Time-Resolved Observation of Ultrahigh Intensity Laser-Produced Electron Jets Propagating through Transparent Solid Targets by Gremillet, L, Amiranoff, F, Baton, S, Gauthier, J, Koenig, M, Martinolli, E, Pisani, F, Bonnaud, G, Lebourg, C, Rousseaux, C, Toupin, C, Antonicci, A, Batani, D, Bernardinello, A, Hall, T, Scott, D, Norreys, P, Bandulet, H, Pépin, H