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<p class="MsoNormal">Dear all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please find below (and attached docx file) the abstract of my talk at the 2023 International Workshop on Future Linear Colliders (LCWS2023) at SLAC, May 15-19, 2023.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Your feedback and comments would be greatly appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind regards,<o:p></o:p></p>
<p class="MsoNormal">Andriy<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">---<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Title: High Power Solid Target for Positron Source at CEBAF<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Authors:<o:p></o:p></p>
<p class="MsoNormal">A. Ushakov, S. Covrig, J. Grames (Jefferson Lab, Newport News, VA USA)<o:p></o:p></p>
<p class="MsoNormal">C. Le Galliard, E. Voutier (IJCLab, Orsay, France)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Abstract:<o:p></o:p></p>
<p class="MsoNormal">The progress in the development of a polarized positron injector for the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Laboratory is presented. The polarized positron beam is generated by a high current polarized electron
beam (> 1 mA @ 120 MeV) via bremsstrahlung radiation and e+e- pair production in the tungsten target. The simulations show that using an optimized target and positron beamline, the positron injector can provide the cw positron beam with a current of more than
50 nA, polarization above 60%, and energy of 123 MeV into the North Linac of CEBAF. The results of the thermal and structural FEA analysis of the heat load in the target are presented, as well as the simulation results of radiation damage in the target. The
performed and planned target material fatigue and radiation damage tests are discussed.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This work was supported by the U.S. DOE, Office of Science, Office of Nuclear Physics, Contract No. DE-AC05-06OR23177 and the EU’s Horizon 2020 Research and Innovation program, Grant Agreement No. 824093.<o:p></o:p></p>
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