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 CO08: Plasma Propulsion and Plasma Sources
2:00 PM–4:36 PM,
Monday, October 17, 2022
Room: 402 ABC
Chair: Benjamin Jorns, Univ. Michigan
Abstract: CO08.00007 : 2D axisymmetric Particle-In-Cell study of a hollow cathode and its near plume region*
3:12 PM–3:24 PM
Presenter:
Svetlana Selezneva
(General Electric Global Research Center)
Authors:
Svetlana Selezneva
(General Electric Global Research Center)
Willca Villafana
(Princeton Plasma Physics Laboratory)
David Smith
(General Electric Global Research Center)
Alexander V Khrabrov
(Princeton Plasma Physics Laboratory)
Igor D Kaganovich
(Princeton Plasma Physics Laboratory)
Dmytro Sydorenko
(University of Alberta)
Despite continuous progress, nonclassical processes such as the anomalous resistivity remain difficult to predict in hollow cathodes. Indeed, current modelings that are often based on a fluid or hybrid approach, rely on semi-empirical data and so need to be adjusted for each new configuration. Besides, the large mean free path downstream the orifice continues to challenge any fluid model.
In contrast, a Particle-In-Cell (PIC) method is well suited in this low-pressure regime and so it can help improve the current understanding of the plume dynamics that is highly dependent on the cathode orifice.
Therefore, in this work, we propose a fully kinetic axisymmetric two-dimensional study of a hollow cathode and its near plume region. The state-of-the-art open source code EDIPIC is used (https://github.com/PrincetonUniversity/EDIPIC-2D). Numerical results are consistent with analytical solutions for plasma expansion. We also explore the influence of an imposed magnetic field on the plasma expansion. Finally, we also investigate the impact of a small orifice obstructing plasma flow on the plume dynamics.
*The information, data, or work presented herein was funded in part by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under Award Number DE-AR0001107.This research used resources of the Princeton Collaborative Research Facility (PCRF)/Sandia Collaborative Research Facility (CRF), which is a collaborative research facility supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences.
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