The group is concerned with both the development of technologies and the design and construction of technological equipment representing the basis for the building of electron optical devices operating in vacuum or ultrahigh vacuum conditions. These technologies include electron beam welding and micromachining, vacuum brazing, pulsed laser welding, the development and manufacturing of vacuum electric feedthroughs, etc. A new method of joining metals with brittle non-metal materials by brazing using ductile active brazing solders and the method of electron beam welding of metal materials with different physical properties have been developed. A function model of a desktop electron beam welding machine intended for welding of instrument parts has been realized.