  Laser-driven ion acceleration provides ultra-short, high-charge,
low-emittance beams, which are desirable for a wide range of high-impact
applications. Yet after decades of research, a significant increase in maximum
ion energy is still needed. This work introduces a quality-preserving staging
concept for ultra-intense ion bunches that is seamlessly applicable from the
non-relativistic plasma source to the relativistic regime. Full 3D
particle-in-cell simulations prove robustness and capture of a high-charge
proton bunch, suitable for readily available and near-term laser facilities.
