This was part of Computational Challenges and Optimization in Kinetic Plasma Physics

Exponential integrators for Vlasov equations

Nicolas Crouseilles, INRIA

Wednesday, February 21, 2024

Abstract: In this talk, we will discuss exponential time integrators for the numerical approximation of Vlasov type equations. These time integrators are known to satisfy enhanced stability properties in this context since they do not suffer from the stability condition induced from the linear part. We introduce here a class of modified Lawson integrators in which the linear part is approximated in such a way that some geometric properties of the underlying model are preserved, which has important consequences for the analysis of the scheme. Several Vlasov-Maxwell examples are presented to illustrate the good behavior of the approach.