Effects of relativistic binary collisions on PIC simulation of laser plasmas

Relativistic binary collision effects on the intense laser plasma interacti ons are investigated by introducing the Monte Carlo Coulomb model into a pa rticle simulation code. Our collision model is fully relativistic, where th e collision frequency is calculated in the frame work of relativistic elect ro-dynamics. By the particle simulation, the following two phenomena which are important in laser plasmas are investigated. The first one is for the e lectron heat transport in a steep temperature gradient and the second is fo r the electron energy distribution function of plasmas heated by a relativi stic intensity laser irradiation. The results of the simulations are compar ed with the results of numerical analysis of the Fokker-Planck equation.