Stopping powr models for low-energy ion beams and implications for HIF targets

摘要

Summary form only given. Ion beam drivers for HEDP and ICF experiments have a number of advantages, including the ability to heat macroscopic targets at high repetition rates. Current and future experiments depend on accurate numerical simulations of beam-solid interactions to further the development of targets and experimental programs. We have recently developed a number of numerical models of ion-solid interactions in support of beam-driven HEDP and WDM experiments, including alternative stopping power models that are more accurate for low-energy beams. We have implemented these models into the stand alone numerical library TxPhysics, and provide multi-language interfaces as well as an interactive web interface. We present here comparisons between these stopping power models and the classical Bethe-Bloch energy deposition model using the radiation/hydrodynamics simulation code HYDRA. We find that proper inclusion of nuclear stopping has significant implications on the evolution of target density and velocity for beams with energies near and below the Bragg peak.