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 CO08: Plasma Propulsion and Plasma Sources
2:00 PM–4:36 PM,
Monday, October 17, 2022
Room: 402 ABC
Chair: Benjamin Jorns, Univ. Michigan
Abstract: CO08.00012 : Inference of Plasma Wave Dispersion Relation from Transfer-Function Laser-Induced Fluorescence*
4:12 PM–4:24 PM
Presenter:
Parker J Roberts
(University of Michigan)
Authors:
Parker J Roberts
(University of Michigan)
Benjamin A Jorns
(University of Michigan)
We present a novel technique for determining the dispersion relation of low-frequency plasma waves propagating in a low-density plasma such as the Hall thruster plume. We apply laser-induced fluorescence to measure the velocity distribution of ions in the hollow cathode plume of this device with temporal resolution up to 100 kHz. Synchronized acquisitions spaced 1 mm apart allow for the statistical estimation of the wavenumber and phase at each frequency and velocity, providing the dispersion relation and growth rate of the measured waves. We use this technique to characterize rotational waves in the hollow cathode plume.
*This research was supported by a NASA Space Technology Graduate Research Opportunity (NSTGRO).
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