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: GP11.00063 : Anomalous electron decay in nanosecond repetitively pulsed discharges*
Presenter:
Alexey Shashurin
(Purdue University)
Authors:
Alexey Shashurin
(Purdue University)
Xingxing Wang
(Purdue University)
Adam R Patel
(Purdue University)
Collaboration:
The authors would like to thank N. A. Popov, M. N. Shneider, and S. Bane for valuable discussions.
In this work, coherent microwave scattering is used to study electron decay in the single-pulse and nanosecond repetitively pulsed discharges in a pin-to-pin configuration in atmospheric air. Measurements indicate that the electron decay times are substantially longer (1–2 orders of magnitude) than that which can be explained by attachment and dissociative recombination mechanisms using the reaction rates available in the literature. The observed discrepancy can be potentially attributed to an inapplicability of the rate coefficients available in the literature for conditions of ns-discharges and to additional ionization of gas after ns-pulse in collisions of electrons with excited gaseous species.
*This work was supported by the U.S. Department of Energy (Grant No. DE-SC0018156) and partially by the National Science Foundation (NSF) (Grant No. 1903415).
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