Author: Falgari, P.
Paper Title Page
FRB02
 Theory and Simulation of FELs with Planar, Helical, and Elliptical Undulators  
 
  • H. Freund
    CSU, Fort Collins, Colorado, USA
  • L.T. Campbell
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • P. Falgari
    Lime BV, Eindhoven, The Netherlands
  • D.L.A. Grimminck, I. Setya
    ASML, Veldhoven, The Netherlands
  • J. Henderson, B.W.J. MᶜNeil
    USTRAT/SUPA, Glasgow, United Kingdom
  • P.J.M. van der Slot
    Mesa+, Enschede, The Netherlands
  
  Free-electron lasers (FELs) that produce different polarizations of the output radiation ranging from linear through elliptic to circular polarization are currently under study. In particular, elliptic polarizations are undergoing increased interest. In this paper, we develop an analytic model of the resonant wavelength and JJ-factor for an elliptic undulator as well as both one- and three-dimensional, time-dependent formulations that are capable of simulating elliptic undulators using the PUFFIN and MINERVA simulation codes.*,** We present an analytic model of an APPLE-II undulator that is capable of modeling arbitrary elliptic polarizations, and discuss examples of simulation results.
* J. Henderson, L. Campbell, H. Freund, and B. McNeil, New J. Phys. 18, 062003 (2016).
** H. Freund, P. van der Slot, D. Grimminck, I. Setya, and P. Falgari, New J. Phys. 19, 023020 (2017).
 		 
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