Study of the Beam Tune-Shift Effects for DEPU at SSRF

A pair of EPUs (DEPU) with the period 58 mm and 148 mm, covering the energy ranges from 20 to 200 eV and 200 to 2000 eV of arbitrary polarized light, will be developed for the soft X-ray beam line for ARPES and PEEM at SSRF. The effects to the beam tune-shift for DEPU are studied with Kick-Map method via RADIA code and the results are presented in this paper.