Laser energy deposition in relativistic interactions with underdense plasmas P. Chessa, M. Galimberti, A. Giulietti, D. Giulietti, L. A. Gizzi and P. Mora Eur. Phys. J. D, 8 2 (2000) 153-156 Published online: 15 February 2000 DOI: 10.1007/s10053-000-8803-3