DIAGNOSTIC STUDY OF THE FLUID TRANSPIRATION ARC
Final rept. 1 Apr 1964-31 Mar 1969
COLUMBIA UNIV NEW YORK ELECTRONICS RESEARCH LABS
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The report covers the investigation of the fluid transpiration arc in combination with the fluid convection cathode. Various arc configurations and operating techniques are described. Preliminary theoretical treatments of the interaction phenomena due to gas injection through a porous anode and through a tightly shrouded cathode nozzle with the arc discharge are carried out. Good agreement has been shown in some respects although several anomalies have been found attributed to deficiencies in the modelling. Several diagnostic techniques were developed during this investigation featuring transient plasma probes. These include a Hall magnetic probe, a thermocouple probe, a fiber optics probe and a Pitot tube probe. The cause of arc ignition damage to electrodes was investigated and corrected. The radiation characteristics of a combination arc source featuring a collinear geometry for the fluid transpiration anode and fluid convection cathode, were also investigated. Improved performance in conversion efficiency and luminous efficacy was demonstrated along with a favorable brightness profile.
- Test Facilities, Equipment and Methods
- Electricity and Magnetism
- Plasma Physics and Magnetohydrodynamics