Two-dimensional scanning high-energy X-ray irradiation system with electron linear accelerator

Abstract

The invention relates to an X-ray irradiation system with an electron linear accelerator as an electron beam source. The X-ray irradiation system is provided with a two-dimensional scanning deflection coil magnet ring, a super-large transmission type X-ray converter, and an extension irradiation protection room with a transverse repeated fold-back sample conveying mechanism, and can be used for carrying out automatic entering and exiting sample irradiation treatment continuously on articles which need ionizing radiation and irradiation sterilizing, insect-killing and disinfecting treatment such as Chinese patent medicine, food and flowers. The X-ray irradiation system has the advantages of being high in radiation conversion efficiency, radiation intensity and radiation penetration power, capable of irradiating automatic entering and exiting samples continuously, good in uniformity of irradiation dose and good in system radiation protection, and avoiding the environmental threat related to the radionuclide. The X-ray irradiation system can replace radioactive nucleus irradiation equipment widely adopted at present, get rid of dependence on a nuclear irradiation source from the irradiation industry and eliminate the potential threat of generating radioactive nuclear pollution to the environment.

Description

technical field [0001] The invention mainly relates to a new type of special equipment for ionizing radiation irradiation, in particular to a two-dimensional scanning high-energy X-ray irradiation system of an electron linear accelerator, which belongs to the technical field of ionizing radiation irradiation equipment. Background technique [0002] Utilizing the strong penetrability of ionizing radiation and the biological effect of radiation dose on organisms, human beings have widely used nuclear radiation technology since the last century with the slogan of peaceful use of nuclear energy, such as: chemical plastic modification, food preservation, articles Disinfection, sterilization and insecticide, research on the biological effects of irradiation, blood product processing (to prevent blood transfusion reactions) and other application fields have also achieved great social and economic benefits. Therefore, nuclear radiation sources for irradiation are widely used, espec...

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Problems solved by technology

But because it is different from the isotropic irradiation of radioactive nuclear gamma rays, and also has a larger radiation angle distribution than the X-rays produced by ordinary tens of kilovolts and hundreds of kilovolts of electrons, the main part of this high-energy X-ray photon is generated Almost all of them radiate in the direction close to the direction of the incident electron flight, and the irradiation angle is small, so it cannot be used simply and effectively for the irradiation of larger packaged samples

In addition, due to the strong penetrating ability of the high-energy X-rays generated, the radiation protection of the equipment is far more complicated than that of the electron linear accelerator. Due to the limitation of technological development, the current electron accelerator manufacturers have not yet made sufficient efforts in the research and development of the high-energy X-ray irradiation system. The technical input of the company has made it possible to replace the high-energy X-ray irradiation system of the high-activity Co60 nuclear irradiation station. The product has not yet appeared and reached the hands of users.

However, due to environmental protection requirements, all countries are restricting the import and export of nuclear radiation source devices. This situation will inevitably affect the promotion of radiation technology applications.

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