AN ELECTRON BEAM DEVICE AND A METHOD OF MANUFACTURING SAID ELECTRON BEAM DEVICE

摘要

The present invention relates to an electron beam device having a tubular body of elongate shape with an electron exit window extending in the longitudinal direction of the tubular body. Said tubular body is at least partly forming a vacuum chamber, said vacuum chamber comprising therein a cathode comprising a cathode housing (112) having an elongate shape, and at least one electron generating filament (120) and a control grid (114) both extending along the elongate shape of the cathode housing (112). The control grid (114) and the cathode housing (112) are attached to each other by attachments means (118). Free longitudinal end portions of either the control grid (114) or the cathode housing (112) are bent in a direction towards each other to form bulge-like shapes (126) for the formation of electron beam shaping electrodes. The invention is further comprising a method of manufacturing said electron beam device.