Effects of Elliptically Polarizing Undulator on Beam Dynamics in PLS-II
  The non-linear effects caused by the intrinsic field transverse roll-off in an Elliptically Polarizing Undulator with 72-mm period and maximum peak field of 0.72 T (EPU72) on the dynamics aperture of the Pohang Light Source II (PLS-II) were investigated. A kick map and Frequency map analysis both demonstrated that EPU72 will not reduce the lifetime or cause injection problems in PLS-II. 
S. Shin, D-E. Kim and J-Y. Huang
physics.acc-ph