DIAGNOSTICS FOR ENERGETIC CHARGED PARTICLES RELATED TO FAST IGNITOR EXPERIMENTS

摘要

The PWM laser has illuminated the CD shell target, imploded by GXII twelve beams. The laser-generated deuteron beams interact with the cold deutrons within the 4x critical density sphere and enhance ten times the D-D neutron yield. The energetic protons, emitted from the rear surface of the ultra-intense laser illuminated CH foils. The protons are dragged away from the rear surface, where the hot electrons formed a virtual cathode. For 5 (and 100) μm thick target, 1.8 (and 1.2) x10 protons have an average energy of 3 (and 2) MeV. Coaxial ring structure of protons shows B_θ · D to be 1000 (500) MG·μm. The 2D PIC simulation is close to the experiment. The energetic protons originate from the rear side acceleration. The magnetic fields grew and extended with the plasma expansion at the target rear side. These toroidal quasistatic magnetic fields, whose intensity is up to several tens megagauss, defocus the proton beams. The World biggest Petawatt Laser has constructed. The out put is 1 petawatt, which is used also for ultra-intense laser matter interactions above the intensity of 10 W/cm~2.