Filamentary Tungsten Dispenser Cathodes: Thermionic Emitters for Vacuum Electronics and Gas Lasers
Filamentary tungsten dispenser cathodes represent a specialized class of thermionic emitters designed for reliable high-current electron emission in demanding vacuum and plasma environments. These devices combine the structural simplicity of a directly heated filament with the advanced emission properties of a porous tungsten matrix impregnated with barium-based compounds. Unlike pure tungsten filaments that require extremely…