Title :
Correlation Between Emission Behavior and Surface Features of Scandate Cathodes
Author :
Wang, Yiman ; Wang, Jinshu ; Liu, Wei ; Li, Lili ; Wang, Yanchun ; Zhang, Xizhu
Author_Institution :
Sch. of Mater. Sci. & Eng., Beijing Univ. of Technol., Beijing
fDate :
5/1/2009 12:00:00 AM
Abstract :
Special emission behaviors have been observed historically and recently on scandate cathodes. For a better understanding of the phenomena, we investigated the correlation between emission properties of scandia-doped dispenser cathodes and their surface features. The influence of external electric fields on the semiconductor layer of the cathodes is suggested to be mainly responsible for the special emission characteristics.
Keywords :
cathodes; vacuum apparatus; vacuum microelectronics; cathode semiconductor layer; emission behavior; scandate cathodes; scandia-doped dispenser cathodes; surface features; vacuum electron devices; Barium; Cathodes; Current density; Electron devices; Materials science and technology; Powders; Reservoirs; Temperature; Thermionic emission; Tungsten; Scandate cathode; semiconductor model; surface analysis; thermionic emission; vacuum electron device (VED); work function;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2009.2015619
