Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (3): 30103-030103.doi: 10.11889/j.0253-3219.2015.hjs.38.030103


Mechanical design and analysis on the magnetic structure of an novel permanent magnet undulator in SSRF

ZHU Ya1,2 DENG Rongbing1 ZHOU Qiaogen1   

  1. 1(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 2(University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2014-11-14 Revised:2015-02-03 Online:2015-03-10 Published:2015-03-09


Background and Purpose: EPU200 (Elliptically Polarized Undulator) is designed to produce radiation with low on-axis power density in Shanghai Synchrotron Radiation Facility (SSRF) for experiment requirements of users. Methods: EPU200 is the first novel permanent magnet undulator which has eight rows of magnetic blocks and can produce different kinds of polarized radiation with low on-axis power density. The magnetic structure is installed on four aluminum beams, so there are two magnetic blocks which are installed in one magnet keeper. The arrangement of the magnetic blocks is complex, so there are various magnetic forces on the magnets. And the space between the magnetic blocks is small. Results: The mechanical structure and installation of the magnetic structure are accomplished, and the calculation results of magnetic force by Radia program are obtained. Conclusion: The results show that the magnetic structure of EPU200 by ANSYS Workbench ensures the feasibility of this structure.

Key words: Novel undulator, Magnetic structure, Mechanical design, Finite element analysis