Kinetic effects on the transition to relativistic self-induced transparency in laser-driven ion acceleration
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2016

We study kinetic effects responsible for the transition to relativistic self-induced transparency in the interaction of a circularly-polarized laser-pulse with an overdense plasma and their relation to hole-boring and ion acceleration. It is shown, using particle-in-cell simulations and an analysis of separatrices in single-particle phase-space, that this transition is mediated by the complex interplay of fast electron dynamics and ion motion at the initial stage of the interaction. It thus depends on the ion charge-to-mass ratio and can be controlled by varying the laser temporal profile. Moreover, we find a new regime in which a transition from relativistic transparency to hole-boring occurs dynamically during the course of the interaction. It is shown that, for a fixed laser intensity, this dynamic transition regime allows optimal ion acceleration in terms of both energy and energy spread.

Författare

Evangelos Siminos

Chalmers, Fysik, Subatomär fysik och plasmafysik

Benjamin Svedung Wettervik

Chalmers, Fysik, Subatomär fysik och plasmafysik

M Grech

Tünde Fülöp

Chalmers, Fysik, Subatomär fysik och plasmafysik

58th Annual Meeting of the APS Division of Plasma Physics

Vol. 61 TO6.00007-

Fundament

Grundläggande vetenskaper

Ämneskategorier

Fusion, plasma och rymdfysik