Results 71 to 80 of about 416,653 (194)

Low frequency sawtooth precursor activity in ASDEX Upgrade [PDF]

, 2011
This paper describes the precursor activity observed in the ASDEX Upgrade tokamak before sawtooth crashes in various neutral beam heated plasmas, utilizing the soft x-ray diagnostic. In addition to the well-known (m, n) = (1,1) internal kink mode and its
M Maraschek, Lazányi, Nóra, Pokol, Gergö,, Pokol, Gergö, Horvath, L., V Igochine, Pokol, Gerg\uf6, N Lazányi, Pokol, G. I., A Magyarkuti, L Horváth, Horv\ue1th, L\ue1szl\uf3, Por, G., G Papp, Igochine, Valentin, G Por, G I Pokol, Papp, Gergely,, Magyarkuti, A., Igochine, V., Laz\ue1nyi, N\uf3ra, Por, Gabor, ASDEX Upgrade Team, Magyarkuti, András, Team, ASDEX Upgrade, Papp, G., Horváth, László, null null, Pokol, G., Maraschek, Marc, Magyarkuti, Andr\ue1s, Lazanyi, N., Papp, Gergely   +32 more
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Overview of the isotope effects in the ASDEX Upgrade tokamak

Plasma Physics and Controlled Fusion, 2021
In recent years, measurements on the ASDEX Upgrade tokamak and modelling performed for plasmas with hydrogen (H) and deuterium (D) as the main gas have improved our understanding of the ion mass dependencies in fusion plasmas.
P. Schneider, P. Hennequin, N. Bonanomi, M. Dunne, Garrard D. Conway, U. Plank   +5 more
semanticscholar   +1 more source

Non-linear extended MHD simulations of type-I edge localised mode cycles in ASDEX Upgrade and their underlying triggering mechanism [PDF]

Nuclear Fusion, 2020
A triggering mechanism responsible for the explosive onset of edge localised modes (ELMs) in fusion plasmas is identified by performing, for the first time, non-linear magnetohydrodynamic simulations of repetitive type-I ELMs.
A. Cathey, M. Hoelzl, K. Lackner, G. Huijsmans, M. Dunne, E. Wolfrum, S. Pamela, F. Orain, S. Günter, Jorek Team, E. Team   +10 more
semanticscholar   +1 more source

New boronization system at ASDEX Upgrade

, 2021
The coating of plasma facing components (PFC) with boron significantly improves the performance of plasma operation in magnetic fusion devices. The boron layer traps residual oxygen in the vacuum vessel, thus reducing radiative losses due to collisions ...
M. Dibon, V. Rohde, F. Stelzer, K. Hegele, M. Uhlmann   +4 more
semanticscholar   +1 more source

Electron cyclotron resonance heating in ASDEX upgrade: Calculation and experimental authentication of the power deposition profile [PDF]

, 2002
In this paper we present global and local studies of the ECRH power deposition in ASDEX Upgrade. It is organized as follows. Section 2 briefly describes ASDEX Upgrade and its ECRH system.
Pereverzev, G., Leuterer, F., Ryter, F., Kirov, K., Max-Planck-Institut fuer Plasmaphysik, Garching (Germany), Suttrop, W., ASDEX Upgrade Team   +6 more
core  

Arc behaviour on different materials in ASDEX Upgrade

Nuclear Materials and Energy, 2021
Arcs, a source of dust particles and a localized erosion mechanism of the plasma-facing components, are found in all major fusion plasma devices. Measurements of arcs require diagnostics with high temporal and local resolution, which are not available at
V. Rohde, M. Balden, R. Neu
doaj   +1 more source

Carbon erosion and a:C-H layer formation at ASDEX Upgrade

, 2005
During the campaign 2002–2003 a carbon erosion and deposition experiment was performed in the lower divertor of ASDEX Upgrade. A complete divertor cross section with erosion sensitive markers, deposition monitors below the divertor and time resolved ...
Vainonen-Ahlgren, E., Vainonen-Ahlgren, Elizaveta, Likonen, J., Rohde, V., Likonen, Jari; id_orcid, Pütterich, T., Mayer, M., Neu, R., ASDEX Upgrade Team   +8 more
core   +1 more source

ERO and PIC simulations of gross and net erosion of tungsten in the outer strike-point region of ASDEX Upgrade

Nuclear Materials and Energy, 2017
We have modelled net and gross erosion of W in low-density l-mode plasmas in the low-field side strike point region of ASDEX Upgrade by ERO and Particle-in-Cell (PIC) simulations.
A. Hakola, M.I. Airila, N. Mellet, M. Groth, J. Karhunen, T. Kurki-Suonio, T. Makkonen, H. Sillanpää, G. Meisl, M. Oberkofler   +9 more
doaj   +1 more source

X-point radiator control and its dynamics in ASDEX Upgrade and JET deuterium–tritium discharges

Nuclear Fusion
Control of heat exhaust is essential for the operation of power producing fusion reactors. Here, we present results of heat exhaust feedback control experiments in JET and AUG.
T. Bosman, M. Bernert, L. Ceelen, B. Sieglin, J. Koenders, T. Ravensbergen, O. Kudlacek, P. Fox, D. Brida, H. Reimerdes, C. Lowry, M. Lennholm, L. Piron, H. Sun, P. Jacquet, K. Kirov, N. Vianello, C. Ashe, A. Parrott, D. Valcarcel, M. van Berkel, the ASDEX Upgrade Team, J. Contributors, the EUROfusion Tokamak Exploitation Team   +23 more
semanticscholar   +1 more source

NBI-driven Alfvénic modes at ASDEX Upgrade [PDF]

, 2012
A large variety of electromagnetic modes excited by NBI-generated energetic ions are observed in the early phase of many discharges at ASDEX Upgrade. In addition to the well-known reversed shear Alfven eigenmodes (RSAE) and the toroidal Alfven eigenmodes
Maraschek, M., Classen, I.G.J., M. García-Muñoz, Classen, I. G. J., Geiger, B., Curran, D., Igochine, V., Garcia-Munoz, M., McCarthy, P., Classen, I., ASDEX Upgrade Team, Lauber, P., Da Graca, S., Lauber, Ph.   +13 more
core   +1 more source