Analysis of microscopic properties of radiative shock experiments performed at the Orion laser facility

Abstract

In this work we have conducted a study on the radiative and spectroscopic properties of the radiative precursor and the post-shock region from experiments with radiative shocks in xenon performed at the Orion laser facility. The study is based on post-processing of radiation-hydrodynamics simulations of the experiment. In particular, we have analyzed the thermodynamic regime of the plasma, the charge state distributions, the monochromatic opacities and emissivities, and the specific intensities for plasma conditions of both regions. The study of the intensities is a useful tool to estimate ranges of electron temperatures present in the xenon plasma in these experiments and the analysis performed of the microscopic properties commented above helps to better understand the intensity spectra. Finally, a theoretical analysis of the possibility of the onset of isobaric thermal instabilities in the post-shock has been made, concluding that the instabilities obtained in the radiative-hydrodynamic simulations could be thermal ones due to strong radiative cooling.

Effect of laser remelting on microstructure and properties of two Ni-base coatings by supersonic particles deposition

“…The microstructure and composition of the coatings were analyzed using a Quanta 200 environmental scanning electron microscope (ESEM) and Oxford energy dispersive spectroscope (EDS) [34]. The phase structure was analyzed using a Bruker D8-Advance XRD system a Cu-Kα radiation source.…”

Editorial review of HPLSE special issue on laboratory astrophysics

“…The papers published in this special issue can be broadly grouped within the following main applications to laboratory astrophysics: magnetized plasmas and collisionless shocks [1][2][3][4][5] , supersonic, radiative plasma flows and hydrodynamic instabilities [6][7][8][9][10] , experimental diagnostic development [11,12] , and direct astrophysical applications [13] . In addition, there were three review papers [14][15][16] that give an in-depth study of current applications in the field.…”

“…[7], and a microscopic study of the formation of radiative shocks on Orion is presented in Ref. [8].…”