CATHODE PREHEATING UNIT Russian patent published in 2016 - IPC H01J23/04 H01J25/10 

FIELD: electronic equipment.

SUBSTANCE: invention relates to the field of electronic engineering. Cathode preheating unit for powerful klystron cathode contains several separate modules of a given size, each of which consists of a cathode block elementary cathode heater, holder, screen and are coaxially arranged drift tube klystron. Part of the cathode of each module to a height of (0.2-2.0) mm from the end opposite the working - emitting - a surface formed with a diameter greater than the diameter of the cathode module (0.2-10.0) mm. Warming cathode assembly is further provided with two cylinders - external and internal, with a given diameter, height - external, equal to the height of the cathode a separate module, or no more than two of its height, the inner - equal to the height of the cathode module, or - at least 0.5 of its height Each wall thickness (0.3-0.8) mm, the cylinders are arranged coaxially one inside the other in the working plane - emitting - cathode surface modules. Each individual cathode unit is additionally provided with a separate cylinder placed therein with a gap and secured by said holder part, with a separate barrel is diameter, which mate of cathode modules, height, at the height of the cathode module (1.0-5.0) mm, with a wall thickness equal to (0.2-0.6) mm, at the outer end face of each cylinder in the plane of the working - emitting - a surface formed monolithically fastening elements, each in the form of a circular segment with the length of its curve (4.0-8.0) the wall thickness of the individual cylinders in multiples of four and the individual cylinders with individual cathode modules are disposed between the inner and outer cylinders.

EFFECT: technical result - increase durability, power output and efficiency.

5 cl, 1 dwg, 1 tbl