Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session NP11: Poster Session V:
HED
ICF
MFE- Turbulence & Transport
9:30 AM - 12:30 PM
Wednesday, November 10, 2021
Room: Hall A
Abstract: NP11.00013 : The Dynamics of Strongly-Driven Electron Temperature Gradient Turbulence in a Slab*
Presenter:
William D Dorland
(University of Maryland, College Park)
Authors:
William D Dorland
(University of Maryland, College Park)
Ian G Abel
(IREAP, University of Maryland, College Park)
Rahul Gaur
(University of Maryland, College Park)
in the magnetic field, has been known to cause strong transport of
electron heat in tokamak discharges for many years, and has been
widely studied. Recent modelling of steady inter-ELM pedestals on
modern tokamaks (Guttenfelder, et al) has revealed that ETG turbulence
may, in fact, play a measureable role in determining the inter-ELM
profiles. Due to the extreme gradients in the pedestal, it is
possible for the turbulence to develop surprisingly
short correlation lengths along the magnetic field. In such a
situation, the effects of curvature may be sub-dominant.
We examine the nonlinear behavior of ETG turbulence in both unsheard
and sheared slab configurations by means of direct numerical
simulations. These simulations are carried out with the GX code
(Mandell, et al). We examine the flux-gradient relationship for slab
ETG turbulence and compare and contrast it with theories proposed for
core configurations, paying particular attention to the collisionality
dependence of the nonlinear turbulent state. Ultimately, we compare
with simulations in toroidal geometry and attempt to determine if the
short-correlation-length state is realized in more comprehensive
simulations.
*Supported by DOE/FES #DEFG0293ER54197 (theory) and #DESC0018429 (SciDAC MGK project).
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700