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: GP11.00051 : Effect of pressure on the fundamental parameters' spatio-temporal evolution in a µs pulsed-power glow discharge in low vacuum as studied via laser scattering techniques*
Presenter:
Gerardo Gamez
(Texas Tech University)
Authors:
Gerardo Gamez
(Texas Tech University)
Steven J Ray
(State University of New York Buffalo)
Kevin Finch
(Texas Tech University)
Here, a home-built LS system featuring a transmission-type triple grating spectrograph will be used to obtain spatiotemporally resolved maps of electron temperatures/densities, pertaining to a variety of GD operating conditions relevant to different applications, e.g. materials characterization via optical emission spectroscopy. A method for the spatial/spectral correction of the imaging system based on simulated Raman Scattering will be presented. Also, the instrument performance with different camera types will be discussed. Finally, the effects of pressure/RF power on the fundamental parameters will be examined as a function of spatial position and time along the plasma pulse. These studies will allow obtaining necessary insights into plasma underlying mechanisms, and serve as a baseline for future studies to elucidate the changes induced by coupling with external microwave radiation.
*National Science Foundation
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