Understanding hollow cathode thrust production mechanisms
Grubisic, A.N. and Gabriel, S.B. (2009) Understanding hollow cathode thrust production mechanisms. In, 31st International Electric Propulsion Conference, Ann Arbor, USA, 20 - 24 Sep 2009. USA, Electric Rocket Propulsion Society27pp.
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This paper reviews some of the design considerations for improving hollow cathode thrust efficiency and investigates propellant acceleration mechanisms based on experimental testing of a T5, T6 and ¼ inch cathode. A pendulum micro-thrust-balance was built for the measurement of thrust levels in the T5, T6 cathodes while a hemispherical energy analyzer was used for ion energy measurements in the ¼ inch hollow cathode. The data suggest that the thrust mechanism of hollow cathodes is composed primarily of gas dynamic mechanisms, particularly as a result of an intense electron pressure at the cathode exit. At high currents and low flowrates magneto-hydro-dynamic (MHD) forces arising from the self-induced azimuthal magnetic field within the orifice become significant in the acceleration process
|Item Type:||Conference or Workshop Item (Paper)|
|Keywords:||hollow cathode, plasma, propulsion|
|Subjects:||U Military Science > U Military Science (General)
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Astronautics
|Date Deposited:||15 Feb 2010|
|Last Modified:||03 Aug 2012 08:29|
|Publisher:||Electric Rocket Propulsion Society|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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