Feedback control method and system for electronic accelerator irradiation system

Abstract

The invention discloses a feedback control method and system for an electronic accelerator irradiation system. The control method includes steps that (1), electrons are collected by an electron collector; (2), the aggregated power is amplified and adjusted to become a voltage signal of 0-10v; (3), an electron beam of 0-60mA outputted by an electron accelerator is proportionally adjusted to correspond to the 0-10v voltage signal; (4), the 0-10v voltage signal is transmitted to an industrial computer through a PLC AD analog module; and (5), the digital signal is calibrated and compared by the industrial computer, and equipment is controlled. The electronic collector of the control system is electrically connected with an electronic modulator through a power transmission line and a current limiting resistor, the electronic modulator is electrically connected with the PLC AD analog module through an optical isolator, and the PLC AD analog module is electrically connected with a PLC and theelectron accelerator. The method and the system are advantaged in that beam intensity can be accurately monitored and controlled, and stability and accuracy of the quality of irradiated products canbe greatly improved.

Description

technical field [0001] The invention relates to a control method and system of an electron accelerator, in particular to a feedback control method and system of an irradiation system of an electron accelerator. Background technique [0002] 1. Radiation processing refers to the transfer of the energy of electron beams produced by electron accelerators (0.2MeV~10MeV) or gamma rays produced by radioactive isotopes (Cs-137 or Co-60) to irradiated substances. On the irradiated matter, ionization and excitation are generated to release orbital electrons to form free radicals. By controlling the radiation conditions, the physical properties and chemical composition of the irradiated material can be changed to form a new material that people need, or the organisms (microorganisms, etc.) can be irreversibly lost and damaged, to achieve goals that people want. This new processing technology is called radiation processing technology. For example, grafting, polymerization, fission o...

AI Technical Summary

Problems solved by technology

[0009] The electron beam current signal at the high-voltage end in the power supply steel barrel is sampled by the electron beam current sampling circuit to obtain a downlink voltage signal, and the electron beam current signal is processed and output. This traditional circuit will cause a large circuit loss. The output beam current value is used as the output value of the electron beam current. The beam current value obtained in this way is extremely unstable. Because of the flashover and temperature changes in the high voltage, the output beam current value is prone to deviation or cause signal distortion. Drift has a great impact on the stability and accuracy of irradiated products, and has restricted the development of high precision in the entire industry to a certain extent.

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