Measurements of deep heating generated by ultra-intense laser-plasma interactions

摘要

We measure 300 eV thermal temperatures at near-solid densities by x-ray211u001espectroscopy of tracer layers buried up to 30 pm inside CH slabs which are 211u001eirradiated by a 0.5 kJ, 5 ps laser. X-ray imaging data suggest that collimated 211u001eelectron transport produces comparable temperatures as deep as 200 pm, and 211u001eunexpectedly show the heated regions to be 50-120 pm-diameter rings. The data 211u001eindicate that intense lasers can directionally heat solid matter to high 211u001etemperatures over large distances; the results are relevant for fast-ignition 211u001einertial-confinement fusion and hot, dense plasma research