Thermodynamic properties of a nonideal helium plasma at quasi-isentropic compression by a factor of 575 at a pressure of 3000 GPa

Dynamics of supernova bounce in laboratory

“…As a result, one can ensure that at certain stages of the steel shell -pusher compression the thermodynamic trajectory of the compressed gas (which mimics the "collapse" of a supernova core) enters the region of the soft EOS corresponding to a combined dissociation-ionization-driven ("plasma") phase transition at P ∼ 1 − 2 Mbar with the density jump ∼ 15 − 20%. This phase transition was discovered in explosive experiments about a decade ago [24] and has been many times confirmed [9,16,25,26]. It should be stressed that some first indications on the possible existence of another ionization-driven phase transition with a very high value of the density jump are obtained at pressure P ∼ 50 − 100 Mbar in the latest high-explosive experiments [9], see details in Sec.…”

“…At a ratio of the initial gas pressures in the inner and outer cavities ≈ 1 : 9 with such a construction, a helium plasma was compressed in Ref. [25] by a factor of 600 with pressure P ≈ 3000 GPa. A spherical device similar to that described in Ref.…”

Nonmetal‐to‐metal transition in dense fluid helium

“…A multitude of experiments aimed to determine the EOS and the electrical conductivity of hydrogen, helium, and other elements and compounds via sophisticated explosively driven shock-wave experiments. [7][8][9][10][11][12][13][14] Other experiments on the metallization of dense fluid hydrogen were performed with gas guns, [15] Sandia's Z machine, [16] and high-power lasers such as National Ignition Facility, [17] and in the solid phase using diamond anvil cells. [18] The exact location of the metallization transition in solid and liquid hydrogen is still under lively debate.…”

Diagnostics and Production of Warm Dense Matter with Multishock Reverberation Compression Technique

“…Recent technical advances, experimental capabilities and facilities make it possible to create and confine of warm dense states of matter in the laboratory [2] and advanced diagnostics required for the characterization and interrogation of such states [3]. These experimental capabilities include radiation-synchrotron sources [4], energetic materials [5][6][7][8], high power lasers [9][10][11][12][13][14][15][16], particle beams [17,18], Z-pinch devices [19][20][21][22][23], and mechanical impact techniques such as utilized in gas-gun launchers [24][25][26][27][28]. WDM is an important state of the evolution and presence of matters in inertial confinement fusion (ICF) and heavy-ion fusion [29].…”