Efficient ion beam generation in laser interactions with micro-structured targets J. Limpouch, O. Klimo, J. Psikal, J. Proska, F. Novotny, D. Margarone, A. Velyhan, M. Cutroneo and L. Torrisi EPJ Web of Conferences, 59 (2013) 17011 Published online: 15 November 2013 DOI: 10.1051/epjconf/20135917011