  We draw attention to recent high explosive (HE) experiments which provide
compression of macroscopic amount of matter to high, even record, values of
pressure in comparison with other HE experiments. The observed bounce after the
compression corresponds to processes in core-collapse supernova explosions
after neutrino trapping. Conditions provided in the experiments resemble those
in core-collapse supernovae, permitting their use for laboratory astrophysics.
A unique feature of the experiments is compression at low entropy. The values
of specific entropy are close to those obtained in numerical simulations during
the process of collapse in supernova explosions, and much lower than those
obtained at laser ignition facilities, another type of high-compression
experiment. Both in supernovae and HE experiments the bounce occurs at low
entropy, so the HE experiments provide a new platform to realize some supernova
collapse effects in laboratory, especially to study hydrodynamics of collapsing
flows and the bounce. Due to the good resolution of diagnostics in the
compression of macroscopic amounts of material with essential effects of
nonideal plasma in EOS, and observed development of 3D instabilities, these
experiments may serve as a useful benchmark for astrophysical hydrodynamic
codes.
