Author: Zhou, Q.G.
Paper Title Page
MOPPP075 The Research on Magnetic Properties of Magnet for SSRF Cryogenic Permanent Magnet Undulator 735
  • Y.Z. He, L. Wang, Q.G. Zhou
    SINAP, Shanghai, People's Republic of China
  The temperature coefficient of Br and Hci of Nd2Fe14B and Pr2Fe14B permanent magnet are about -0.1 K-1 and -0.6 K-1 respectively, the higher Br and Hci can be obtained at low temperature. By this theory, a cryogenic permanent magnet undulator(CPMU) may be designed, the maximum magnetic field and the Hci of permanent magnet increased 10-50% and 300-500% respectively, compared with the conventional undulators, the higher brightness X-rays and the more resistance to radiation of undulators can be obtained. The Pr2Fe14B permanent magnet has better potential magnetic properties than the Nd2Fe14B permanent magnet at low temperature for having no spin reorientation phenomenon. The permanent magnets are key “heart” magnetic components for cryogenic permanent magnet undulator, since January 2012, the research plan on magnetic properties of domestic permanent magnet for SSRF cryogenic permanent magnet undulator at low temperature by the support of Shanghai and Nation Nature science funds be started, the paper introduced research status of the item.  
TUPPC075 Study of Nonlinear Beam Dynamics Effects for DEPU at SSRF 1347
  • M. Zhang, Q.G. Zhou
    SINAP, Shanghai, People's Republic of China
  A pair of EPUs (DEPU) with the period 58mm and 148mm, covering the energy ranges from 20 to 200eV and 200 to 2000eV of arbitrary polarized light, will be developed for the SSRF soft X-ray beam line for ARPES and PEEM. The effects of DEPU to tune-shift produced by the nonlinear beam dynamics are studied and the results are presented in this paper. The corresponding magnet field shimming technology to reduce these effects is also investigated.