Electron and Ion Emission from Polycrystalline Surfaces of Nb, Mo, Ta, W, Re, Os, and Ir in Cesium Vapor

Full temperature range electron and ion emission data from seven refractory metals in cesium vapor are reported in the range of cesium arrival flux from 1012 to 1018 atoms/cm2·sec, as determined from measurements between 1013 and 1017 atoms/cm2·sec. Electron-emission S curves and cesium surface ionization critical temperature envelopes are shown.