Author: Baribeau, C.K.
Paper Title Page
MOPAB095 Concept Design for the CLS2 Accelerator Complex 354
 
  • M.J. Boland, P.J. Hunchak
    University of Saskatchewan, Saskatoon, Canada
  • C.K. Baribeau, D. Bertwistle, J.M. Patel, H. Shaker, X. Shen, M.J. Sigrist
    CLS, Saskatoon, Saskatchewan, Canada
  • F. Le Pimpec
    EuXFEL, Schenefeld, Germany
  • E.J. Wallén
    LBNL, Berkeley, California, USA
  
  The Cana­dian Light Source has been in op­er­a­tion since 2005 and is now look­ing at a de­sign con­cept to up­grade to a fourth gen­er­a­tion stor­age ring. A brief overview is given of a pos­si­ble ac­cel­er­a­tor com­plex lay­out, in­clud­ing some de­tails on the lat­tice de­sign and in­jec­tion sys­tem. A full en­ergy linac is being ex­plored as an op­tion for top-up in­jec­tion and to fu­ture proof the fa­cil­ity for a po­ten­tial FEL up­grade in the fu­ture.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB095  
About • paper received ※ 23 May 2021       paper accepted ※ 28 July 2021       issue date ※ 13 August 2021  
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WEXC05 First Results Operating a Long-Period EPU in Universal Mode at the Canadian Light Source 2566
 
  • W.A. Wurtz, C.K. Baribeau, D. Bertwistle, M.J. Sigrist
    CLS, Saskatoon, Saskatchewan, Canada
  
  The Quan­tum Ma­te­ri­als Spec­troscopy Cen­tre beam­line at the Cana­dian Light Source (CLS) re­quires pho­tons with en­er­gies as low as 15 eV with cir­cu­lar po­lar­iza­tion at the end sta­tion. This en­ergy range is ac­com­plished on the 2.9 GeV CLS stor­age ring using an el­lip­ti­cally po­lar­iz­ing un­du­la­tor (EPU) with a 180 mm pe­riod, which we call EPU180. In order to re­al­ize cir­cu­lar po­lar­ized pho­tons at the end sta­tion with this low en­ergy, we must over­come two tech­ni­cal is­sues. First, the beam­line op­tics dis­tort the po­lar­iza­tion of the light, so we com­pen­sate by pro­vid­ing light with a flat­tened, tilted po­lar­iza­tion el­lipse at the source point - a mode of op­er­a­tion known as uni­ver­sal mode. Sec­ond, the de­vice has a strong ef­fect on the elec­tron beam due to dy­namic fo­cus­ing and is ca­pa­ble of re­duc­ing the in­jec­tion ef­fi­ciency to zero. We over­come this non-lin­ear dy­namic fo­cus­ing using cur­rent strips ad­hered to the vac­uum cham­ber. In this re­port, we pre­sent the first re­sults with op­er­at­ing EPU180 in uni­ver­sal mode and we re­cover the dy­namic aper­ture using the cur­rent strips.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEXC05  
About • paper received ※ 13 May 2021       paper accepted ※ 05 July 2021       issue date ※ 11 August 2021  
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