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Chinese Physics C> 2011, Vol. 35> Issue(4) : 392-396 DOI: 10.1088/1674-1137/35/4/013

Sm2Co17 magnet blocks for the in-vacuum undulators (IVU20) at the SSRF

  • The design and development status of Sm2Co17 magnet blocks for two in-vacuum undulators (IVU20) at the SSRF with the same hybrid design has been described. By the technological improvement of some processes and comparison with the experimental Sm2Co17 magnet blocks for the IVU25A, magnetic properties such as the intrinsic coercive force Hci and the average magnetic moment M are increased, the bend point magnetic field Hk value and pass rate are significantly increased, and the magnetic field uniformity of the magnet blocks are significantly improved. The basic developmental method of high uniformity Sm2Co17 magnet blocks for IVU20 is presented. The magnetic field qualities of the magnet blocks, including the magnetic property, the magnetic moment distribution, the magnetization deviation angle and the magnetic field uniformity, basically satisfy the specifications of the two IVU20 in-vacuum undulators.
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    [1] JIA Qi-Ka. High Power Laser and Particle Beams, 2003, 15(6): 5 (in Chinese)2 HE Yong-Zhou, ZHANG Ji-Dong, ZHOU Qiao-Gen et al. High Power Laser and Particle Beams, 2010, 22(7): 1629 (in Chinese)3 Rober C.O'handley. Modern Magnetic Materials Principles and Applications. Beijing: Chemical Industry Press, 2002. 506-5074 Yamamoto S et al. Rev. Sci. Instrum., 1992, 63(1): 400-4-35 Yamamoto S et al. AIP Conf. Proc., 2004, 705: 211-2146 HE Shui-Jiao. The Latest Developments of HighPerformance SmCo Rare Earth Permanent Magnet. In: HE Shui-Jiao. China Magnetic IndustryStrategies Seminar for Sustainable Development by Leaps and Bounds. Mianyang: Southwest Institute of Applied Magnetic of China (SIAM), 2003. 66 (in Chinese)

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HE Yong-Zhou, ZHOU Qiao-Gen and ZHANG Ji-Dong. Sm2Co17 magnet blocks for the in-vacuum undulators (IVU20) at the SSRF[J]. Chinese Physics C, 2011, 35(4): 392-396. doi: 10.1088/1674-1137/35/4/013
HE Yong-Zhou, ZHOU Qiao-Gen and ZHANG Ji-Dong. Sm2Co17 magnet blocks for the in-vacuum undulators (IVU20) at the SSRF[J]. Chinese Physics C, 2011, 35(4): 392-396.  doi: 10.1088/1674-1137/35/4/013 shu
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Received: 2010-06-25
Revised: 1900-01-01
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Sm2Co17 magnet blocks for the in-vacuum undulators (IVU20) at the SSRF

  • Received Date: 2010-06-25
  • Accepted Date: 1900-01-01
  • Available Online: 2011-04-05

Abstract: The design and development status of Sm2Co17 magnet blocks for two in-vacuum undulators (IVU20) at the SSRF with the same hybrid design has been described. By the technological improvement of some processes and comparison with the experimental Sm2Co17 magnet blocks for the IVU25A, magnetic properties such as the intrinsic coercive force Hci and the average magnetic moment M are increased, the bend point magnetic field Hk value and pass rate are significantly increased, and the magnetic field uniformity of the magnet blocks are significantly improved. The basic developmental method of high uniformity Sm2Co17 magnet blocks for IVU20 is presented. The magnetic field qualities of the magnet blocks, including the magnetic property, the magnetic moment distribution, the magnetization deviation angle and the magnetic field uniformity, basically satisfy the specifications of the two IVU20 in-vacuum undulators.

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