Numerical simulations of the thermionic electron gun for electron-beam welding and micromachining Jánský, Pavel ; Zlámal, Jakub ; Lencová, Bohumila ; Zobač, Martin ; Vlček, Ivan ; Radlička, Tomáš Abstract Publication: Vacuum Pub Date: September 2009 DOI: 10.1016/j.vacuum.2009.07.007 Bibcode: 2009Vacuu..84..357J