Zobrazeno 1 - 10
of 202
pro vyhledávání: '"Pusztai, I"'
Autoresonant phase-locking of the plasma wakefield to the beat frequency of two driving lasers offers advantages over conventional wakefield acceleration methods, since it requires less demanding laser parameters and is robust to variations in the ta
Externí odkaz:
http://arxiv.org/abs/2402.06534
Pellet injection is used for fuelling and controlling discharges in tokamaks, and it is foreseen in ITER. During pellet injection, a movement of the ablated material towards the low-field side (or outward major radius direction) occurs because of the
Externí odkaz:
http://arxiv.org/abs/2301.12911
Autor:
Tinguely, R. A., Pusztai, I., Izzo, V. A., S'"arkimäki, K., Fülöp, T., Garnier, D. T., Granetz, R. S., Hoppe, M., Paz-Soldan, C., Sundström, A., Sweeney, R.
In [V.A. Izzo et al 2022 Nucl. Fusion 62 096029], state-of-the-art modeling of thermal and current quench (CQ) MHD coupled with a self-consistent evolution of runaway electron (RE) generation and transport showed that a non-axisymmetric (n = 1) in-ve
Externí odkaz:
http://arxiv.org/abs/2301.01435
Understanding generation and mitigation of runaway electrons in disruptions is important for the safe operation of future tokamaks. In this paper we investigate runaway dynamics in reactor-scale spherical tokamaks. We study both the severity of runaw
Externí odkaz:
http://arxiv.org/abs/2208.02117
Autor:
Izzo, V. A., Pusztai, I., Särkimäki, K., Sundström, A., Garnier, D., Weisberg, D., Tinguely, R. A., Paz-Soldan, C., Granetz, R. S., Sweeney, R.
The operation of a 3D coil--passively driven by the current quench loop voltage--for the deconfinement of runaway electrons is modeled for disruption scenarios in the SPARC and DIII-D tokamaks. Nonlinear MHD modeling is carried out with the NIMROD co
Externí odkaz:
http://arxiv.org/abs/2207.12450
An effective disruption mitigation system in a tokamak reactor should limit the exposure of the wall to localized heat losses and to the impact of high current runaway electron beams, and avoid excessive forces on the structure. We evaluate with resp
Externí odkaz:
http://arxiv.org/abs/2201.10279
Autor:
Tinguely, RA, Izzo, VA, Garnier, DT, Sundström, A, Särkimäki, K, Embréus, O, Fülöp, T, Granetz, RS, Hoppe, M, Pusztai, I, Sweeney, R
The potential formation of multi-mega-ampere beams of relativistic "runaway" electrons (REs) during sudden terminations of tokamak plasmas poses a significant challenge to the tokamak's development as a fusion energy source. Here, we use state-of-the
Externí odkaz:
http://arxiv.org/abs/2110.10598
Autor:
Hoppe, M., Hesslow, L., Embreus, O., Unnerfelt, L., Papp, G., Pusztai, I., Fülöp, T., Lexell, O., Lunt, T., Macusova, E., McCarthy, P. J., Pautasso, G., Pokol, G. I., Por, G., Svensson, P., team, the ASDEX Upgrade, team, the EUROfusion MST1
Publikováno v:
Journal of Plasma Physics, Volume 87, Issue 1, February 2021, 855870102
Synchrotron radiation images from runaway electrons (REs) in an ASDEX Upgrade discharge disrupted by argon injection are analyzed using the synchrotron diagnostic tool SOFT and coupled fluid-kinetic simulations. We show that the evolution of the runa
Externí odkaz:
http://arxiv.org/abs/2005.14593
A runaway avalanche can result in a conversion of the initial plasma current into a relativistic electron beam in high current tokamak disruptions. We investigate the effect of massive material injection of deuterium-noble gas mixtures on the coupled
Externí odkaz:
http://arxiv.org/abs/2004.12861
In toroidal magnetic confinement devices, such as tokamaks and stellarators, neoclassical transport is usually an order of magnitude larger than its classical counterpart. However, when a high-collisionality species is present in a stellarator optimi
Externí odkaz:
http://arxiv.org/abs/1903.12511