Temperature evolution of dense gold and diamond heated by energetic laser-driven aluminum ions

Abstract

Recent studies have shown that energetic laser-driven ions with some energy spread can heat small solid-density samples uniformly. The balance among the energy losses of the ions with different kinetic energies results in uniform heating. Although heating with an energetic laser-driven ion beam is completed within a nanosecond and is often considered sufficiently fast, it is not instantaneous. Here we present a theoretical study of the temporal evolution of the temperature of solid-density gold and diamond samples heated by a quasimonoenergetic aluminum ion beam. We calculate the temporal evolution of the predicted temperatures of the samples using the available stopping power data and the SESAME equation-of-state tables. We find that the temperature distribution is initially very uniform, which becomes less uniform during the heating process. Then, the temperature uniformity gradually improves, and a good temperature uniformity is obtained toward the end of the heating process.

Neutron yield scaling law in laser-cluster fusion experiments

“…These interactions induce the energy transfer from the hot ions to the electrons via ionization and excitation processes, resulting in the energy loss of the hot ions. These energy losses can be estimated by calculating the stopping powers, and we have used a Monte Carlo simulation code, SRIM [37][38][39], for these calculations. (See supplementary figures S3-S6 for details.)…”