A null-space electrostatic beamlet focusing device and method of focusing

CN122294355APending Publication Date: 2026-06-26CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Filing Date
2026-03-20
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing beam focusing devices occupy additional space and increase power consumption in compact acceleration systems, making it difficult to balance beam focusing performance with the need for device miniaturization.

Method used

A zero-space electrostatic beam focusing device is adopted, which integrates the beam focusing function into the acceleration structure in an embedded manner. The disc electrodes in the acceleration structure form an equivalent three-film electrostatic lens structure to achieve beam pre-focusing and shaping control.

Benefits of technology

This method achieves effective beam focusing and shaping control without increasing the system's longitudinal dimensions and power consumption, simplifies the system structure, reduces costs, and is suitable for compact accelerator devices.

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Abstract

This invention relates to a zero-space electrostatic beam focusing device, comprising a front focusing structure and a rear focusing structure. The front focusing structure is disposed at the front end of the accelerating tube, and the rear focusing structure is disposed behind the front focusing structure. The front focusing structure includes a lens flange, a high-voltage terminal, a first electrode, a second electrode, and a first dish electrode, thereby forming a symmetrical electrostatic field distribution at the front end of the accelerating tube, constituting an equivalent three-film electrostatic lens structure, realizing the pre-focusing function before the beam enters the accelerating tube. The rear focusing structure includes at least one focusing unit, which includes a second dish electrode, a third dish electrode, and a fourth dish electrode, thereby forming an equivalent three-film electrostatic lens structure inside the accelerating tube, realizing the beam shaping function transmitted inside the tube. Without increasing the longitudinal dimension of the accelerator system and without introducing additional independent focusing devices, the beam focusing function is integrated into the accelerating structure in an embedded manner, thereby saving system space and reducing system power consumption.
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