Bulletin of the American Physical Society
74th Annual Gaseous Electronics Conference
Volume 66, Number 7
Monday–Friday, October 4–8, 2021;
Virtual: GEC Platform
Time Zone: Central Daylight Time, USA
Session TF13: Electric Propulsion
8:00 AM–10:00 AM,
Friday, October 8, 2021
Virtual Room: GEC platform
Chair: Gabe Xu, University of Alabama in Huntsville
Abstract: TF13.00005 : Recent performance improvement of a magnetic nozzle rf plasma thruster*
9:15 AM–9:30 AM
A simple thruster model have shown that the imparted thrust and the thruster efficiency can be enhanced by increasing the magnetic field strength and by enlarging the diameter of the source tube. Furthermore, the experiments have shown that the neutral injector also affects the density profile and the imparted thrust.
Here two different rf antennas exciting m = 0 and +1 modes are tested in about 10-cm-diameter rf plasma thruster. A better rf power coupling is obtained fom m=+1 mode case, which would be in helicon mode, while the larger thrust can be obtained for m=0 mode antenna. The difference between these two cases will be discussed in the presentation. Furthermore, the larger thrust can be obtained by injecting the neutral argon gas near the thruster exit; the thruster efficiency approaching twenty percent is successfully obtained for the rf power above a few kW, the propellant flow rate of 2 mg/s, and the peak magnetic field strength. of about several hundreds of Gauss.
* This work is partially supported by grant-in-aid for scientific research (Grants No. 19H00663) from the Japan Society for the Promotion of Science, Adaptable and Seamless Technology transfer Program from Japan Science and Technology Agency, and Casio Science Promotion Foundation.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
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