Apparatus and method for generating different-energy X-ray and system for discriminating materials

Abstract

The method comprises: generating first, second, third and fourth pulse voltages; according to the first and second pulse voltage, generating a firs and a second electron beam respectively having a first beam loading and a second beam loading; according to the third and fourth pulse voltage, generating a first and a second microwaves respectively having a first power and second power; using the first and second microwaves to respectively accelerating the first and second beams in order to generate a first and a second accelerated beams; using the first and second accelerated beams to bomb the target in order to generating a first and a second X rays each having different energy.

Description

Technical field [0001] The invention relates to an electron linear accelerator used for radiation perspective imaging of large and medium-sized objects, and in particular to an electron linear accelerator device and method for generating X-rays with different energies, and a material recognition system, which can be used for large and medium-sized objects such as shipping and air containers. Materials for identification. Background technique [0002] Existing cargo inspection systems based on radiographic imaging generally allow the single energy rays to interact with the inspected object to detect the rays that penetrate the inspected object and obtain an image. This system can reflect the changes in the shape and mass thickness of the inspected object, but it cannot identify the material properties of the inspected object. [0003] With the increasing attention to global anti-terrorism, people have higher and higher inspection requirements for dangerous and contraband products,...

AI Technical Summary

Problems solved by technology

However, because there is only one original energy spectrum produced by a single high-energy X-ray, the two beams of rays with different energy spectra absorbed by a specific material will become almost the same after being attenuated by the object with a larger mass thickness. will no longer be able to distinguish the substance effective atomic number

If two ray sources are used to generate two beams of high-energy X-rays with different initial energy and energy spectrum to realize material identification, the system will be too complicated and expensive

[0005] Therefore, it has long been considered impractical to use dual-energy methods in the high-energy range for the inspection of large objects and the identification of materials of matter

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