Author/Authors :
Antici، نويسنده , , P. and Gaillard، نويسنده , , S. and Gremillet، نويسنده , , L. and Amin، نويسنده , , M. and Nakatsutsumi، نويسنده , , M. and Romagnani، نويسنده , , L. and Tampo، نويسنده , , M. and Toncian، نويسنده , , T. and Kodama، نويسنده , , R. and Audebert، نويسنده , , P. and Pépin، نويسنده , , H. and Willi، نويسنده , , O. and Borghesi، نويسنده , , M. and Cowan، نويسنده , , T. and Fuchs، نويسنده , , J.، نويسنده ,
Abstract :
We have analyzed the acceleration of laser-generated protons, produced at the rear surface of flat-cone targets irradiated by an ultra-intense (I∼5×1019 W/cm2) short (400 fs) laser pulse. We used different target sizes and shapes in order to find the optimum target layout. We find that for targets with a too narrow cone structure, the production of the hot electrons, driving the proton acceleration, is located prior to the accelerating rear surface of the target, resulting in a reduced maximum proton energy.
