Jpn. J. Appl. Phys. 29 (1990) pp. L1507-L1508 |Next Article| |Table of Contents|
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Effect of Plasma Temperature on MPD Arcjet Cathode Surface Current Density Distribution
Department of Aerospace Engineering, Indian Institute of Science
(Received January 25, 1990; accepted for publication July 5, 1990)
The effect of plasma temperature on the radial current density distribution at the cathode longitudinal surface of an MPD arcjet is theoretically investigated by solving the electromagnetic equations for a typical geometry. It is found that the magnitude of the current density increases strongly with increasing temperature and beyond a certain temperature, a current density concentration develops at the cathode upstream edge. This temperature is species dependent and has values of 10,000 K and 8,500 K for argon and hydrogen respectively.
KEYWORDS:MPD arcjet, cathode surface current concentration, effect of plasma temperature, argon, hydrogen
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