First radiative shock experiments on the SG-II laser
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
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 $\sim$40 km/s shock inside a gas-cell filled with argon
at an initial pressure of 1 bar. The use of gas-cell targets with large
(several mm) lateral and axial extent allows the shock to propagate freely
without any wall interactions, and permits a large field of view to image
single and colliding counter-propagating shocks with time resolved,
point-projection X-ray backlighting ($\sim20$ $\mu$m 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 non-uniformities in the
shock apex. These results are compared with experiments looking at
counter-propagating shocks, showing a symmetric drive which leads to a
collision and stagnation from $\sim$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.
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 $\sim$40 km/s shock inside a gas-cell filled with argon
at an initial pressure of 1 bar. The use of gas-cell targets with large
(several mm) lateral and axial extent allows the shock to propagate freely
without any wall interactions, and permits a large field of view to image
single and colliding counter-propagating shocks with time resolved,
point-projection X-ray backlighting ($\sim20$ $\mu$m 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 non-uniformities in the
shock apex. These results are compared with experiments looking at
counter-propagating shocks, showing a symmetric drive which leads to a
collision and stagnation from $\sim$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.
Date Issued
2021-06-04
Date Acceptance
2021-03-25
Citation
High Power Laser Science and Engineering, 2021, 9
ISSN
2095-4719
Publisher
Cambridge University Press
Journal / Book Title
High Power Laser Science and Engineering
Volume
9
Copyright Statement
© The Author(s), 2021. Published by Cambridge University Press in association with Chinese Laser Press. This is an Open Access article, distributed underthe terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, andreproduction in any medium, provided the original work is properly cited.
License URL
Identifier
http://arxiv.org/abs/2103.17052v1
Subjects
physics.plasm-ph
physics.plasm-ph
Notes
16 pages, 5 figures, accepted for publication in High Power Laser Science and Engineering (25 March 2021)
Publication Status
Published
Article Number
ARTN e27
Date Publish Online
2021-06-04