Results 41 to 50 of about 311,592 (233)
I-mode pedestal relaxation events in the Alcator C-Mod and ASDEX Upgrade tokamaks [PDF]
Nuclear Fusion, 2021 In some conditions, I-mode plasmas can feature pedestal relaxation events (PREs) that transiently enhance the energy reaching the divertor target plates.
D. Silvagni +15 more
semanticscholar +1 more source
Induced microwave scattering in the ITER edge transport barrier at ECRH and possibility of its modeling at ASDEX-Upgrade [PDF]
EPJ Web of Conferences, 2023 The induced scattering parametric decay instability of O-mode polarized microwaves leading to excitation of lower hybrid or electron plasma waves localized within a tokamak edge transport barrier is investigated.
Gusakov Evgeniy +2 more
doaj +1 more source
Nuclear Fusion, 2022 The properties of L-mode confinement have been investigated with a set of dedicated experiments in ASDEX Upgrade and with a related modelling activity with the transport code ASTRA and the quasi-linear turbulent transport model TGLF–SAT2, with boundary ...
C. Angioni +9 more
semanticscholar +1 more source
The separatrix operational space of ASDEX Upgrade due to interchange-drift-Alfvén turbulence
Nuclear Fusion, 2021 The efficient operation of a tokamak is limited by several constraints, such as the transition to high confinement or the density limits occurring in both confinement regimes. These particular boundaries of operation are derived in terms of a combination
T. Eich, P. Manz, the ASDEX Upgrade team
semanticscholar +1 more source
MHD simulations of small ELMs at low triangularity in ASDEX Upgrade [PDF]
Plasma Physics and Controlled Fusion, 2021 The development of small and no-ELM regimes for ITER is a high priority topic due to the risks associated with type-I ELMs. By considering non-linear extended magnetohydrodynamic (MHD) simulations of the ASDEX Upgrade tokamak with the JOREK code, we ...
A. Cathey +11 more
semanticscholar +1 more source
Pellet-fueled I-mode plasmas in ASDEX Upgrade
Nuclear Fusion, 2023 This letter reports on the efforts carried out at the ASDEX Upgrade tokamak to integrate I-mode plasmas with pellet fueling and to increase the I-mode Greenwald fraction $f_{\mathrm{GW}}$ , two important requirements for any DEMO operational scenario ...
D. Silvagni +12 more
doaj +1 more source
Fusion science and technology, 2022 This paper explores the application of Gaussian process tomography (GPT) to the bolometer diagnostic at ASDEX Upgrade. Previous work is extended by nonstationary Cartesian kernels and kernels that incorporate magnetic equilibrium information.
K. Moser +5 more
semanticscholar +1 more source
High-heat flux ball-pen probe head in ASDEX-Upgrade.
Review of Scientific Instruments, 2022 A new high heat flux ball-pen probe head installed on the midplane manipulator is currently being used in ASDEX-Upgrade (AUG). The probe was designed to withstand high heat fluxes making possible the investigation of the plasma edge under harsh ...
G. Grenfell +11 more
semanticscholar +1 more source
Journal of Physics: Conference Series, 2022 A promising method for the control of Edge Localized Modes (ELMs) in H-Mode tokamak plasmas is the application of Resonant Magnetic Perturbations (RMPs), where small helical field perturbations are introduced into the plasma via a set of external coils ...
V. Mitterauer +7 more
semanticscholar +1 more source
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 +5 more
doaj +1 more source