Title :
17.6: Evaporation behavior of scandia doped dispenser cathode
Author :
Wang, Jinshu ; Li, Lili ; Zhao, Lei ; Wang, Yiman ; Liu, Wei ; Zhang, Xizhu
Author_Institution :
Sch. of Mater. Sci. & Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
The evaporated substance of Scandia doped impregnated dispenser cathode is mainly composed of Ba and BaO and Ba evaporated more easily than BaO from the surface of the scandate cathode, which is consistent with the result of impregnated Ba-W cathode. However, the evaporation rate of total substance and the evaporated amount of Ba and BaO from the scandate dispenser cathode are lower than those from impregnated Ba-W and M -type cathodes.
Keywords :
cathodes; Ba; BaO; Scandia doped dispenser cathode; Scandia doped impregnated dispenser cathode; evaporation behavior; scandate cathode; Cathodes; Current density; Detectors; Instruments; Materials science and technology; Oscillators; Powders; Temperature dependence; Temperature measurement; Tungsten; Scandia doped tungsten matrix; dispenser cathode; evaporation behavior; temperature dependent;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2010 IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-7098-3
DOI :
10.1109/IVELEC.2010.5503440
