Cluster tip wavefront field emission cold cathode X-ray tube with counterpoint hole control strip

Abstract

The invention relates to a cluster tip wavefront field emission cold cathode X-ray tube with a counterpoint hole control sheet, which comprises an anode combination body, a cathode combination body and a vacuum packaging shell, wherein the cathode combination body comprises a control sheet with counterpoint holes at the front end part, an emission sheet with a cluster tip wavefront field emission cold cathode close behind the control sheet, an insulating washer and an emission sheet lead-out conductor. In the invention, the traditional X-ray tube cathode heating circuit is omitted, and the controllable current of the cold cathode X-ray tube is realized; the problems of large size and difficult manufacturing of a high-insulation isolating transformer supplying power for a cathode lamp filament when the traditional hot emission cathode technology is adopted are avoided, so that X-ray radiation equipment with ultrahigh working voltage becomes light and small, the cost is lowered, the use is convenient and flexible, the extensively used traditional radioactive nuclear irradiation source can be replaced, the dependence on the nuclear irradiation source is finally gotten rid of thoroughly, and the potential threat of producing radioactive nuclear pollution to the environment is eliminated.

Description

technical field [0001] The invention mainly relates to a field emission cold-cathode X-ray tube with a cluster tip array with an alignment hole control sheet, and belongs to the technical field of ionizing radiation irradiation equipment. Background technique [0002] Utilizing the strong penetration 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: food preservation, article disinfection, sterilization and insecticide , Irradiation biological effect research, blood product processing (to prevent blood transfusion reaction) and other various application fields have also achieved great social and economic benefits, and nuclear radiation sources for irradiation are therefore widely used. Due to the uncontrollable characteristics of nuclear radiation, nuclear radiation sources have been producing radiation t...

AI Technical Summary

Problems solved by technology

[0003] The technical defect of this kind of X-ray tube when it is used as irradiation is: the main axis of the ray exit direction is 90 degrees to the electron beam, and its effective irradiation angle must be less than 2 times the target angle, generally the maximum is about 40 degrees, which cannot be expanded. It is used in industry No problem for X-ray imaging, but for irradiation, the irradiation area is significantly reduced

However, in the subsequent actual development and application, it was found that the actual electron emission capability of the directional growth carbon nanotube sheet that can be provided at home and abroad is too small, and the service life is too short, and the emission stability is poor, so it cannot become the final application product.

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