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-heated 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, that features the largest modelling uncertainties, remains virtually unexplored. Here, we report proton energy-loss measurements in warm dense plasma at unprecedented low projectile velocities. Our energy-loss data, combined with a precise target characterization based on plasma-emission measurements using two independent spectroscopy diagnostics, demonstrate a significant deviation of the stopping power from classical models in this regime. In particular, we show that our results are in closest agreement with recent first-principles simulations based on time-dependent density functional theory.
Malko, S., Cayzac, W., Ospina-Bohórquez, V., Bhutwala, K., Bailly-Grandvaux, M., McGuffey, C., Fedosejevs, R., Vaisseau, X., Tauschwitz, An., Apiñaniz, J. I., De Luis Blanco, D., Gatti, G., Huault, M., Hernandez, J. A. Perez, Hu, S. X., White, A. J., Collins, L. A., Nichols, K., ... Volpe, L. (2022). Proton stopping measurements at low velocity in warm dense carbon. Nature Communications, 13(1). https://doi.org/10.1038/s41467-022-30472-8
@article{osti_1869477,
author = {Malko, S. and Cayzac, W. and Ospina-Bohórquez, V. and Bhutwala, K. and Bailly-Grandvaux, M. and McGuffey, C. and Fedosejevs, R. and Vaisseau, X. and Tauschwitz, An. and Apiñaniz, J. I. and others},
title = {Proton stopping measurements at low velocity in warm dense carbon},
annote = {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-heated 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, that features the largest modelling uncertainties, remains virtually unexplored. Here, we report proton energy-loss measurements in warm dense plasma at unprecedented low projectile velocities. Our energy-loss data, combined with a precise target characterization based on plasma-emission measurements using two independent spectroscopy diagnostics, demonstrate a significant deviation of the stopping power from classical models in this regime. In particular, we show that our results are in closest agreement with recent first-principles simulations based on time-dependent density functional theory.},
doi = {10.1038/s41467-022-30472-8},
url = {https://www.osti.gov/biblio/1869477},
journal = {Nature Communications},
issn = {ISSN 2041-1723},
number = {1},
volume = {13},
place = {United Kingdom},
publisher = {Nature Publishing Group},
year = {2022},
month = {05}}
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Organization:
Canadian Natural Sciences and Engineering Research Council; European Union; ICTS Equipment; IMPULSE; Junta de Castilla y León; LASERLAB-EUROPE V; LaserLab Europe IV; National Science Foundation (NSF); PALMA; USDOE; USDOE National Nuclear Security Administration (NNSA)
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 480, Issue 1https://doi.org/10.1016/S0168-9002(01)02100-3
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 733https://doi.org/10.1016/j.nima.2013.05.097