Radiation friction modeling in superintense laser-plasma interactions
2011
Radiation Friction or Reaction (RR) effects are important for highly relativistic electrons in superintense electromagnetic
fields and are thus expected to play a crucial role in next-term experiments. It is therefore important to
include RR in particle-in-cell (PIC) simulations of laser-plasma by an appropriate modeling, keeping the essential
RR effects into account while retaining at the same time the capability to perform large-scale simulations. We
describe a suitable approach, based on the Landau-Lifshitz equation, which allows the insertion of RR in PIC
codes in a modular way and with a very reduced computational cost. Properties of the kinetic equation with RR
which is effectively solved by the PIC method are also discussed. We then present the results of multi-dimensional
PIC simulations, mainly on radiation pressure acceleration of thin foil targets, addressing the importance of RR
effects and showing the strong role played by the laser pulse polarization.
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