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 ›› 2019, Vol. 30 ›› Issue (8): 118 doi: 10.1007/s41365-019-0640-0


Research on the comprehensive performance of PrFeB magnets for synchrotron radiation and free electron laser

Yong-Zhou He1,Xiao-Qing Bao2,Wei Zhang1,Qiao-Gen Zhou   

  1. 1 The Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 The University of Science and Technology Beijing (USTB), Beijing 100083, China
  • Received:2018-11-03 Revised:2019-03-05 Accepted:2019-04-03
  • Contact: Yong-Zhou He
  • Supported by:
    This work was supported by project of the State Key Lab of Advanced Metals and Materials (No. 2016-Z03).
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Yong-Zhou He, Xiao-Qing Bao, Wei Zhang, Qiao-Gen Zhou. Research on the comprehensive performance of PrFeB magnets for synchrotron radiation and free electron laser.Nuclear Science and Techniques, 2019, 30(8): 118     doi: 10.1007/s41365-019-0640-0

Abstract: PrFeB magnets, which possess excellent magnetic properties at low temperatures, have important application value as cryogenic permanent magnet undulators for synchrotron radiation sources and free electron lasers. In this research study, several high-performance PrFeB magnets (P42H, P48SH, and P48UH) were prepared, and their performance was comprehensively examined, including evaluations of their magnetic properties, microstructures, uniformity, and stability. Next, their application prospects were analyzed and discussed. In China, the first cryogenic permanent magnet undulators (CPMUs) with P48SH magnets with 18 mm cycle lengths have been developed. When the temperature is 80 K and the gap is 6.0 mm, the magnetic field measurement results of the CPMU showed that the effective magnetic field peak was approximately 0.92 T, yielding an increase of 11.76% relative to operation at 300 K, with an RMS phase error of about 4.99.

Key words: PrFeB magnets, Cryogenic permanent magnet undulators, Grain boundary diffusion method, Free electron laser