Sm<SUB>2</SUB>Co<SUB>17</SUB> magnet blocks for the in-vacuum undulators (IVU20) at the SSRF

HE Yong-Zhou; ZHOU Qiao-Gen; ZHANG Ji-Dong

doi:10.1088/1674-1137/35/4/013

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

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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 H_ci and the average magnetic moment M are increased, the bend point magnetic field H_k 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.

References

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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

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Received: 2010-06-25
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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 H_ci and the average magnetic moment M are increased, the bend point magnetic field H_k 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.