Zobrazeno 1 - 10
of 1 385
pro vyhledávání: '"Hoppe, M"'
Autor:
Biwole, A. Tema, Porte, L., Fasoli, A., Figini, L., Decker, J., Hoppe, M., Cazabonne, J., Votta, L., Simonetto, A., Coda, S., Team, TCV
This paper describes the first Vertical Electron Cyclotron Emission (V-ECE) measurement of non-thermal electron distributions in the \textit{Tokamak \`a Configuration Variable}, TCV. These measurements were conducted in runaway electron scenarios and
Externí odkaz:
http://arxiv.org/abs/2407.18780
Autor:
Walkowiak, J., Hoppe, M., Ekmark, I., Jardin, A., Bielecki, J., Król, K., Savoye-Peysson, Y., Mazon, D., Dworak, D., Scholz, M.
Publikováno v:
Nucl. Fusion 64 036024 (2024)
The disruption and runaway electron analysis model code was extended to include tungsten impurities in disruption simulations with the aim of studying the runaway electron (RE) generation. This study investigates RE current sensitivity on the followi
Externí odkaz:
http://arxiv.org/abs/2404.14992
Autor:
Decker, J., Hoppe, M., Sheikh, U., Duval, B. P., Papp, G., Simons, L., Wijkamp, T., Cazabonne, J., Coda, S., Devlaminck, E., Ficker, O., Hellinga, R., Kumar, U., Savoye-Peysson, Y., Porte, L., Reux, C., Sommariva, C., Biwolé, A. Tema, Vincent, B., Votta, L., Team, the TCV, Team, the EUROfusion Tokamak Exploitation
Runaway electrons (REs) are a concern for tokamak fusion reactors from discharge startup to termination. A sudden localized loss of a multi-megaampere RE beam can inflict severe damage to the first wall. Should a disruption occur, the existence of a
Externí odkaz:
http://arxiv.org/abs/2404.09900
Autor:
Lee, Y., Aleynikov, P., de Vries, P. C., Kim, H. -T., Lee, J., Hoppe, M., Park, J. -K., Choi, G. J., Gwak, J., Na, Y. -S.
Dreicer generation is one of the main mechanisms of runaway electrons generation, in particular during tokamak startup. In fully ionized plasma it is described as a diffusive flow from the Maxwellian core into high energies under the effect of the el
Externí odkaz:
http://arxiv.org/abs/2310.16268
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
Publikováno v:
Journal of Plasma Physics, 88(3), 905880317 (2022)
Tokamak start-up is characterized by low electron densities and strong electric fields, in order to quickly raise the plasma current and temperature, allowing the plasma to fully ionize and magnetic flux surfaces to form. Such conditions are ideal fo
Externí odkaz:
http://arxiv.org/abs/2203.09900
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
Publikováno v:
Computer Physics Communications 268, November, 108098 (2021)
Avoidance of the harmful effects of runaway electrons (REs) in plasma-terminating disruptions is pivotal in the design of safety systems for magnetic fusion devices. Here, we describe a computationally efficient numerical tool, that allows for self-c
Externí odkaz:
http://arxiv.org/abs/2103.16457