CONCEPT OF A POLARIZED POSITRON SOURCE FOR CEBAF

Conference · Wed Jul 06 04:00:00 EDT 2022

DOI:https://doi.org/10.18429/JACoW-IPAC2022-MOPOTK012· OSTI ID:1881929

Habet, S. H. ^[1]; Bodenstein, R. M. ^[2]; Bogacz, S. Alex ^[2]; Grames, J. M. ^[2]; Hofler, A. S. ^[2]; Kazimi, R. ^[2]; Lin, F. ^[2]; Poelker, M. ^[2]; Roblin, Y. ^[2]; Seryi, A. ^[2]; Suleiman, R. ^[2]; Sy, A. V. ^[2]; Turner, D. L. ^[2]; Ushakov, A. ^[3]; Valerio-Lizarraga, C. A. ^[4]; Voutier, E. J.-M. ^[5]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); IJCLab Universite Paris, Saclay, France
2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
3. Université Paris-Saclay, Orsay (France)
4. ECFM-UAS, Culiacan, Sinaloa, Mexico
5. Univ. Joseph Fourier, Grenoble (France). Inst. National Polytechnique de Grenoble, Lab. de Physique Subatomique & Cosmologie (LPSC)

Positron beams would provide new and meaningful probes for the experimental program at the Thomas Jefferson National Accelerator Facility (JLab), including but not limited to future hadronic physics and dark matter experiments. Critical requirements involve generating positron beams with a high degree of spin polarization, sufficient intensity and a continuous-wave (CW) bunch train compatible with acceleration to 12 GeV at the Continuous Electron Beam Accelerator Facility (CEBAF). To address these requirements, a polarized positron injector based upon the bremsstrahlung of an intense CW spin polarized electron beam is considered*. First a polarized electron beam line provides >1 mA of polarized electrons at ~120 MeV to a high-power target for positron production. Next, a second beam line collects, shapes and aligns the spin of positrons for users. Finally, the positron beam is matched into the CEBAF acceptance for acceleration and transport to the end stations with energies up to 12 GeV. An optimized layout to provide positrons beams with intensity >100 nA (polarized) or intensity >3 µA (unpolarized) will be discussed in this poster.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1881929
• Report Number(s): JLAB-ACC-22-3629; DOE/OR/23177-5506
• Country of Publication: United States
• Language: English