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 PP11: Poster Session VI: In-Person, Hall A (2:00-3:30pm) and Virtual Poster Presentations (3:45-5:00pm)
MFE: Diagnostics; Edge and Pedestal; Stability; Heating; Transport, Turbulence
ASTRO: Astrophysical Plasma
2:00 PM - 5:00 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: PP11.00062 : Time-domain modeling of plasma sheaths on RF antenna surfaces*
Presenter:
Thomas G Jenkins
(Tech-X Corporation)
Authors:
Thomas G Jenkins
(Tech-X Corporation)
David N Smithe
(Tech-X Corp)
James R Myra
(Lodestar Research Corporation)
J. C Wright
(MIT)
Atul Kumar
(Oak Ridge National Lab)
Matthew J Poulos
(Princeton Plasma Physics Laboratory)
We demonstrate that the new sheath model reproduces published benchmarks [2], and enables the study both of nonlinear sheath behaviors on realistic 3D RF antenna structures, and of the associated impurity production via sputtering from these structures. For the latter study, we discuss initial efforts to couple Vorpal with the GITR (Global Impurity TRansport) code and simulate impurity production in Alcator C-Mod discharges. Longer-term efforts will focus on developing the predictive capability of the coupled codes for impurity production modeling and mitigation.
[1] Myra, PoP 24, 072507 (2017), [2] Kohno & Myra, CPC 220, 129 (2017)
*Funded by U.S. Department of Energy OFES/ASCR via the SciDAC Center for Integrated Simulation of Fusion Relevant RF Actuators (DE-SC0018319).
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