We present a Monte Carlo collisional scheme that models single Compton scattering between leptons and photons in particle-in-cell codes. The numerical implementation of Compton scattering can deal with macro-particles of different weights and conserves momentum and energy in each collision. Our scheme is validated through two benchmarks for which exact analytical solutions exist: the inverse Compton spectra produced by an electron scattering with an isotropic photon gas and the photon–electron gas equilibrium described by the Kompaneets equation. It provides new opportunities for numerical investigation of plasma phenomena where a significant population of high-energy photons is present in the system.

中文翻译：

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细胞内粒子代码中的康普顿散射

我们提出了一个蒙特卡洛碰撞方案，该方案模拟了细胞内粒子代码中轻子和光子之间的单个康普顿散射。康普顿散射的数值实现可以处理不同权​​重的宏观粒子，并在每次碰撞中保持动量和能量。我们的方案通过存在精确解析解的两个基准得到验证：由各向同性光子气体的电子散射产生的逆康普顿光谱和由 Kompaneets 方程描述的光子-电子气体平衡。它为系统中存在大量高能光子的等离子体现象的数值研究提供了新的机会。