A method for ensuring the coaxiality of a high-energy electron gun body

By employing multi-step welding and brazing processes, combined with heat treatment and nickel plating, the problem of poor coaxiality of the domestically produced high-energy electron gun body was solved, resulting in a high-coaxiality electron gun body and improving the quality of the electron beam.

CN118989862BActive Publication Date: 2026-05-26SHENYANG SCI INSTR RES CENT CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENYANG SCI INSTR RES CENT CHINESE ACAD OF SCI
Filing Date
2023-05-18
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The poor coaxiality of the domestically produced high-energy electron gun body affects the beam current and beam spot quality of the electron beam, and the manufacturing process needs to be improved to enhance coaxiality.

Method used

Multi-step welding and brazing processes are employed, including argon arc welding, ion beam welding, and brazing, combined with heat treatment and nickel plating, to ensure precise assembly and welding of each component. In particular, the use of argon arc welding fixtures and ion beam fixtures controls welding deformation and achieves a highly coaxial electron gun body.

Benefits of technology

It improved the overall coaxiality of the electron gun body, ensured the coaxiality of the core components, enhanced the performance of the electron beam, solved the problem of poor electron beam performance caused by poor coaxiality, and provided guidance for the production of electron guns.

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Abstract

This invention discloses a method for ensuring the coaxiality of a high-energy electron gun body, belonging to the field of high-energy electron guns. The method includes: (1) first assembling the flange connector, Kovar ring I, Kovar ring II, and ceramic tubing onto an argon arc welding fixture I, and then using argon arc welding to weld Kovar ring I to the flange connector and flange to obtain a flange ceramic assembly; (2) milling the installation reference surface after welding; (3) argon arc welding the square cavity weldment; (4) machining the square cavity weldment after welding; (5) ion beam welding the anode plate; (6) ion beam welding the square cavity weldment; (7) brazing the ceramic tubing to Kovar ring I and Kovar ring II. By rationally arranging the welding and milling processes using this method, the coaxiality of the gun body can be ensured, thereby improving the assembly accuracy of the high-energy electron gun and the performance of the electron beam. This invention provides a method for the processing and manufacturing of a high-energy electron gun body, and this method also has guiding significance for the production and manufacturing of electron guns.
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