Detail Information

Study of dispenser cathode development for terahertz vacuum devices application

International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

Barik R.K., Tanwar A.K., Baek I.K., Eom K., Bera A., Sattorov M.A., Min S.H., Kwon O.J., Park G.-S.


A Scandium oxide doped tungsten nano-powder for using in high current density thermionic cathode is believed to play a dominant role to improve emission capability. The nano-powder was prepared using sol-gel method by dissolving the blue tungsten and scandium nitrate into the solution. The result shows average particle diameter ∼50 nm, uniform grain size, spherical morphology, uniform phase and homogeneous mixing Sc2O3 doped W nano-powder. Dispenser cathodes will be prepared using this powder and expected excellent emission current density more than 100 A/cm2 which can be used for THz vacuum electron devices. © 2012 IEEE.