17 citations · 49 across the 9 of their papers we have counts for
9 papers
Electromagnetic pressure-gradient-driven instabilities with moderate high mode numbers in tokamak plasmas
Yann Narbutt, Ksenia Aleynikova, Matthias Borchardt +6
Pressure gradient-driven instabilities are investigated in tokamak plasmas using the global gyrokinetic code EUTERPE emphasizing the role of moderate high mode numbers. As the norm…
Nonlinear magnetohydrodynamic modeling of ideal ballooning modes in high- Wendelstein 7-X plasmas
Yao Zhou, K. Aleynikova, Chang Liu +1
We present nonlinear magnetohydrodynamic (MHD) simulations of high- Wendelstein 7-X plasmas using the stellarator extension of the M3D- code, building on the recent work th…
Enhanced performance in quasi-isodynamic max- stellarators with a turbulent particle pinch
G. G. Plunk, A. G. Goodman, P. Xanthopoulos +7
Recent stellarator reactor designs demonstrate mostly outward turbulent particle transport, which, without advanced fueling technology, inhibits the formation of density gradients…
Resonant theory of kinetic ballooning modes in general toroidal geometry
P. Mulholland, A. Zocco, M. C. L. Morren +4
The linear theory of the kinetic-ballooning-mode (KBM) instability is extended to capture a weakly-driven regime in general toroidal geometry where the destabilization is caused by…
Benign saturation of ideal ballooning instability in a high-performance stellarator
Yao Zhou, K. Aleynikova, Chang Liu +1
To examine the robustness of the designed 5% -limit for high-performance operation in the W7-X stellarator, we undertake nonlinear magnetohydrodynamic (MHD) simulations of press…
Nonlinear MHD modeling of soft limits in W7-AS
Rohan Ramasamy, Ksenia Aleynikova, Nikita Nikulsin +5
An important question for the outlook of stellarator reactors is their robustness against pressure driven modes, and the underlying mechanism behind experimentally observed soft $β…
Enhanced transport at high plasma pressure and sub-threshold kinetic ballooning modes in Wendelstein 7-X
P. Mulholland, K. Aleynikova, B. J. Faber +5
High-performance fusion plasmas, requiring high pressure , are not well-understood in stellarator-type experiments. Here, the effect of on ion-temperature-gradient-driven (I…
Nonlinear magnetohydrodynamic modeling of current-drive-induced sawtooth-like crashes in the W7-X stellarator
Yao Zhou, K. Aleynikova, N. M. Ferraro
Sawtooth-like core electron temperature crashes have been observed in W7-X experiments with electron cyclotron current drive. We present nonlinear single-fluid magnetohydrodynamic…
Non-linear Simulations of MHD Instabilities in Tokamaks Including Eddy Current Effects and Perspectives for the Extension to Halo Currents
M. Hoelzl, G. T. A. Huijsmans, P. Merkel +9
The dynamics of large scale plasma instabilities can strongly be influenced by the mutual interaction with currents flowing in conducting vessel structures. Especially eddy current…