Method of assembling an emissive cathode for electron gun

The invention relates to a process for assembling a cathode for electron gun, which process is more particularly suitable for a so-called impregnated cathode. A process for assembling a cathode for electron gun comprising a body of emissive material, a cup into which the body of emissive material is inserted, a substantially cylindrical metal skirt, the said process comprising the following successive steps:insertion of the cup into one of the open ends of the metal skirt,welding of the cup to the skirt,crimping of the body/cup/skirt assembly by lateral squeezing at the level of the weld zone in such a way as to cause an indent-like deformation of the lateral face of the body.