Results 1 to 10 of about 4,286 (293)

Blob velocities and sizes in the Alcator C-Mod scrape-off layer for ohmic and high confinement mode plasmas [PDF]

Nuclear Materials and Energy
An improved time delay estimation method is used to calculate the velocity of cross-field blob motion in the scrape-off layer of Alcator C-Mod for an ohmic and two high confinement (H-mode) plasmas; an edge localized mode free and an enhanced D-alpha H ...
A.D. Helgeland, J.M. Losada, J.L. Terry, O.E. Garcia   +3 more
doaj   +2 more sources

Plasma fluctuations in the scrape-off layer and at the divertor target in Alcator C-Mod and their relationship to divertor collisionality and density shoulder formation

Nuclear Materials and Energy, 2019
Experiments indicate that the formation of density shoulders in the far scrape-off layer (SOL) is associated with an increase in cross-field transport and the propagation of coherent structures of high density known as blobs.
A.Q. Kuang, B. LaBombard, D. Brunner, O.E. Garcia, R. Kube, A. Theodorsen   +5 more
doaj   +3 more sources

Influence of plasma background including neutrals on scrape-off layer filaments using 3D simulations

Nuclear Materials and Energy, 2017
This paper investigates the effect of the plasma background, including neutrals in a self-consistent way, on filaments in the scrape-off layer (SOL) of fusion devices.
D. Schwörer, N.R. Walkden, H. Leggate, B.D. Dudson, F. Militello, T. Downes, M.M. Turner   +6 more
doaj   +2 more sources

ICRF resonance cones in the low-density scrape-off-layer of ASDEX Upgrade

Nuclear Fusion
The ICRF slow wave is a potential carrier for parallel RF electric fields known to cause unwanted plasma-wall interactions in magnetic confinement fusion experiments.
Felix Paulus, Volodymyr Bobkov, Helmut Faugel, Helmut Fünfgelder, Oleksii Girka, Gustavo Grenfell, Roman Ochoukov, Wouter Tierens, Hartmut Zohm, the ASDEX Upgrade Team   +9 more
doaj   +2 more sources

Interchange turbulence in the TCV scrape-off layer

Plasma Physics and Controlled Fusion, 2005
Probe measurements of electrostatic plasma fluctuations in the scrape-off layer (SOL) of the TCV tokamak are compared with the results from two-dimensional interchange turbulence simulations. Excellent agreement is found for both the radial variation of statistical moments and temporal correlations, clearly indicating that turbulent transport in the ...
O. E. ̃Garcia, J. Horáček, R.A. Pitts, A. H. Nielsen, W. Fundamenski, J. P. Graves, V. Naulin, J. Juul Rasmussen   +7 more
openalex   +3 more sources

Blob interactions in 2D scrape-off layer simulations [PDF]

Physics of Plasmas, 2020
Interaction of coherent structures known as blobs in the scrape-off layer of magnetically confined plasmas is investigated. Isolated and interacting seeded blobs, as well as full plasma turbulence, are studied by two-dimensional numerical simulations.
G. Decristoforo, F. Militello, T. Nicholas, J. Omotani, C. Marsden, N. Walkden, O. E. Garcia   +6 more
openaire   +3 more sources

Broadening of the power fall-off length in a high density, high confinement H-mode regime in ASDEX Upgrade

Nuclear Materials and Energy, 2021
The search for scenarios in which tolerable power exhaust is combined with good confinement must involve high separatrix densities. We present here the first infrared thermography measurements at ASDEX Upgrade in a high density, high confinement H-mode ...
M. Faitsch, T. Eich, G.F. Harrer, E. Wolfrum, D. Brida, P. David, M. Griener, U. Stroth   +7 more
doaj   +1 more source

Impact of ion temperature anisotropy on 2D edge-plasma transport

Nuclear Materials and Energy, 2021
A model of ion temperature anisotropy for 2D plasma transport in the scrape-off layer (SOL) of tokamaks is described and implemented in the UEDGE fluid transport code.
M. Zhao, A.E. Jaervinen, I. Joseph, T.D. Rognlien   +3 more
doaj   +1 more source

ELM transport in the JET scrape-off layer [PDF]

Nuclear Fusion, 2007
This contribution summarizes a number of aspects of the experimental and modelling programme at JET aimed at improving the characterization and understanding of edge localized mode (ELM) transport in the scrape-off layer (SOL). Divertor target energy deposition asymmetries favouring the inner target for the ion B × ∇B drift directed towards the X-point
Pitts, R., Andrew, P., Arnoux, G., Eich, T., Fundamenski, W., Huber, A., Silva, C., Tskhakaya, D.   +7 more
openaire   +2 more sources

Turbulence in the near scrape-off layer towards the L-mode density limit in ASDEX-Upgrade

Nuclear Materials and Energy, 2022
The L-mode density limit in ASDEX Upgrade is investigated with focus on the scrape-off layer. We observe a chain of events that involves the collapse of the E×B outer shear layer (just outside the separatrix), widening of the electron pressure fall-off ...
G. Grenfell, P. Manz, G.D. Conway, T. Eich, J. Adamek, D. Brida, M. Komm, T. Nishizawa, M. Griener, B. Tal, U. Stroth   +10 more
doaj   +1 more source