Modelling Gamma Ray Emission and Pair Production in High-Intensity Laser-Matter 
Interactions

Ridgers, C. P.; Kirk, John G.; Duclous, R.; Blackburn, T.; Brady, C. S.; Bennett, K.; Arber, T. D.; Bell, A. R.

doi:10.1016/j.jcp.2013.12.007

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Journal Article

Modelling Gamma Ray Emission and Pair Production in High-Intensity Laser-Matter Interactions

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Kirk, John G.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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http://dx.doi.org/10.1016/j.jcp.2013.12.007
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1311.5551.pdf
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Citation

Ridgers, C. P., Kirk, J. G., Duclous, R., Blackburn, T., Brady, C. S., Bennett, K., et al. (2014). Modelling Gamma Ray Emission and Pair Production in High-Intensity Laser-Matter Interactions. Journal of Computational Physics, 260, 273-285. doi:10.1016/j.jcp.2013.12.007.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-7A14-6

Abstract

In high-intensity (> 10²¹W/cm²) laser-matter interactions gamma-ray photon emission by the electrons can strongly aff?ect the electron's dynamics and copious numbers of electron-positron pairs can be produced by the emitted photons. We show how these processes can be included in simulations by coupling a Monte-Carlo algorithm describing the emission to a particle-in-cell code. The Monte-Carlo algorithm includes quantum corrections to the photon emission, which we show must be included if the pair production rate is to be correctly determined. The accuracy, convergence and energy conservation properties of the Monte-Carlo algorithm are analysed in simple test problems.