Study of radiative shocks using 2D interferometry and XUV spectroscopy

0584825 - FZÚ 2025 RIV US eng J - Journal Article
Singh, R. L. - Stehlé, C. - Kozlová, M. - Cotelo, M. - Dostál, Jan - Dudžák, Roman - Rodriguez, R. - Velarde, P. - Barroso, P. - Suzuki-Vidal, F. - Pisarczyk, T.
Study of radiative shocks using 2D interferometry and XUV spectroscopy.
Physics of Plasmas. Roč. 31, č. 3 (2024), č. článku 033301. ISSN 1070-664X. E-ISSN 1089-7674
R&D Projects: GA MŠMT(CZ) LM2023068
Institutional support: RVO:68378271
Keywords : PALS facility * radiative shocks * 2D interferometry * XUV spectroscopy
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.2, year: 2022
Method of publishing: Open access

We report new experimental results on radiative shocks obtained in Xenon and Argon in gas cells at two different pressures below 1 bar. These shock waves are generated by the interaction of the PALS iodine laser on a CH–Au foil with a typical velocity in the range of 50–100 km/s depending on the variable laser intensity, pressure, and gas. Attention is paid to the morphology and the dynamics of the radiative precursor over large time scales up to 30 ns, using 2D sub-picosecond visible interferometry, illustrating the complex interplay of hydrodynamic and radiation absorption for different initial conditions. The comparison between 1D and 2D simulations confirms the role played by lateral radiative losses in the ionization wave and the necessity of state-of-the-art integrated opacities. This study is complemented by the first XUV analysis of the shock emission between 5 and 20 nm obtained with a grating spectrometer.
Permanent Link: https://hdl.handle.net/11104/0353412