Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationProton stopping measurements at low velocity in warm dense carbon
Malko, S.; Cayzac, W.; Ospina-Bohorquez, V.; Bhutwala, K.; Bailly-Grandvaux, M.; Fedosejevs, R.; McGuffey, C.; Vaisseau, X.; Tauschwitz, A.; Apinaniz, J. I.; Gatti, G.; de Luis, D.; Perez Hernandez, J. A.; Huault, M.; Hu, S. X.; White, A. J.; Collins, L. A.; Neumayer, P.; Faussurier, G.; Vorberger, J.; Prestopino, G.; Verona, C.; Santos, J. J.; Batani, D.; Beg, F.; Volpe, L.
Abstract
Ion stopping in warm dense matter is a process of fundamental importance for the understanding of the properties of dense plasmas, the realization and the interpretation of experiments involving ion beam-induced warm dense matter samples, and for inertial confinement fusion research. The theoretical description of the ion stopping power in warm dense matter is difficult notably due to electron coupling and degeneracy, and measurements are still largely missing. In particular, the low-velocity stopping range around the Bragg peak, that features the largest modelling uncertainties, remains virtually unexplored. Here, we report proton energy-loss measurements in warm dense plasma at lower projectile velocities than previous experiments, coming significantly closer to the Bragg peak region. Our energy-loss data, combined with a precise target characterization based on plasma temperature measurements us-
ing two different diagnostics, demonstrate a significant deviation of the stopping power from classical models in this regime. In particular, we show
that our results are consistent with recent first-principles simulations based on time-dependent density functional theory.
Keywords: stopping power; fusion
-
Nature Communications 13(2022), 2893
DOI: 10.1038/s41467-022-30472-8
Cited 20 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-33553
Years: 2023 2022 2021 2020 2019 2018 2017 2016 2015