Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NO07: Turbulence and Transport in Toroidal Devices
9:30 AM–12:18 PM,
Wednesday, October 19, 2022
Room: 401 ABC
Chair: Alessandro Marinoni, MIT
Abstract: NO07.00010 : Turbulence and Transport in Negative and Positive Triangularity*
11:18 AM–11:30 AM
Presenter:
M.J. Pueschel
(Dutch Institute for Fundamental Energy Research)
Authors:
M.J. Pueschel
(Dutch Institute for Fundamental Energy Research)
J.M. Duff
(University of Wisconsin-Madison)
J. Ball
(Ecole Polytechnique Fédérale de Lausanne)
S. Coda
(Ecole Polytechnique Fédérale de Lausanne)
In another set of TCV discharges, δ < 0 geometry results in lower transport. It is found that both the δ > 0 and the δ < 0 discharges are near-marginal to decorrelation of field lines: a moderate increase in β leads to a substantial boost in field-line stochasticity and ensuant zonal-flow erosion, resulting in a non-zonal transition and extreme profile stiffness. Adding resonant magnetic perturbations (RMPs) to the mixed ITG-TEM state in TCV – with a substantial level of zonal-flow activity – shows insensitivity to RMPs in terms of fluxes.
*This work has been carried out within the framework of the EUROfusion Consortium, funded by the E.U. via the Euratom Research and Training Programme (Grant Agreement No. 101052200 – EUROfusion). Views and opinions expressed are those of the authors only and do not necessarily reflect those of the E.U. or the European Commission. Neither the E.U. nor the European Commission can be held responsible for them.
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