Weighted Particle Monte Carlo Method for Effective Simulation of Electromagnetic Cascades

We present a new version of the event generator for simulation of quantum electromagnetic cascades generated in plasma irradiated by ultra-intense laser field. The new code is capable to account for very soft photons as well as for polarization effects in nonlinear vacuum. Numerical implementation differs significantly from the original version aiming to provide a guaranteed accuracy of computations. The code is benchmarked against the semi-analytical solution describing electromagnetic cascade in a rotating field. (paper)