Energy dispersion in radiation pressure accelerated ion beams

We address the problem of energy dispersion of radiation pressure accelerated (RPA) ion beams emerging from a thin target. Two different acceleration regimes, namely phase-stable acceleration and multistage acceleration, are considered by means of analytical modeling and onedimensional particle-in-cell simulations. Our investigations offer a deeper understanding of RPA and allow us to derive some guidelines for generating monoenergetic ion beams.