Accession Number : AD0284457

Title :   THERMIONIC CONVERTER RESEARCH

Corporate Author : MARQUARDT CORP VAN NUYS CALIF

Personal Author(s) : LAUBENSTEIN,R. ; BEYERMANN,W. ; CHANG,B.

Report Date : JUL 1962

Pagination or Media Count : 1

Abstract : I E TIFIERS: Thermionic converters. Two ethods were investigated for provi ing positive ions for neutralizing the electron space charge in a thermionic converter whic op rates at rel tively low t mperatures. Low temperature converters with e itter temperatures of 1200 C or low r are poten ially useful for operation with mall heat sources which burn ordinary fos il fuel in air. Data were obtained on arc mode operation of cesiu vapor diodes with molybdenum and with Philips B emitters in the temperature range 1000 to 1300 C. Power densities of about 0.3 to 1.0 watt per sq cm were obtained depending on emi er temperature and material. The presence of an auxiliary electrode in he form of a radiation shield surrounding the emi ter had a significant effect on diode perform nce with the Philips B emitter. The effects of the auxiliary electrode include an increased power output a d an increas d voltage at maximum power. ith the Philips B emitter the maximum power output occurred at a lower cesium pressure than with the molybdenum emitter. Materials which emit positive ions when heated in the range of 1000 to 1200 C were also udied. (Author)

Descriptors :   *DIODES, *IONIC CURRENT, *THERMIONIC EMISSION, CESIUM, DESIGN, ELECTRODES, HEATING, IONS, MOLYBDENUM, SPACE CHARGE, THERMIONIC CONVERTERS

Distribution Statement : APPROVED FOR PUBLIC RELEASE