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P: Plasmaphysik

P 2: Heavy Ion Physics

P 2.3: Vortrag

Montag, 17. März 2003, 16:25–16:45, FO2

3D gridless particle simulation of fast particle transport in Petawatt laser-plasma interactions — •Paul Gibbon — John von Neumann Institute of Computing, Forschungszentrum Jülich GmbH, D-53435 Jülich

Using a new parallel plasma tree-code—PEPC (see related Posters [1,2], these Proceedings), kinetic simulations of fast electron transport and ion acceleration are performed for a variety of target geometries. In particular, spherical targets are used to emulate Coulomb explosions of atomic clusters and compare with a recently developed absorption model [3]; cylindrical columns to model recent experiments by the Imperial College Group at RAL with wire targets [4]. The built-in, controllable collisionality of this method allows far more realistic modelling of particle transport in the cold, dense plasmas typical of contemporary laser-solid interaction experiments than is currently possible with standard PIC simulation.

[1] P. Gibbon, Introducing PEPC—a Parallel Electrostatic Plasma Coulomb-solver, DPG Proceedings, Aachen 2003.

[2] S. Pfalzner, Multiple timestep plasma tree code, DPG Proceedings, Aachen 2003.

[3] F. Greschik, L. Dimou and H.-J. Kull, Laser & Particle Beams 18, 367 (2000).

[4] F. Beg, K. Kruschelnick et al., Private Communication (2002).