Topic/Type: 1.3 High intensity Laser Plasma Interaction, Poster

On the energy scaling of the ions acceleration by high power electromagnetic waves in the radiation pressure dominated regime

E.Yu. Echkina1, I. N. Inovenkov1, T. Zh. Esirkepov2, F. Pegoraro3, M. Borghesi4, S. V. Bulanov2, 5

1 Faculty of Computational Mathematics and Cybernetics, Moscow State University, Moscow, Russia
2 Advanced Photon Research Center, JAEA, 8-1 Umemidai, Kizugawa, 619-0215 Kyoto, Japan
3 Physics Department and CNISM, University of Pisa, Largo Pontecorvo, 3, 56127 Pisa, Italy
4 School of Mathematics and Physics, The Queen's University of Belfast, Belfast, Northern Ireland, United Kingdom
5 A. M. Prokhorov Institute of General Physics, RAS, Vavilov street, 38, Moscow, Russia

When the laser pulse radiation pressure is dominant, the efficiency of the laser energy transformation into the energy of relativistic ions is very high. An analysis of the stability of a thin plasma slab accelerated by the radiation pressure shows that the onset of a Rayleigh-Taylor-like instability can lead to transverse bunching of the slab. At the nonlinear stage of the instability development the plasma slab breaks up into separated clumps, which are accelerated by the wave radiation pressure similarly to the cluster acceleration. An indication of the effect of radiation pressure on the bulk target ions is obtained in the experimental studies of plasma jets ejected from the rear side of thin solid targets irradiated by ultraintense laser pulses.The energy and luminosity scaling in the RPDA regime are presented.