Power supply device for grid-control electron gun, electron gun system and power supply method

Abstract

The invention relates to a power supply device for a grid-control electron gun, an electron gun system and a power supply method. The power supply device comprises a first outer-layer structure whichis a rotary conductor, wherein one end of the first outer-layer structure is provided with a grid interface, the other end is connected with a first power input interface, and a microwave input interface is arranged between the two ends; a first inner-layer structure which is a rotary conductor, wherein one end of the first inner-layer structure is provided with a cathode interface, and the otherend is connected with a second power input interface; and a second inner layer structure which is a rotary conductor, wherein one end is provided with a filament interface, and the other end is connected with a third power supply input interface. The first outer layer structure, the first inner layer structure and the second inner layer structure are coaxially arranged, the second inner layer structure is located on the innermost layer, and the first outer layer structure is arranged outside the first inner layer structure at intervals. The invention provides a dual-mode power supply device which meets the requirement of the electronic gun of the type for power supply during direct-current microwave use, the electronic gun system is designed and optimized, and a high-frequency beam bunch with higher quality can be obtained.

Description

technical field [0001] The invention relates to the technical field of electron linear accelerators, in particular to a power supply device for a gate-controlled electron gun, an electron gun system and a power supply method. Background technique [0002] A superconducting electron linear accelerator with high average current intensity, high average power and stable operation has very important applications in the fields of medicine and radiation. Because of the high atomic number, medical isotopes are mostly prepared by the reactor method. The early accelerators produced medical isotopes because the average beam current intensity and beam energy were low, resulting in extremely low production efficiency of isotopes and poor economic benefits, so they could not be put into industrial production. . In recent years, with the continuous development of superconducting technology, superconducting electron linear accelerators have made great progress. The high beam energy of this...

AI Technical Summary

Problems solved by technology

[0004]At present, in the field of microwave gate control, there are mainly the following problems: when microwaves are fed into the space between the cathode and grids, the structure will be closed, how to transmit microwaves Connecting each DC voltage to the inside of the cathode requires a detailed and reasonable plan

[0005] In addition, the coaxial power supply structure of the cathode of the electron gun may not be a standard 50 ohm device, which does not meet the matching conditions. It is necessary to design a specific transmission structure to complete impedance matching to ensure microwave Ability to efficiently feed between cathode and grid from a specific microwave power source

Images