Modeling of generation, capture, and acceleration of positron beams at BELLA*

Future, compact high-energy (TeV-class) colliders will require the production and acceleration of high-quality positron beams. We explored the possibility of using a 10 GeV-class electron beam from a laser-driven plasma accelerator, such as the ones under development at the BELLA Center of LBNL, to produce a positron beam. This can be achieved by capturing the particles generated during the pair decay of Bremsstrahlung radiation that is created when the relativistic electron beam travels through a high-Z solid target. We model the production of positron beams with the Monte Carlo based Geant4 library, and their capture and acceleration in plasmas using the WarpX particle-in-cell code. In this talk we will discuss scenarios relevant to future experiments at the BELLA Center.