Ion acceleration in ultra-high contrast regime A. Lévy, T. Ceccotti, H. Popescu, F. Réau, P. D'Oliveira, P. Monot, Ph. Martin, J. P. Geindre and E. Lefebvre Eur. Phys. J. Special Topics, 175 (2009) 111-116 Published online: 07 August 2009 DOI: 10.1140/epjst/e2009-01126-3