Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session IT4: Poster Session I; Exhibition & Coffee (4:00pm-6:00pm)
4:00 PM,
Tuesday, October 10, 2023
Room: Michigan League, Ballroom
Abstract: IT4.00073 : Time-resolved Ion Energy Measurements Using a Retarding Potential Analyzer for Electric Propulsion Applications*
Presenter:
Austen Thomas
(Western Michigan University)
Authors:
Austen Thomas
(Western Michigan University)
Kristina M Lemmer
(Western Michigan University)
Collaborations:
Austen Thomas, Kristina Lemmer
The work presented demonstrates the capability of a standard RPA in conjunction with high-speed circuitry and data fusion techniques to produce time-resolved IEDFs at higher frequencies and beam potentials than have been previously investigated. Tested frequencies ranged between 20 – 80 kHz with 10 Vpp oscillations at a mean beam potential of 570 V. Additionally, measurements were conducted with several waveforms, functioning as the superimposed oscillation on a Kauffman-style gridded ion source. Utilizing data fusion techniques, we successfully reconstructed the time series data and produced time-resolved IEDFs at all frequency set points and waveforms. This investigation has demonstrated the HSRPA effectiveness at producing time-resolved measurements at conditions similar to those occurring in HETs.
*This work was partially supported by NASA through the Joint Advanced Propulsion Institute, a NASA Space Technology Research Institute, grant number 80NSSC21K1118.
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