   +1 more source

Solitary magnetic perturbations at the ELM onset [PDF]

, 2012
Edge localised modes (ELMs) allow maintaining sufficient purity of tokamak H-mode plasmas and thus enable stationary H-mode. On the other hand in a future device ELMs may cause divertor power flux densities far in excess of tolerable material limits. The
A. Burckhart, Becoulet M., Bobkov V., Boom J., Braams B.J., Burckhart A., C. Fuchs, E. Viezzer, F. Sommer, Federici G., Fischer R., Fundamenski W., H. Zohm, H.K. Park, H.W. Müller, Huysmans G., Hölzl M., J.E. Boom, Kass T., Kirk A., Koslowski H., Loarte A., Luhmann N.C., M. Garcia-Munoz, M. Hölzl, M. Maraschek, M.G. Dunne, Neuhauser J., Nunes I., P.A. Schneider, Perez C., R. Dux, R. Fischer, R.P. Wenninger, Ryter F., Schirmer J., Schmid A., Schmid A., Snyder P., Sommer F., T. Eich, T. Lunt, V. Igochine, Valovic M., W. Suttrop, Zohm H.   +45 more
core   +2 more sources

Safety Analysis in Large Volume Vacuum Systems Like Tokamak: Experiments and Numerical Simulation to Analyze Vacuum Ruptures Consequences

Advances in Materials Science and Engineering, Volume 2014, Issue 1, 2014., 2014
The large volume vacuum systems are used in many industrial operations and research laboratories. Accidents in these systems should have a relevant economical and safety impact. A loss of vacuum accident (LOVA) due to a failure of the main vacuum vessel can result in a fast pressurization of the vessel and consequent mobilization dispersion of ...
A. Malizia, I. Lupelli, M. Richetta, M. Gelfusa, C. Bellecci, P. Gaudio, S. K. S. Parashar   +6 more
wiley   +1 more source

Electric field and turbulence in global Braginskii simulations across the ASDEX Upgrade edge and scrape-off layer

, 2021
Turbulence simulations in diverted geometry across the edge and scrape-off layer (SOL) of ASDEX Upgrade are performed with the GRILLIX code (Stegmeir et al 2019 Phys. Plasmas 26 052517).
W. Zholobenko, T. Body, P. Manz, A. Stegmeir, Ben Zhu, M. Griener, G. D. Conway, D. Coster, F. Jenko   +8 more
semanticscholar   +1 more source

Feedback-controlled NTM stabilization on ASDEX Upgrade

EPJ Web of Conferences, 2015
On ASDEX Upgrade a concept for real-time stabilization of NTMs has been realized and successfully applied to (3,2)- and (2,1)-NTMs. Since most of the work has meanwhile been published elsewhere, a short summary with the appropriate references is given ...
Stober J., Barrera L., Behler K., Bock A., Buhler A., Eixenberger H., Giannone L., Kasparek W., Maraschek M., Mlynek A., Monaco F., Poli E., Rapson C.J., Reich M., Schubert M., Treutterer W., Wagner D., Zohm H.   +17 more
doaj   +1 more source

Pedestal and Er profile evolution during an edge localized mode cycle at ASDEX Upgrade [PDF]

, 2017
The upgrade of the edge charge exchange recombination spectroscopy diagnostic at ASDEX Upgrade has enabled highly spatially resolved me asurements of the impurity ion dynamics during an edge-localized mode cycle ( ELM ) with unprecedented temp ...
A Burckhart, A Lebschy, E Viezzer, E Wolfrum, F M Laggner, F Mink, M Cavedon, M Dunne, M Willensdorfer, null null, R Fischer, T Pütterich, U Stroth   +12 more
core   +3 more sources

Non-linear effects in electron cyclotron current drive applied for the stabilization of neoclassical tearing modes [PDF]

, 2014
Due to the smallness of the volumes associated with the flux surfaces around the O-point of a magnetic island, the electron cyclotron power density applied inside the island for the stabilization of neoclassical tearing modes (NTMs) can exceed the ...
Ayten, B., Team, ASDEX Upgrade, Westerhof, E.   +2 more
core   +2 more sources

Validation of gyrokinetic modelling of light impurity transport including rotation in ASDEX Upgrade [PDF]

, 2013
Upgraded spectroscopic hardware and an improved impurity concentration calculation allow accurate determination of boron density in the ASDEX Upgrade tokamak.
Angioni, C., Camenen, Y., Casson, F. J., Dux, R., Fable, E., Fischer, R., Geiger, B., Manas, P., McDermott, R. M., Menchero, L., Tardini, G., team, ASDEX Upgrade   +11 more
core   +3 more sources

X-point radiation, its control and an ELM suppressed radiating regime at the ASDEX Upgrade tokamak

Nuclear Fusion, 2020
Future fusion reactors require a safe, steady state divertor operation. The required detached operation is, in tokamaks with metal walls, usually achieved by seeding of impurities, such as nitrogen.
M. Bernert, F. Janky, B. Sieglin, A. Kallenbach, B. Lipschultz, F. Reimold, M. Wischmeier, M. Cavedon, P. David, M. Dunne, M. Griener, O. Kudlacek, R. McDermott, W. Treutterer, E. Wolfrum, D. Brida, O. Février, S. Henderson, M. Komm   +18 more
semanticscholar   +1 more source

Confinement in electron heated plasmas in Wendelstein 7-X and ASDEX Upgrade; the necessity to control turbulent transport

Nuclear Fusion, 2021
In electron (cyclotron) heated plasmas, in both ASDEX Upgrade (L-mode) and Wendelstein 7-X, clamping of the ion temperature occurs at T i ∼ 1.5 keV independent of magnetic configuration.
M. Beurskens, C. Angioni, S. Bozhenkov, O. Ford, C. Kiefer, P. Xanthopoulos, Y. Turkin, J. Alcuson, J. P. Baehner, C. Beidler, G. Birkenmeier, E. Fable, G. Fuchert, B. Geiger, O. Grulke, M. Hirsch, M. Jakubowski, H. Laqua, A. Langenberg, S. Lazerson, N. Pablant, M. Reisner, P. Schneider, E. Scott, T. Stange, A. von Stechow, J. Stober, U. Stroth, T. Wegner, G. Weir, D. Zhang, A. Zocco, R. Wolf, H. Zohm, the W7-X team, the ASDEX Upgrade team, the Eurofusion MST1 Team   +36 more
semanticscholar   +1 more source