Evaluation of a High-Power Target Design for Positron Production at CEBAF

2023/09/24 by A. Ushakov, S. Covrig, Ushakov, A. +9
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #Muon and positron interactions and applications #Nuclear Physics and Applications #Particle accelerators and beam dynamics

paper · pdf · doi:10.48550/arxiv.2309.13754

openalex publication_date 2023/09/24 · openalex created_date 2023/09/27 · openalex updated_date 2026/08/03

Abstract

A source for polarized positron beams at the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab is being designed. The Polarized Electrons for Polarized Positrons (PEPPo) concept is used to produce polarized e⁺e^--pairs from the bremsstrahlung radiation of a longitudinally polarized electron beam interacting within a high-Z conversion target. The scheme under consideration includes a 4 mm thick tungsten target that absorbs 17 kW deposited by a 1 mA continuous-wave electron beam with an energy of 120 MeV. The concept of a rotating tungsten rim mounted on a water-cooled copper disk was explored. The results of ANSYS thermal and mechanical analyses are discussed together with FLUKA evaluations of the radiation damages.

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