Author: Yang, Z.H.
Paper Title Page
WEPIK080 Preliminary Study of Beam Dynamics Compensation for the Elliptically Polarized Undulator at the HLS-II 3114
SUSPSIK050   use link to see paper's listing under its alternate paper code  
 
  • Z.H. Yang, Z.H. Bai, W. Li, L. Wang
    USTC/NSRL, Hefei, Anhui, People's Republic of China
 
  An elliptically polarized undulator (EPU) was installed at the upgraded Hefei Light Source, HLS-II, for special users. Due to that the area of good field of the EPU is not large enough, the resulting beam dynamics is serious. At present, the lattice is changed to lower beta functions at the EPU to solve this problem. However, the compensation for the EPU is necessary for better operation of the machine in the future. In this paper, we used the surface fitting method to extract the Hamiltonian of the EPU from the real surface magnetic field data. Thus, we can obtain the effective Hamiltonian of the ring, which can be analyzed using normal form or other techniques. Then the beam dynamics effects resulting from the EPU can be compensated by optimizing the nonlinear quantities with striplines.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK080  
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