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

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...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2023-02, Vol.136 (2), p.227-240
Main Authors: Zhernokletov, M. V., Manachkin, S. F., Davydov, N. B., Raevskii, V. A., Blikov, A. O., Panov, K. N., Ryzhkov, A. V., Arinin, V. A., Tkachenko, B. I., Logvinov, A. I., Degtyarev, A. V., Komrakov, V. A., Davydov, A. I., Anashkin, N. N., Khrustalev, V. V.
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Compression ratio
Deuterium
Elementary Particles
Equations of state
Experiments
Explosive compacting
Gas density
Gases
Helium
Nonlinear
Parameters
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theory
Relativity Theory
Soft Matter Physics
Solid State Physics
Specific gravity
Statistical
Steel structures
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Summary: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 P mean ≈ 4.9 TPa at a density ρ max ≈ 6.4 g/cm 3 and the compression ratio is δ = ρ/ρ 0 ≈ 320; in another experiment, P mean ≈ 10.9 TPa, ρ max ≈ 10.3 g/cm 3 , and δ ≈ 470. For deuterium, these parameters are P mean ≈ 3.4 TPa, ρ max ≈ 6.0 g/cm 3 , and δ ≈ 162 in one experiment and P mean ≈ 13.3 TPa, ρ max ≈ 11.4 g/cm 3 , 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.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776123020139