Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session DR1: Plasma Surface Interaction I
8:00 AM–9:30 AM,
Thursday, October 12, 2023
Room: Michigan League, Hussey
Chair: Costel Biloiu, Applied Materials Inc
Abstract: DR1.00004 : GEC Student Excellence Award Finalist Presentation - Surface charge dynamics at the liquid/gas phase boundary of an argon bubble in water at varying conductivities.*
9:00 AM–9:15 AM
Presenter:
Nicholas L Sponsel
(North Carolina State University)
Authors:
Nicholas L Sponsel
(North Carolina State University)
Sophia Gershman
(Princeton Plasma Physics Laboratory)
Kristina Pattison
(North Carolina State University)
Jacob T Mast
(North Carolina State University)
Katharina Stapelmann
(North Carolina State University)
Collaboration:
This work was conducted at the Princeton Collaborative Research Facility supported by the U.S. Department of Energy through contract DE-AC02-09CH11466.
The bubble/electrode orientation is modeled as a capacitive dielectric barrier discharge (DBD). However, increasing the salinity of the solution results in an ever-increasing lossy dielectric. This impacts the capacity for surface charges to accumulate at the phase boundary and determines whether the bubble undergoes return-stroke emission, a characteristic of a DBD. In cases of deionized water, we demonstrate that for both nanosecond and microsecond pulses, the initial discharge emission decays while the pulse is still active, and only re-emerges at the fall of the pulse with the return-stroke current. The introduction of ions to the solution, on the other hand, results in the absence of such behavior, requiring increased electric fields to reach breakdown.
*N. Sponsel was supported by the Integrated University Program Graduate Fellowship.K. Stapelman and N. Sponsel supported by U.S. DOE award No. DE-SC0023235.Dr. S. Gershman is supported by U.S. DOE contract No. DE-AC02-09CH11466.
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