Filament power supply device and low-energy electron accelerator

Abstract

A filament power supply device comprises a high-voltage power supply and a filament power supply, wherein the filament power supply and the filament are both suspended at the high-voltage output end of the high-voltage power supply; a sampling module arranged between the high-voltage power supply and the load and used for collecting the current load current; and a controller used for acquiring thecurrent load current and controlling the filament current of the filament power supply according to the current load current so as to enable the current load current to reach the target load current.The power required by the filament of the low-energy electron accelerator load electron gun can be provided, the response speed is high, the control efficiency is high, the output of the filament power supply device is stable and reliable, compared with the prior art, a generator does not need to be adopted for independent power supply, and the operation and maintenance cost is low. The inventionalso discloses a low-energy electron accelerator which has the above beneficial effects.

Description

technical field [0001] The present application relates to the field of electron accelerators, in particular to a filament power supply device and a low-energy electron accelerator. Background technique [0002] Industrial irradiation electron accelerator refers to the electron accelerator device mainly used in industrial production processes such as irradiating various materials, participating in chemical reactions and carrying out sterilization and disinfection. Among them, the most widely used are high-frequency high-voltage electron accelerators and resonant transformer-type electron accelerators. The beam current is the electrons emitted by the cathode of the electron gun heated by the electron gun cathode. And formed, the electron gun is installed on the top of the accelerating tube, at the highest potential of the accelerator. In order to supply power to the electron gun filament at high potential, two methods are usually adopted: one is to deliver energy to the heati...

AI Technical Summary

Problems solved by technology

In order to supply power to the electron gun filament at high potential, two methods are usually adopted: one is to deliver energy to the heating circuit of the electron gun at high potential through capacitive coupling. The disadvantage is that if the terminal voltage of the accelerator needs to change frequently with the irradiation task, Then when the accelerator runs at low voltage (low energy section), the voltage generated by electromagnetic coupling may be too low, resulting in insufficient heating current of the electron gun, which limits the maximum output current; the other is to use a generator for independent power supply, which can Not affected by high voltage, the disadvantage is that there are long-term high-speed running parts, which are vulnerable parts and need to be replaced regularly

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