Modeling laser wakefield acceleration in a Lorentz boosted frame using OSIRIS and UPIC

We present recent results on the use of the Lorentz boosted frame to model laser wakefield acceleration using OSIRIS and UPIC framework. These include the modeling cases where there are no self-trapped electrons for gamma\_boost near gamma\_group where gamma\_group is the linear group velocity of the laser, and modeling the self-trapped regime. Detailed comparison between different gamma\_boost for the same lab frame parameters will be given. We also will discuss the observed short wavelength noise that is present for relatively high gamma\_boost, including detailed comparison between three FDTD solvers in OSIRIS and a spectral solver from the UPIC Framework.