Thermionic Properties of UC

Abstract

Thermionic emission measurements using pulse techniques have been obtained from UC-coated W filaments in the temperature range of 1200°–2100°K. From the slope and intercept of the Richardson plot, a value of φ=2.94 ev and A=33 amp/cm2 deg2 was indicated. There is evidence that the energy required for electrons to escape at low fields might be several tenths ev higher than the 2.94 ev value.