Results 11 to 20 of about 34,895 (295)

Control of Transport-Barrier Relaxations by Resonant Magnetic Perturbations

Physical Review Letters, 2009
Transport-barrier relaxation oscillations in the presence of resonant magnetic perturbations are investigated using three-dimensional global fluid turbulence simulations from first principles at the edge of a tokamak. It is shown that resonant magnetic perturbations have a stabilizing effect on these relaxation oscillations and that this effect is due ...
Leconte, Michael, Beyer, P., Garbet, Xavier, Benkadda, S.   +3 more
openaire   +6 more sources

Suppression of Runaway Electrons by Resonant Magnetic Perturbations in TEXTOR Disruptions [PDF]

Physical Review Letters, 2008
The generation of runaway electrons in the international fusion experiment ITER disruptions can lead to severe damage at plasma facing components. Massive gas injection might inhibit the generation process, but the amount of gas needed can affect, e.g., vacuum systems.
Lehnen, M., Bozhenkov, S. A., Abdullaev, S. S., TEXTOR Team, Jakubowski, M. W.   +4 more
openaire   +7 more sources

Effect of resonant magnetic perturbations on particle confinement [PDF]

Nuclear Fusion, 2009
The effect of externally applied resonant magnetic perturbations (RMPs) on plasma particle transport is investigated based on two fluid equations. It is found that, depending on the frequency and direction of plasma rotation, the RMP of a moderate amplitude can either increase or decrease the plasma density gradient around the corresponding rational ...
Yu, Q., Günter, S.
openaire   +5 more sources

Mechanism of Edge Localized Mode Mitigation by Resonant Magnetic Perturbations [PDF]

Physical Review Letters, 2014
A possible mechanism of edge localized modes (ELMs) mitigation by resonant magnetic perturbations (RMPs) is proposed based on the results of nonlinear resistive magnetohydrodynamic modeling using the jorek code, realistic JET-like plasma parameters and an RMP spectrum of JET error-field correction coils (EFCC) with a main toroidal number n=2 were used ...
Becoulet, Marina, Orain, F., Huijsmans, G. T. A., Pamela, S., Cahyna, P., Hoelzl, M., Garbet, X., Franck, E., Sonnendrücker, E., Dif-Pradalier, Guilhem, Passeron, C., Latu, G., Morales, J., Nardon, E., Fil, Alexandre, Nkonga, B., Ratnani, A., Grandgirard, V.   +17 more
openaire   +6 more sources

Direct effects of the resonant magnetic perturbation on turbulent transport [PDF]

Nuclear Fusion, 2016
Abstract The effects of the resonant magnetic perturbations (RMPs) on the turbulent transport are analyzed in the framework of the test particle approach using a semi-analytical method. The model includes particle collisions. The influence of the RMPs on plasma confinement is determined as function turbulence parameters and of ...
Vlad, Madalina, Spineanu, Florin
openaire   +2 more sources

Plasma response impact on RMP divertor footprint modeling for KSTAR

Nuclear Materials and Energy, 2023
The striation pattern of heat loads on the divertor targets is determined by the plasma response to external resonant magnetic perturbations (RMPs) applied for suppression of edge localized modes (ELMs).
H. Frerichs, J. Van Blarcum, S.M. Yang, J-K. Park, N.C. Logan, Y. Feng, O. Schmitz   +6 more
doaj   +1 more source

Gas puff imaging measurements during resonant magnetic perturbations on the HL-2A tokamak

Nuclear Fusion, 2023
The gas puff imaging diagnostic is used for the investigation of the poloidal flow and turbulent fluctuations at the plasma edge and scrape-off layer (SOL) on the HL-2A tokamak.
J.B. Yuan, M. Xu, Y. Yu, B.D Yuan, L. Nie, Z.H. Wang, T.F. Sun, T. Wu, R. Ke, T. Long, S.B. Gong, X.Q. Ji, J.Q. Li, HL-2A team   +13 more
doaj   +1 more source

Three-Dimensional Propagation of Magnetohydrodynamic Waves in Solar Coronal Arcades [PDF]

, 2010
We numerically investigate the excitation and temporal evolution of oscillations in a two-dimensional coronal arcade by including the three-dimensional propagation of perturbations.
Arregui, Aschwanden, Halberstadt, I. Arregui, J. L. Ballester, J. Terradas, Oliver, Oliver, Poedts, Poedts, R. Oliver, Ruderman, S. Rial, Terradas, Terradas, Terradas, Tsubaki, Čadež, Čadež   +18 more
core   +1 more source

Access to stable, high pressure tokamak pedestals using local electron cyclotron current drive

Nuclear Fusion, 2023
Experiments on the DIII-D tokamak demonstrate that edge localized mode (ELM) stability can be manipulated using localized electron cyclotron current drive (ECCD) in conjunction with resonant magnetic perturbations (RMPs).
N.C. Logan, B.C. Lyons, M. Knolker, Q. Hu, T. Cote, P. Snyder   +5 more
doaj   +1 more source

On the validity of nonlinear Alfvén resonance in space plasmas [PDF]

, 2008
Aims. In the approximation of linear dissipative magnetohydrodynamics (MHD), it can be shown that driven MHD waves in magnetic plasmas with high Reynolds number exhibit a near resonant behaviour if the frequency of the wave becomes equal to the local ...
Arregui, Aschwanden, Aschwanden, Ballai, Ballai, Braginskii, C. T. M. Clack, Clack, DeForest, Erdélyi, Erdélyi, Erdélyi, Goedbloed, Goedbloed, Goossens, Goossens, Goossens, Goossens, I. Ballai, Kai, M. S. Ruderman, Mocanu, Nakariakov, Ofman, Poedts, Poedts, Robbrecht, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Sakurai, Terradas, Verth, Verth   +35 more
core   +3 more sources