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@article{Watt:2023:10.1103/physrevaccelbeams.26.054601,
author = {Watt, RA and Rose, SJ and Kettle, B and Mangles, SPD},
doi = {10.1103/physrevaccelbeams.26.054601},
journal = {Physical Review Accelerators and Beams},
pages = {1--7},
title = {Monte Carlo modeling of the linear Breit-Wheeler process within the geant4 framework},
url = {http://dx.doi.org/10.1103/physrevaccelbeams.26.054601},
volume = {26},
year = {2023}
}

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TY  - JOUR
AB  - A linear Breit-Wheeler module for the code geant4 has been developed. This allows signal-to-noise ratio calculations of linear Breit-Wheeler detection experiments to be performed within a single framework. The interaction between two photon sources is modeled by treating one as a static field, then photons from the second source are sampled and tracked through the field. To increase the efficiency of the module, we have used a Gaussian process regression, which can lead to an increase in the calculation rate by a factor of up to 1000. To demonstrate the capabilities of this module, we use it to perform a parameter scan, modeling an experiment based on that recently reported by Kettle et al. [New J. Phys. 23, 115006 (2021)]. We show that colliding 50-fs duration γ rays, produced through bremsstrahlung emission of a 100 pC, 2-GeV laser wakefield accelerator beam, with a 50-ps x-ray field, generated by a germanium burn-through foil heated to temperatures >150  eV, this experiment is capable of producing >1 Breit-Wheeler pair per shot.
AU  - Watt,RA
AU  - Rose,SJ
AU  - Kettle,B
AU  - Mangles,SPD
DO  - 10.1103/physrevaccelbeams.26.054601
EP  - 7
PY  - 2023///
SN  - 2469-9888
SP  - 1
TI  - Monte Carlo modeling of the linear Breit-Wheeler process within the geant4 framework
T2  - Physical Review Accelerators and Beams
UR  - http://dx.doi.org/10.1103/physrevaccelbeams.26.054601
UR  - https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.26.054601
UR  - http://hdl.handle.net/10044/1/104622
VL  - 26
ER  -

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