Vacuum joints of dispersion-strengthened copper and its applications in synchrotron radiation front end

doi:10.1007/s41365-016-0130-6

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (6): 133 doi: 10.1007/s41365-016-0130-6

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles Next Articles

Vacuum joints of dispersion-strengthened copper and its applications in synchrotron radiation front end

Yong-Jun Li ^1,2, Song Xue ¹, Min Zhang ¹, Dan-Dan Jia ¹, Dong-Bai Dou ³, Yu Gao ³

¹ Shanghai Institute of Applied Physics, Chinese Academy of Sciences, ZhangJiang, Shanghai 201204, China
² University of Chinese Academy of Sciences, Beijing 100049, China
³SKY Technology Development Co., Ltd, Chinese Academy of Sciences, Shenyang 110179, China

Contact: Song Xue E-mail:xuesong@sinap.ac.cn

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Yong-Jun Li, Song Xue, Min Zhang, Dan-Dan Jia, Dong-Bai Dou, Yu Gao. Vacuum joints of dispersion-strengthened copper and its applications in synchrotron radiation front end.Nuclear Science and Techniques, 2016, 27(6): 133 doi: 10.1007/s41365-016-0130-6

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Abstract

Abstract:

Masks are critical elements of synchrotron radiation front end that are exposed to high temperature and stress. The absorber material is typically comprised of dispersion-strengthened copper, which can retain high performance at elevated temperature. Joining processes under vacuum, including brazing and electron beam welding, are novel approaches for prolonging the absorber and for reducing power densities. The mechanical properties of brazed joints and electron beam welded joints of dispersion-strengthened copper workpieces are evaluated by tensile testing at 20, 100, and 200 °C. The testing results indicate that the tensile strength and elongation of both vacuum joints decrease with increasing temperature. Compared to brazed joints, electron beam welded joints have higher tensile strength, better ductility, and more stable performance. A novel welded mask with a total length of 600 mm is presented and shown to be practical for use in the highest heat load front end in the Shanghai synchrotron radiation facility phase-II beamline project.

Key words: Dispersion-strengthened copper, Brazing, Electron beam welding, Synchrotron radiation, Front end

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Vacuum joints of dispersion-strengthened copper and its applications in synchrotron radiation front end

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