Effective focus size regulating device and method for double-cylindrical electron linear accelerator

Abstract

The invention discloses an effective focus size regulating device and method for a double-cylindrical electron linear accelerator. The effective focus size regulating device is used for improving the industrial CT space resolution of the accelerator. The effective focus size regulating device comprises a fixing sleeve, a first cylindrical piece, a second cylindrical piece and a regulating device, the fixing sleeve comprises a square hole, both the first and second cylindrical pieces are mounted in the square hole, the square hole is used for fixing the first and second cylindrical pieces, each of the first and second cylindrical pieces comprises an arc-shaped surface, the arc-shaped surface of the first cylindrical piece is opposite to the arc-shaped surface of the second cylindrical surface, and the regulating device is used for regulating the distance between the arc-shaped surface of the first cylindrical piece and the arc-shaped surface of the second cylindrical piece. The effective focus size regulating device and method regulate the effective focus size of the ray of an original electron linear acceleration through changing the size of the gap between two cylindrical arc-shaped pieces of the device and the field angle between the cylindrical arc-shaped pieces. The effective focus size regulating device for the double-cylindrical electron linear accelerator is simple in structure, is convenient to operate, is low in cost, and does not change the inside structure of the existing electron linear accelerator.

Description

technical field [0001] The invention relates to a device and method for adjusting the effective focus size of a double-cylindrical electron linear accelerator, so as to improve the detection accuracy of the accelerator industrial CT detection equipment and improve the image quality. Background technique [0002] In the non-destructive testing industry, the demand for high-precision radiographic testing is getting higher and higher, and the geometric dimensions of the workpieces are also very different. For high-density large workpieces, the equivalent steel thickness of the ray penetration path is relatively large, and electronic straight line is required for testing. High-energy X-rays produced by accelerators. At the same time, the detection accuracy is related to the geometric size of the effective focal point of the ray. Theory and practice have proved that the effective focal point size of the ray source is one of the main factors determining the spatial resolution of i...

AI Technical Summary

Problems solved by technology

Although traditional electric field focusing or magnetic field focusing methods can effectively obtain smaller X-ray focal points, these methods have many problems when applied to accelerator industrial CT, such as complex design and processing, high cost, large volume, high energy consumption, and Difficult to adjust the size, etc.

On the other hand, by adopting the electron flow focusing method, the electron beam density incident on the accelerator target is increased, and the power density is correspondingly greatly increased, which can easily cause the accelerator target to burn out and affect the life of the electron linear accelerator.

Images