Results 1 to 10 of about 2,363 (141)

Mitigation of divertor edge localised mode power loading by impurity seeding

Nuclear Fusion, 2023
One of the major challenges for the design of future thermonuclear reactors is the problem of power exhaust—the removal of heat fluxes deposited by plasma particles onto the plasma-facing components (PFCs) of the reactor wall. In order for the reactor to
M. Komm, M. Faitsch, S. Henderson, M. Bernert, D. Brida, O. Février, A. Järvinen, D. Silvagni, D. Tskhakaya, the ASDEX Upgrade Team, the EUROfusion MST1 Team   +10 more
doaj   +5 more sources

Modelling of edge localised modes and edge localised mode control [PDF]

Physics of Plasmas, 2015
Edge Localised Modes (ELMs) in ITER Q = 10 H-mode plasmas are likely to lead to large transient heat loads to the divertor. To avoid an ELM induced reduction of the divertor lifetime, the large ELM energy losses need to be controlled. In ITER, ELM control is foreseen using magnetic field perturbations created by in-vessel coils and the injection of ...
Shimpei Futatani, F L Waelbroeck, Alberto Loarte   +2 more
exaly   +2 more sources

Mitigation of edge localised modes with magnetic perturbations in ASDEX Upgrade [PDF]

Fusion Engineering and Design, 2013
Abstract The first stage of a significant enhancement of the ASDEX Upgrade experiment with in-vessel coils for non-axisymmetric magnetic perturbations is now operational. First experiments have shown that ELM mitigation can be achieved using various perturbation field configurations with toroidal mode numbers n = 1, 2, 4.
Louis Giannone, Eleonora Viezzer, Thomas Pütterich   +2 more
exaly   +4 more sources

Experimental conditions to suppress edge localised modes by magnetic perturbations in the ASDEX Upgrade tokamak [PDF]

Nuclear Fusion, 2018
Access conditions for full suppression of Edge Localised Modes (ELMs) by Magnetic Perturbations (MP) in low density high confinement mode (H-mode) plasmas are studied in the ASDEX Upgrade tokamak. The main empirical requirements for full ELM suppression in our experiments are: 1.
CARLOS Paz-Soldan, Raffi Nazikian, Eleonora Viezzer   +2 more
exaly   +7 more sources

Divertor heat fluxes and profiles during mitigated and unmitigated edge localised modes (ELMs) on the Mega Amp Spherical Tokamak (MAST) [PDF]

Journal of Nuclear Materials, 2013
13 pages, 7 ...
Andrew Kirk, A J Thornton
exaly   +3 more sources

Pedestal origin and extrapolation of high-density small edge-localised-modes peak parallel energy fluence in ITER and SPARC

Journal of Plasma Physics
Experimental analysis and simulations with the BOUT++ code show that small edge-localised modes (ELMs) in reactor-relevant high-density regimes originate in a region close to the separatrix and only marginally perturb the pedestal structure. The measured divertor peak parallel energy fluence ( ε
Renato Perillo, Charles Lasnier, Jose Boedo, Thomas Eich, Zeyu Li, Andreas Redl, Filipp Khabanov, Claudio Marini, Adam McLean, Fenton Glass, Timo Ravensbergen, Rabel Rizkallah, Dmitry Rudakov, Peter Traverso   +13 more
exaly   +3 more sources

Localisation of Dirac modes in gauge theories and Goldstone’s theorem at finite temperature

Journal of High Energy Physics, 2022
I discuss the possible effects of a finite density of localised near-zero Dirac modes in the chiral limit of gauge theories with N f degenerate fermions. I focus in particular on the fate of the massless quasi-particle excitations predicted by the finite-
Matteo Giordano
doaj   +1 more source

Probing non-linear MHD stability of the EDA H-mode in ASDEX Upgrade

Nuclear Fusion, 2023
Regimes of operation in tokamaks that are devoid of large edge localised modes have to be better understood to extrapolate their applicability to reactor-relevant devices.
A. Cathey, M. Hoelzl, L. Gil, M.G. Dunne, G.F. Harrer, G.T.A. Huijsmans, J. Kalis, K. Lackner, S.J.P. Pamela, E. Wolfrum, S. Günter, the JOREK Team, the ASDEX Upgrade Team, the EUROfusion MST1 Team   +13 more
doaj   +1 more source

Topological states between inversion symmetric atomic insulators

SciPost Physics, 2021
One of the hallmarks of topological insulators is the correspondence between the value of its bulk topological invariant and the number of topologically protected edge modes observed in a finite-sized sample.
Ana Silva, Jasper van Wezel
doaj   +1 more source

A stochastic model of edge-localized modes in magnetically confined plasmas [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2023
Magnetically confined plasmas are far from equilibrium and pose considerable challenges in statistical analysis. We discuss a non-perturbative statistical method, namely a time-dependent probability density function (PDF) approach that is potentially useful for analysing time-varying, large, or non-Gaussian fluctuations and bursty events associated ...
Kim, E-J, Hollerbach, R
openaire   +3 more sources