First radiative shock experiments on the SG-II laser

0546879 - FZÚ 2022 RIV GB eng J - Článek v odborném periodiku
Suzuki-Vidal, F. - Clayson, T. - Stehlé, C. - Chaulagain, Uddhab P. - Halliday, J.W.D. - Sun, M. - Ren, L. - Kang, N. - Liu, H. - Zhu, B. - Zhu, J. - De Almeida Rossi, C. - Mihailescu, T. - Velarde, P. - Cotelo, M. - Foster, J. M. - Danson, C.N. - Spindloe, C. - Chittenden, J.P. - Kuranz, C.
First radiative shock experiments on the SG-II laser.
High Power Laser Science and Engineering. Roč. 9, Jun (2021), č. článku e27. ISSN 2095-4719. E-ISSN 2052-3289
Grant CEP: GA MŠMT EF16_019/0000789
Grant ostatní: OP VVV - ADONIS(XE) CZ.02.1.01/0.0/0.0/16_019/0000789
Výzkumná infrastruktura: ELI Beamlines III - 90141
Institucionální podpora: RVO:68378271
Klíčová slova: high energy density physics * laboratory astrophysics * plasma physics * high-power laser * laser-driven shocks * experiments * X-ray backlighting * X-ray radiography
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 5.943, rok: 2021
Způsob publikování: Open access

We report on the design and first results from experiments looking at the formation of radiative shocks on the Shenguang II (SG-II) laser at the Shanghai Institute of Optics and Fine Mechanics in China. Laser-heating of a two-layer CH/CH–Br foil drives a ∼ 40 km/s shock inside a gas cell filled with argon at an initial pressure of 1 bar. The use of gas-cell targets with large (several millimeters) lateral and axial extent allows the shock to propagate freely without any wall interactions, and permits a large field of view to image single and colliding counter-propagating shocks with time-resolved, point projection X-ray backlighting (∼ 20 µm source size, 4.3 keV photon energy). Single shocks were imaged up to 100 ns after the onset of the laser drive, allowing to probe the growth of spatial nonuniformities in the shock apex. These results are compared with experiments looking at counter-propagating shocks, showing a symmetric drive that leads to a collision and stagnation from ∼ 40 ns onward. We present a preliminary comparison with numerical simulations with the radiation hydrodynamics code ARWEN, which provides expected plasma parameters for the design of future experiments in this facility.
Trvalý link: http://hdl.handle.net/11104/0323784