SIMULATION OF LASER PROPAGATION IN A PLASMA WITH A FREQUENCY WAVE EQUATION

Sylvain Desroziers (1) , Frédéric Nataf (2) , Remi Sentis (1)

1 Commissariat à l'Energie Atomique
2 LJLL - Laboratoire Jacques-Louis Lions

The aim of this work is to perform numerical simulations of the propagation of a laser in a plasma. At each time step, one has to solve a Helmholtz equation in a domain which consists in some hundreds of millions of cells. To solve this huge linear system, one uses a iterative Krylov method with a preconditioning by a separable matrix. The corresponding linear system is solved with a block cyclic reduction method. Some enlightments on the parallel implementation are also given. Lastly, numerical results are presented including some features concerning the scalability of the numerical method on a parallel architecture.

Mots clés: laser plasma interaction; high performance parallel computing; domain decomposition method

Domaines: Analyse numérique [math.NA]

Sylvain Desroziers, Frédéric Nataf, Remi Sentis. SIMULATION OF LASER PROPAGATION IN A PLASMA WITH A FREQUENCY WAVE EQUATION. 2007. ⟨hal-00144243⟩