Measurements of Ion Stopping Around the Bragg Peak in High-Energy-Density Plasmas

Abstract

For the first time, quantitative measurements of ion stopping at energies around the Bragg peak (or peak ion stopping, which occurs at an ion velocity comparable to the average thermal electron velocity), and its dependence on electron temperature (Te) and electron number density (ne) in the range of 0.5-4.0 keV and 3×1022 to 3×1023 cm-3 have been conducted, respectively. It is experimentally demonstrated that the position and amplitude of the Bragg peak varies strongly with Te with ne. The importance of including quantum diffraction is also demonstrated in the stopping-power modeling of high-energy-density plasmas.