Topic/Type: 1.3 High intensity Laser Plasma Interaction, Oral

Ultra-fast full-PIC simulations of LWFA in boosted frames

S. F. Martins1, R. A. Fonseca1, 2, W. Lu3, W. B. Mori3, L. O. Silva1

1 GoLP, Instituto de Plasmas e Fus?o Nuclear - Instituto Superior T?cnico, Lisbon, Portugal
2 DCTI/ISCTE, Lisbon, Portugal
3 University of California Los Angeles, Los Angeles, USA

The development of new laser systems, in the 10PW range, will push Laser Wakefield Accelerators (LWFA) to a new qualitative regime, for which theoretical scalings predict the possibility to accelerate electron bunches above 40GeV. As in the past, numerical simulations will certainly play an important role in testing, probing and optimizing the physical parameters and setup of these upscale experiments. The distances involved in these numerical experiments, however, are very computationally demanding so that three-dimensional fully kinetic simulations are not yet possible to (easily) accomplish. Following the work on optimized Lorentz frames by J.-L. Vay [1], the Lorentz transformation for a boosted frame was implemented in OSIRIS [2], leading to a dramatic change in the computational resources required to model LWFA. The critical implementation details will be described, and the main difficulties discussed, in particular the numerical instabilities that arise from the laser/moving plasma interaction. Quantitative benchmarks will be presented between boosted frame, laboratory frame simulations, and also with experimental results from Imperial College and Lawrence Livermore National Laboratory.

[1] J.-L. Vay, PRL 98, 130405 (2007)

[2] R. A. Fonseca et al, LNCS 2329, III-342 (Springer-Verlag, 2002)