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Model of the Plasma Potential Distribution in the Plume of a Hollow CathodeIn this paper we present results from a new model of the plasma potentials in the plume just downstream of the hollow cathode keeper. We examine the electron drift velocity as the hollow cathode plasma and neutral gas expand downstream of the keeper. If the drift velocity exceeds the thermal velocity a double layer potential structure develops that is the source of hot electrons. Ions are accelerated upstream through the double layer. The locations of the double layers are calculated using a simple model. It is shown that as the cathode gas flow increases, the location of the double layer moves farther downstream.
Document ID
20080008153
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Katz, Ira
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mikellides, Ioannis G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Goebel, Dan M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
July 12, 2004
Subject Category
Plasma Physics
Meeting Information
Meeting: Joint Propulsion Conference
Location: Fort Lauderdale, FL
Country: United States
Start Date: July 12, 2006
End Date: July 14, 2006
Distribution Limits
Public
Copyright
Other
Keywords
ion propulsion
hollow cathode
plasma generation

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