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 GP11: Poster Session III: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: DIII-D
Low Temperature Plasma
FUND: Dusty Plasmas; Plasma Sources
9:30 AM - 12:30 PM
Tuesday, October 18, 2022
Room: Exhibit Hall A and Online
Abstract: GP11.00069 : Numerical simulation of plasma sheaths inside the Hollow cathode discharge using the 2D-2V continuum-kinetic method*
Presenter:
Moises A Angulo Enriquez
(Lawrence Livermore National Laboratory)
Authors:
Moises A Angulo Enriquez
(Lawrence Livermore National Laboratory)
Michael D Campanell
(Lawrence Livermore Natl Lab)
Plasma sheaths inside a hollow cathode (HC) are investigated numerically using a continuum-kinetic method. This approach allows for a self-consistent model that tracks the evolution of the distribution functions for both ions and electrons without the use of fluid assumptions. Ionization, charge-exchange, and thermalization collisions have been implemented to study the effects the sheaths have on the plasma discharge. The primary motivation of this work is to establish the feasibility of non-classical sheaths that are found near emissive surfaces inside of a HC. These structures may have a direct impact on the performance and operation of the HC due to changes in the thermal transport, erosion due to ion bombardment, and thermionic emission due to plasma-induced surface heating. The resulting simulations will represent, to the authors’ best knowledge, the first cleanly-resolved sheath structures inside a HC using a collisional kinetic model.Â
*This work was performed under the auspices of the U.S. DoE by Lawrence Livermore National Laboratory under Contract No. DE-AC52-07NA27344. This research used resources of the National Energy Research Scientific Computing Center, a U.S. DoE Office of Science User Facility operated under Contract No. DE-AC02-05CH11231.
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