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 YO08: Measurement and Diagnostic Techniques for Low Temperature Plasmas
9:30 AM–12:30 PM,
Friday, October 21, 2022
Room: 402 ABC
Chair: Sophia Gershman, PPPL
Abstract: YO08.00008 : Non-Invasive Laser Triggering for Investigation of Threshold Electrostatic Discharge Physics*
10:54 AM–11:06 AM
Presenter:
Sarah C Hinnegan
(Colorado School of Mines)
Authors:
Sarah C Hinnegan
(Colorado School of Mines)
Claudia A Schrama
(Colorado School of Mines)
Patrick Hunt
(Colorado School of Mines)
Philip D Flammer
(Colorado School of Mines)
Charles G Durfee
(Colorado School of Mines)
The triggering produces ESDs with a yield of >65%. While there is ~10ns jitter, co-recording of the current pulse will allow for time-resolved experimental diagnostics with ns timing resolution. Early results show a relatively short delay between triggering and the arc discharge (~100ns), indicating that collisional UV generation is a more likely source of secondary electrons than ion return current. Our experiment will be compared to our numerical models for plasma temperature and species evolution measurements in ESDs. Future experiments will be completed in a discharge chamber which allows for control of the gas composition and pressure.
*We acknowledge support for this work from Los Alamos National Lab.
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