Physics – Plasma Physics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982phdt........34s&link_type=abstract
Ph.D. Thesis, 1 Dec. 1981 - 1 Dec. 1982 Colorado State Univ., Fort Collins. Dept. of Mechanical Engineering.
Physics
Plasma Physics
Electron Emission, Hollow Cathodes, Ion Propulsion, Mathematical Models, Orifices, Plasma Physics, Arc Discharges, Internal Pressure, Mass Flow, Mercury Ion Engines
Scientific paper
A quartz hollow tube cathode was used to determine the operating conditions within a mercury orificed hollow cathode. Insert temperature profiles, cathode current distributions, plasma properties profile, and internal pressure-mass flow rate results are summarized and used in a phenomenological model which qualitatively describes electron emission and plasma production processes taking place within the cathode. By defining an idealized ion production region within which most of the plasma processes are concentrated, this model is expressed analytically as a simple set of equations which relate cathode dimensions and specifiable operating conditions, such as mass flow rate and discharge current, to such important parameters as emission surface temperature and internal plasma properties. Key aspects of the model are examined.
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