Power supply system for hot cathode pulse high voltage electron gun

Abstract

The invention discloses a power supply system for a hot cathode pulse high voltage electron gun. The power supply system comprises a charging power supply, a charging isolation resistor, a filament power supply network, a MarX pulse generator and a filament power supply. The charging power supply supplies power to a capacitor in the filament power supply network and a capacitor in the MarX pulse generator through the charging isolation resistor. The filament power supply network supplies power to a filament power supply. The filament power supply supplies power to an electron gun heating filament. A pulse high voltage end of the MarX pulse generator is connected with an electron gun cathode, and a ground end of the MarX pulse generator is connected with an electron gun anode. In the invention, the pulse high voltage part of the power supply system adopts the MarX pulse generator structure, the MarX pulse generation adopts solid state devices overall, a modular design is adopted, each module comprises multi-stage MarX circuit units, the plurality of modules are connected in series to achieve a total series requirement, the energy storage series can be adjusted conveniently, and a good practical value is gained.

Description

technical field [0001] The invention relates to the field of vacuum electronics and power supply, in particular to a power supply system of a hot cathode pulse high-voltage electron gun. Background technique [0002] Electron beam sources are widely used in the fields of microwave, accelerator, X-ray photography and electron beam irradiation. The electron gun is the core part of the electron beam source, which basically determines most of the parameters of the electron beam source. The hot cathode pulsed high-voltage electron gun is a kind of electron gun. It needs a certain heating power and a reasonable heating structure to heat the cathode. Generally, a filament is used for heating. The filament is connected between the cathode and the end of the filament; the heated cathode continuously gathers electrons on the surface. Under the action of the anode electric field, electrons escape to form an electron flow with a certain speed. Therefore, the normal operation of the ho...

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Problems solved by technology

[0005] In the application of hot cathode pulsed high-voltage electron guns, the use of MarX generators as the pulsed high-voltage source can improve the operating frequency, integration and controllability, but the power supply of the filament power supply requires a high-voltage isolation transformer, and even a low-power filament power supply requires a larger power supply. The volume and weight of the isolation transformer, which is not conducive to reducing the overall volume and weight of the system, and increasing the number of stages of the MarX generator requires changing the isolation transformer

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