Radiation Pressure Dominate Regime of Relativistic Ion Acceleration
  The electromagnetic radiation pressure becomes dominant in the interaction of the ultra-intense electromagnetic wave with a solid material, thus the wave energy can be transformed efficiently into the energy of ions representing the material and the high density ultra-short relativistic ion beam is generated. This regime can be seen even with present-day technology, when an exawatt laser will be built. As an application, we suggest the laser-driven heavy ion collider. 
T. Esirkepov, M. Borghesi, S. V. Bulanov, G. Mourou, T. Tajima