Electron accelerator

Abstract

An electron accelerator comprises a steel cylinder, a high-frequency transformer, two lines of semi-circular corona rings which are arranged inside the steel cylinder, a high pressure electrode which is arranged on the corona rings, two pieces of high-frequency electrodes which are arranged outside the corona rings and the high pressure electrode, an electron gun which is used to produce and excite electrons with a filament, a vacuum accelerating tube which is arranged under the electron gun, a filament transformer which is electrically connected on the filament and is used to regulate filament voltage and an electron gun filament power supply system which is electrically connected on the filament transformer and is used to supply power to the electron gun, the electron gun filament power supply system comprises an electromotor which is arranged on the bottom of the steel cylinder and located under the corona rings, a centre rod whose one end portion is connected with an output end of the electromotor and an electric generator which is arranged inside the high pressure electrode and is electrically connected with the filament transformer, wherein the other end portion of the centre rod is connected with an input end of the electric generator and the centre rod is arranged inside an opening part of the semi-circular corona rings along the axial direction of the steel cylinder. The accelerator has the characteristics of simple structure, low cost, rapid response speed, stable supply voltage and convenient automatic control.

Description

technical field [0001] The invention relates to an electron accelerator. Background technique [0002] In the prior art, the electron accelerator is composed of the following components: a steel cylinder, a cold trap arranged on the top of the steel cylinder, a high-frequency transformer arranged on the top of the steel cylinder, a high-voltage electrode arranged below the high-frequency transformer, a core column, a Two rows of corona rings arranged on the core column symmetrically arranged on the center line of the cylinder, a silicon rectifier stack installed in the core column, two high-frequency electrodes connected with high-frequency transformers and arranged outside the two rows of corona rings, An electron gun used to excite electrons, a vacuum acceleration tube located below the electron gun, an electron gun power supply device used to supply power to the electron gun, a filament transformer used to adjust the voltage of the electron gun filament, and a high-freque...

AI Technical Summary

Problems solved by technology

[0004] Such a power supply method and device has complex structure, troublesome control, low stability and reliability, and limited adjustment range.

There are mainly the following problems: 1) When adjusting the filament voltage, it is necessary to change the angle of the two potentiometers for coarse adjustment and fine adjustment by adjusting the servo motor, and the response time is relatively slow, which cannot meet the requirements of fast tracking; 2) The filament current That is to say, it is difficult to maintain a strict single correspondence between the adjustment of the accelerator beam current and the adjustment of the servo motor, which brings a lot of inconvenience to the automatic tracking of the device under the beam; 3) When the accelerator works at a lower end voltage, the high The frequency voltage is also low, and the voltage input to the electron gun power supply circuit through coupling is also low. When the terminal voltage is low to a certain value, the voltage stabilizing component will not work. At this time, the heating current of the filament will change with the change of the accelerator terminal voltage.

And because the voltage input to the filament transformer is too low, the beam current cannot reach the rated value

Therefore, if the accelerator powered by this coupling method does not take other supplementary measures, the working range of its terminal voltage will be limited; 4) The brush of the potentiometer will be worn out, and the voltage stabilizing component is also easy to be damaged, so the failure rate is high and reliable. Low resistance, short service life

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