STUDIES ON BASE NICKELS FOR OXIDE-COATED CATHODES
Abstract
WORK WAS CONTINUED ON CONTROLLED CHEMICAL ACTIVATION STUDIES USING CARBON AS AN ACTIVATOR. BY REPEATED APPLICATIONS AND REMOVALS OF CARBON FROM THE BASE NI OF AN OXIDE-COATED CATHODE, THE RATE OF REDUCTION OF THE OXIDE COATING WAS VARIED OVER THREE ORDERS OF MAGNITUDE. PRELIMINARY RESULTS INDICATE A QUANTITATIVE CORRELATION BETWEEN THE PULSE EMISSION AND THE SR EVOLUTION RATE. THESE CATHODES, BASED ON 0.2( AND 0.08( AL-NI ALLOYS, HAVE NOW BEEN OPERATED AT 1093 K IN EXCESS OF 13,000 HOURS. EMISSION LEVELS OF OVER 11 AMPS/SQ CM CONTINUE TO BE OBSERVED IN ALL CASES. A SERIES OF EXPERIMENTS ARE DESCRIBED WHICH INVESTIGATED THE EFFECT OF AN EXTENSIVE ATMOSPHERE OF BA VAPOR ON THE EMISSION PROPERTIESO OF OXIDE CATHODES. RESULTS ARE REPORTED OF THE ACTIVATION OF OXIDE CATHODES IN THE PRESENCE OF HEATED TI ANODES. THE RATE OF EVAPORATION OF MONOLAYER COVERAGES OF SR FROM TI IS REPORTED. OBSERVATIONS OF THE ELECTROLYTIC ACTIVATION OF OXIDE CATHODES BY CONTINUOUS CURRENT DRAIN ARE PRESENTED. A SERIES OF EXPERIMENTS ARE DESCRIBED WHICH RELATE TO POISONING AGENT OBSERVED IN CATHODE DEACTIVATION BY ANODE BOMBARDMENT TO THE BAKEOUT OF THE STRUCTURE. STUDIES OF THE TRANSIENTS OCCURRING UNDER LONGPULSE CONDITIONS ARE REPORTED
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1960
- Accession Number
- AD0250478
Entities
People
- D.e. Anderson
- W.g. Shepherd
Organizations
- University of Minnesota