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arXiv · 2405.09583

Comparison of WarpX and GUINEA-PIG for electron positron collisions

Bao Nguyen·Arianna Formenti·Remi Lehe·Jean-Luc Vay·Spencer Gessner·Luca Fedeli
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Abstract

As part of the Snowmass'21 planning exercise, the Advanced Accelerator Concepts community proposed developing multi-TeV linear colliders and considered beam-beam effects for these machines. Such colliders operate under a high disruption regime with an enormous number of electron-positron pairs produced from QED effects. Thus, it requires a self-consistent treatment of the fields produced by the pairs, which is not implemented in state-of-the-art beam-beam codes such as GUINEA-PIG. WarpX is a parallel, open-source, and portable particle-in-cell code with an active developer community that models QED processes with photon and pair generation in relativistic laser-beam interactions. However, its application to beam-beam collisions has yet to be fully explored. In this work, we benchmark the luminosity spectra, photon spectra, and coherent production process from WarpX against GUINEA-PIG in the ILC and ultra-tight collision scenarios. Our performance comparison demonstrates a significant speed-up advantage of WarpX, ensuring a more robust and efficient modeling of electron-positron collisions at multi-TeV energies.

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Bao Nguyen, Arianna Formenti, Remi Lehe, Jean-Luc Vay, Spencer Gessner, Luca Fedeli. 2024-05-15. Comparison of WarpX and GUINEA-PIG for electron positron collisions. https://doi.org/10.18429/jacow-ipac2024-wepc84

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