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: GP11.00094 : Impedance Probe Measurements in Dusty Plasmas*
Presenter:
Brandon D Doyle
(Auburn University)
Authors:
Brandon D Doyle
(Auburn University)
Uwe Konopka
(Auburn University)
Transmission-type (S21) impedance probes offer some advantages over reflection-type (S11) probes in that they are separately sensitive to plasma near the probes and plasma farther away, and because the same probe tips may be used for double Langmuir probe measurements.
We present circuit simulations of such probes to investigate the interaction between probe tips, grounded chamber walls, bulk plasma, and plasma sheathes. We approximate the continuous plasma as a series of discrete circuit elements with values determined from a single-fluid plasma model. The results of these simulations are compared to experiments performed in a low temperature plasma.
*This work is supported with funding from the NASA/JPL, the US Dept. of Energy and the NSF-EPSCoR Program
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