Electron beam welding is special technique of welding.Electrons are accelerated in electron gun of electron welder. Electron bombardment is
source of heat.
Catalogue cards of polish electron beam welders (rar file) Electron beam in vacuum- the article from "Przegląd techniczny" 34/1987 r. (rar file)
In Poland is one institute, where is manufacturing of electron welders: Instytut Tele- i Radiotechniczny.