Electron Beam Guns for High Intensity Linear Accelerators and Technological Purposes

The design and performance characteristics of electron beam guns are described. Three electrode electron optical system with lantanum hexaboride cathode and electromagnetic lense ensures continuous beam current from 1 mA to 2 A and small (near 1 mm) spot diameter at the gun output. The original design of cathode assembly with indirect heating permits in-creased working period of guns without taking apart. These guns were used as injector for 10 MeV electron linear accel-erator and for electron beam technology in industry such as welding and surface hardening of important components, ma-terials evaporation. 1