A Klystron Sintered Thermal Substructure

Abstract

The invention discloses a klystron sintered heater structure, which includes a heater, a sleeve and an insulating layer. The heater and the insulating layer are arranged inside the sleeve, and the heater surrounds to form a coiled incense-shaped spherical structure. The sleeve includes The top surface of the sleeve, the bottom surface of the sleeve and the side wall of the sleeve, the top surface of the sleeve and the bottom surface of the sleeve are also spherical structures, and the distance h between the upper ends of each ring of the heater and the top surface of the sleeve is equal; the heater (or Filament) is designed as a coiled incense spherical structure, and the upper end of the coiled incense spherical heater is tangent to the spherical surface A; the spherical surface A, the top surface of the sleeve, the bottom surface of the sleeve, the spherical surface of the cathode bottom surface and the spherical surface of the cathode emission surface are all concentric spherical surfaces , to ensure that during the preheating process of the heater, the entire cathode emitting surface can be heated evenly in a short period of time, effectively overcoming the temperature difference between the center and the edge of the cathode emitting surface, ensuring the uniform "activation" of the entire cathode surface, thereby reducing The heating power of the heater is improved, and the service life of the cathode is prolonged.

Description

technical field [0001] The invention relates to the technical field of high-power klystrons, in particular to a klystron sintered heat substructure. Background technique [0002] The heaters used in the early barium tungsten cathode klystrons are generally "bare wires", that is, the heaters are directly installed in the components without treatment, such as Figure 11 As shown, the shape of this kind of heat is mostly a coiled planar structure, and the whole heat is distributed on a plane. During the preheating process, the temperature of the center of the cathode is relatively high, and the temperature of the edge is relatively low. It takes a long time to achieve temperature equilibrium. Sometimes even after a long period of balance, the temperature at the edge of the cathode emitting surface is still 50-70°C lower than the temperature at the center, or even greater. [0003] The emission current of the thermionic emission cathode is closely related to the temperature of ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a klystron sintered heater structure to solve the problems of poor thermal shielding of the traditional klystron heater assembly structure and complicated installation of the assembly structure.

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