Author/Authors :
Cowan، نويسنده , , T.E. and Roth، نويسنده , , M. and Johnson، نويسنده , , J. and Brown، نويسنده , , C. and Christl، نويسنده , , M. and Fountain، نويسنده , , W. and Hatchett، نويسنده , , S. and Henry، نويسنده , , E.A. and Hunt، نويسنده , , A.W. and Key، نويسنده , , M.H. and MacKinnon، نويسنده , , A. and Parnell، نويسنده , , T. H. Pennington، نويسنده , , D.M. and Perry، نويسنده , , M.D. and Phillips، نويسنده , , T.W. and Sangster، نويسنده , , T.C. and Singh، نويسنده , , M. and Snavely، نويسنده , , R. and Stoyer، نويسنده , , M. and Takahashi، نويسنده , , Y. and Wilks، نويسنده , , S.C. and Yasuike، نويسنده , , K.، نويسنده ,
Abstract :
Recent experiments at the LLNL Petawatt Laser have demonstrated the generation of intense, high-energy beams of electrons and ions from the interaction of ultra-intense laser light with solid targets. The focused laser intensities are as high as 6×1020 W/cm2, at which point the quiver energies of the target electrons extend to ∼10 MeV. In this new, fully relativistic regime of laser–plasma interactions, nuclear processes become important and nuclear techniques are required to diagnose the high-energy particle production. We describe recent experiments in which we have observed electrons accelerated to 100 MeV, photo-nuclear fission, positron–electron pair creation, monoenergetic electron jets and intense beams of protons emitted from the back surface of a laser-irradiated target.
