ON COOLED ANODES IN CONTACT WITH LAMINAR ARC-HEATED FLOWS.
Interim technical rept. for 1 Feb 62-1 Aug 63,
DARTMOUTH COLL HANOVER N H
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This paper is concerned with the physics and operating characteristics of cooled anodes in contact with an archeated laminar plasma flow in a constant area duct. Various modes of anode behavior are identified and described. Some influences of gas type, flow rate, arc current, anode material and geometry are demonstrated. A theory is developed to explain the low-current mode of the anode characteristics. It is shown that the local current density on the anode surface is related approximately to the surfaces local bias relative to its electrically floating voltage. Anode current distribution data is presented the distribution is shown to be unstable above a transition bias voltage, with the current concentrating intensely on the edge of the anode toward the cathode. Author