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Quasi-Isentropic Compression of Gaseous Helium and Deuterium in Spherical Structures at Terapascal Pressures

  • STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS
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Abstract

The results of four experiments on studying preliminarily statically compressed gaseous helium and deuterium during their subsequent compression in explosive spherical cascade structures providing quasi-isentropic gas compression are presented. For helium, the following parameters were achieved: in one experiment, the compression pressure is Pmean ≈ 4.9 TPa at a density ρmax ≈ 6.4 g/cm3 and the compression ratio is δ = ρ/ρ0 ≈ 320; in another experiment, Pmean ≈ 10.9 TPa, ρmax ≈ 10.3 g/cm3, and δ ≈ 470. For deuterium, these parameters are Pmean ≈ 3.4 TPa, ρmax ≈ 6.0 g/cm3, and δ ≈ 162 in one experiment and Pmean ≈ 13.3 TPa, ρmax ≈ 11.4 g/cm3, and δ ≈ 520 in another experiment. The gas density was determined by an X-ray method using the position of the boundaries of the steel shells compressing a gas. The experiments are simulated with a one-dimensional gasdynamic software package, in which the Kopyshev–Khrustalev equations of state are used for the gases under study. The pressures are determined using calculations, in which the dynamics of gas compression is satisfactorily simulated for the entire set of experiments.

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Notes

  1. This mass is located at a distance more than R02/3, where R0 is the initial gas radius in the internal cascade before compression. The pressure at the SW front is from 0.5 to 1.5 GPa.

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ACKNOWLEDGMENTS

We are grateful to R.V. Borisov, E.P. Volkov, S.E. Elfimov, S.Yu. Sogrin, D.P. Turutin, A.V. Buchirin, R.V. Til’kunov, A.S. Sokolova, A.I. Gurkin, E.V. Shevnin, I.P. Maksimkin, and A.I. Lomaikin, who took part in organizing and conducting the experiments and processing the experimental data. We also thank M.A. Mochalov for providing the results of similar experiments.

Funding

The work was supported by the Ministry of Science and Higher Education of Russia (contract no. 075-15-2020-785 with the Joint Institute for High Temperatures of the Russian Academy of Sciences).

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Authors and Affiliations

  1. Russian Federal Nuclear Center (RFNC)—All-Russian Research Institute of Experimental Physics (VNIIEF), 607188, Sarov, Nizhny Novgorod oblast, Russia

    M. V. Zhernokletov, S. F. Manachkin, N. B. Davydov, V. A. Raevskii, A. O. Blikov, K. N. Panov, A. V. Ryzhkov, V. A. Arinin, B. I. Tkachenko, A. I. Logvinov, A. V. Degtyarev, V. A. Komrakov, A. I. Davydov, N. N. Anashkin & V. V. Khrustalev

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  1. M. V. Zhernokletov
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  2. S. F. Manachkin
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  15. V. V. Khrustalev
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Correspondence to N. B. Davydov.

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Translated by K. Shakhlevich

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Zhernokletov, M.V., Manachkin, S.F., Davydov, N.B. et al. Quasi-Isentropic Compression of Gaseous Helium and Deuterium in Spherical Structures at Terapascal Pressures. J. Exp. Theor. Phys. 136, 227–240 (2023). https://doi.org/10.1134/S1063776123020139

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