RT info:eu-repo/semantics/article
T1 Hydrodynamic conditions in laser irradiated buried layer experiments
A1 Frank, Yechiel
A1 Kemp, Gregory E.
A1 Marley, Edward V.
A1 Foord, Mark E.
A1 Schneider, Marilyn B.
A1 Ehrlich, Yosi
A1 Fraenkel, Moshe
A1 Pérez Callejo, Gabriel
AB The calculation of open shell ionization level and radiative properties of materials in Non-Local Thermal Equilibrium (NLTE) is currently still a major challenge for any atomic model. The predictions of various NLTE atomic codes at these conditions still differ significantly. In recent years, a new buried layer platform was developed at the Lawrence Livermore National Laboratory and the Laboratory for Laser Energetics. This platform is used to measure ionization distribution and emission of open L-shell, mid-Z ions and open M-shell, high-Z ions at NLTE conditions that are relevant in many laser plasma applications. These experiments offer a unique chance for benchmarking the atomic models. In order to perform these experiments, a uniform well characterized plasma source is required. In this work, we present one-dimensional (1D) and two-dimensional simulations of the experimental platform. These simulations were used for both the design and the analysis of the experiments. The simulations demonstrate the different phases of hydrodynamic evolution of the target and identify the time windows in which uniform conditions can be achieved. A 1D expansion of the target was found to be adequate to describe the target's evolution for most of the experiment duration. The fast 1D simulations were compared with recent experimental results from the Omega laser facility. The sensitivity of the results to several modeling parameters such as the electron flux limiter and laser resonant absorption is reported.
PB American Institute of Physics
SN 1070-664X
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/64392
UL https://uvadoc.uva.es/handle/10324/64392
LA eng
NO Physics of Plasmas, Junio 2020, vol. 27, p. 063301
NO Producción Científica
DS UVaDOC
RD 17-jul-2024