Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session YP11: Poster Session IX: The crossover between high-energy-density plasmas and ultracold neutral plasmas ; Supplemental; Post-Deadline Abstracts (9:30am-12:30pm)
Friday, November 9, 2018
OCC
Room: Exhibit Hall A1&A
Abstract ID: BAPS.2018.DPP.YP11.45
Abstract: YP11.00045 : Heat transport and core turbulence measurements on the optimized stellarator Wendelstein 7-X
Presenter:
G. M. Weir
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
Authors:
G. M. Weir
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
J. H. E. Proll
(Eindhoven University of Technology, Eindhoven, Netherlands)
T. Windisch
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
A. v. Stechow
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
S. Bozhenkov
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
A. Dinklage
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
E. Edlund
(SUNY Cortland, N.Y. 13045, USA)
T. Estrada
(Laboratorio Nacional de Fusion, CIEMAT, E-28040 Madrid, Spain)
G. Fuchert
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
O. Grulke
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
M. Hirsch
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
U. Hoefel
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
S. Kwak
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
A. Langenberg
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
N. Pablant
(Princeton Plasma Physics Laboratory, Princeton, N.J., 08536 USA)
E. Pasch
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
M. Porkolab
(Massachusetts Institute of Technology Plasma Science and Fusion Center, Cambridge, MA. 02139, USA)
E. Scott
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
J. Smoniewski
(HSX Plasma Laboratory, University of Wisconsin-Madison, Madison, WI. 53706 USA)
T. Stange
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
F. Warmer
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
P. Xanthopoulos
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
D. Zhang
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
Z. Huang
(Massachusetts Institute of Technology Plasma Science and Fusion Center, Cambridge, MA. 02139, USA, Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
T. Klinger
(Max-Planck-Institute for Plasma Physics, D-17491 Greifswald, Germany)
The optimized stellarator Wendelstein 7-X (W7-X) is designed to have an approximately quasi-isodynamic (QI) magnetic configuration with reduced neoclassical transport compared to a classical stellarator, and turbulent transport is expected to be a significant source of heat transport across the plasma minor radius. The Ion Temperature Gradient (ITG) and Trapped Electron Mode (TEM) are the dominant turbulence channels in low beta W7-X plasmas, and gyrokinetic modelling indicates two major differences between ITG/TEMs in W7-X and previous tokamak and stellarator experiments. The ITG mode is predicted to be highly localized along a helical band in W7-X, causing a reduction of the associated turbulence, and the nearly QI configuration of W7-X is predicted to be resilient to collisionless TEMs. In this contribution, the electron heat transport is compared to neoclassical predictions, and the stiffness in the electron heat transport is compared to TEM/ITG mode driven turbulence in two magnetic configurations of W7-X: one nearly QI configuration as well as a configuration with deliberately reduced QI. Additionally, electron temperature and plasma density fluctuations are compared to linear and nonlinear gyrokinetic calculations to assess the stabilization of TEM turbulence in W7-X.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.YP11.45
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