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: IT4.00067 : Plume Investigation of a Modular Hollow Cathode for ground testing of Plasma Thrusters
Presenter:
Mohamed M Ahmed
(University of Surrey)
Authors:
Mohamed M Ahmed
(University of Surrey)
Mansur Tisaev
(University of Surrey)
Silvia Masillo
(University of Surrey)
Burak Karadag
(University of Surrey)
Andrea Lucca Fabris
(University of Surrey)
Collaboration:
Mohamed Ahmed, Mansur Tisaev, Silvia Masilo, Burak Karadag, and Andrea Lucca Fabris
The modular hollow cathode has novel mechanical features that allow for direct contact between the emitter and heating element, resulting in higher thermal efficiency and better thermionic emission. The design includes an annular ceramic plate that separates the orifice plate from the keeper electrode, creating a high neutral density and potentially increasing the plasma density due to higher ionisation rates. To investigate this conjecture, experiments were conducted using invasive and non-invasive techniques in diode and triode mode. The experiments measured electron temperature, electron number density, and the plasma potential for a fixed distance as a function of mass flow rate at the keeper-anode and keeper-orifice gaps.
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