Author: Goldring, N.B.
Paper Title Page
TUPAG17 Beamline Map Computation for Paraxial Optics 297
 
  • B. Nash, J.P. Edelen, N.B. Goldring, S.D. Webb
    RadiaSoft LLC, Boulder, Colorado, USA
 
  Funding: Department of Energy office of Basic energy sciences, DE-SC0018571
Mod­el­ing of ra­di­a­tion trans­port is an im­por­tant topic tightly cou­pled to many charged par­ti­cle dy­nam­ics sim­u­la­tions for syn­chro­tron light sources and FEL fa­cil­i­ties. The ra­di­a­tion is de­ter­mined by the elec­tron beam and mag­netic field source, and then passes through beam­lines with fo­cus­ing el­e­ments, aper­tures and mono­chro­ma­tors, in which one may typ­i­cally apply the parax­ial ap­prox­i­ma­tion of small an­gu­lar de­vi­a­tions from the op­ti­cal axis. The ra­di­a­tion is then used in a wide range of spec­tro­scopic ex­per­i­ments, or else may be re­cir­cu­lated back to the elec­tron beam source, in the case of an FEL os­cil­la­tor. The Wigner func­tion rep­re­sen­ta­tion of elec­tro­mag­netic wave­fronts has been de­scribed in the lit­er­a­ture and al­lows a phase space de­scrip­tion of the ra­di­a­tion, sim­i­lar to that used in charged par­ti­cle dy­nam­ics. It can en­com­pass both fully and par­tially co­her­ent cases, as well as po­lar­iza­tion. Here, we de­scribe the cal­cu­la­tion of a beam­line map that can be ap­plied to the ra­di­a­tion Wigner func­tion, re­duc­ing the com­pu­ta­tion time. We dis­cuss the use of ray trac­ing and wave op­tics codes for the map com­pu­ta­tion and bench­mark­ing. We con­struct a four crys­tal 1:1 imag­ing beam­line that could be used for re­cir­cu­la­tion in an XFEL os­cil­la­tor, and bench­mark the map based re­sults with SRW wave­front sim­u­la­tions.
 
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-TUPAG17  
About • paper received ※ 19 October 2018       paper accepted ※ 18 December 2018       issue date ※ 26 January 2019  
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