The complete refuelling of the plasma density loss (pump-out) caused by mitigation of edge localised modes (ELMs) is demonstrated on the ASDEX Upgrade tokamak. The plasma is refuelled by injection of frozen deuterium pellets and ELMs are mitigated by external resonant magnetic perturbations (RMPs). In this experiment relevant dimensionless parameters, such as relative pellet size, relative RMP amplitude and pedestal collisionality are kept at the ITER like values. Refuelling of density pump out of the size of requires a factor of two increase of nominal fuelling rate. Energy confinement and pedestal temperatures are not restored to pre-RMP values by pellet refuelling.

Valovic, M., Lang, P., Kirk, A., Suttrop, W., Cavedon, M., Cseh, G., et al. (2016). Pellet refuelling of particle loss due to ELM mitigation with RMPs in the ASDEX Upgrade tokamak at low collisionality. NUCLEAR FUSION, 56(6) [10.1088/0029-5515/56/6/066009].

Pellet refuelling of particle loss due to ELM mitigation with RMPs in the ASDEX Upgrade tokamak at low collisionality

Cavedon M.;
2016

Abstract

The complete refuelling of the plasma density loss (pump-out) caused by mitigation of edge localised modes (ELMs) is demonstrated on the ASDEX Upgrade tokamak. The plasma is refuelled by injection of frozen deuterium pellets and ELMs are mitigated by external resonant magnetic perturbations (RMPs). In this experiment relevant dimensionless parameters, such as relative pellet size, relative RMP amplitude and pedestal collisionality are kept at the ITER like values. Refuelling of density pump out of the size of requires a factor of two increase of nominal fuelling rate. Energy confinement and pedestal temperatures are not restored to pre-RMP values by pellet refuelling.
Articolo in rivista - Articolo scientifico
ELM control; pellet fuelling; plasma density;
English
Valovic, M., Lang, P., Kirk, A., Suttrop, W., Cavedon, M., Cseh, G., et al. (2016). Pellet refuelling of particle loss due to ELM mitigation with RMPs in the ASDEX Upgrade tokamak at low collisionality. NUCLEAR FUSION, 56(6) [10.1088/0029-5515/56/6/066009].
Valovic, M; Lang, P; Kirk, A; Suttrop, W; Cavedon, M; Cseh, G; Dunne, M; Fischer, L; Garzotti, L; Guimarais, L; Kocsis, G; Mlynek, A; Plockl, B; Scannell, R; Szepesi, T; Tardini, G; Thornton, A; Viezzer, E; Wolfrum, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/354889
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