Accession Number : AD0286542

Title :   THERMIONIC EMITTER MATERIALS RESEARCH PROGRAM

Descriptive Note : Annual tech. summary rept. 1 Jul 61-30 Jun 62.

Corporate Author : THERMO ELECTRON CORP WALTHAM MA

Personal Author(s) : KITRILAKIS, S.S. ; MEEKER, M.E. ; RASOR, N.S.

Report Date : 30 JUN 1962

Pagination or Media Count : 1

Abstract : Volume I of this report describes a program having the generation and interpretation of a reference set of thermionic converter output characteristics as its objective. Volume II is a compl te compendium of the reference set of data in its present form. In Volume I the experimental APPARATU AND TECHNIQUES ARE E CRIBED, AND THE EXPERIMENTAL MEASUREMENTS ARE ILLUSTRATED AND SUMMARIZED BY TYPICAL EXPERIMENTAL RESULTS. Emphasis was placed on suppressing perturbations by unknown variables, and on systematic survey of a broad range of parametric values. Emitter materials studied were niobium, tantalum, molybdenum, tungsten, rhenium and iridium. A method for systematic summary of the parameters observed to give maximum converter performance w s developed, and summary maps are presented for each material. Rhenium has exhibited the best over-all performance observed to date. (Author)

Descriptors :   *DIODES, *ELECTRON TUBES, *IRIDIUM, *MOLYBDENUM, *NIOBIUM, *RHENIUM, *TANTALUM, *THERMIONIC EMISSION, *TUNGSTEN, CESIUM ELECTRON TUBES, HIGH TEMPERATURE, METAL COATINGS, SURFACES, THERMIONIC CONVERTERS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE