Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

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


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


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