Title :
A directly heated high emission density low-temperature cathode
Author :
Shikai Qi;Xiaoxia Wang;Jirun Luo;Mingwei Hu;Yun Li
Author_Institution :
University of Chinese Academy of Sciences, Beijing 100190, P.R. China
Abstract :
In order to enhance output power and prolong lifetime of the high-power continuous wave magnetron tubes, a novel Y2O3-Gd2O3-ZrO2 impregnate W sponge layer directly heated cathode is researched. The testing results show that the DC emission density of the cathode can reach 3.58A/cm2 at a temperature of 1750°C. Lifetime experiment results show that the thermionic emission current density is still above 1.5A/cm2 after 2600h operation.
Keywords :
"Cathodes","Heating","Temperature measurement","Electron tubes","Thermionic emission","Anodes","Temperature"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327793
