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Chinese Journal of High Pressure Physics  > 2026  > Corrected proof
MA Xuyang, TU Yuchun, HE Zhiyu, JIA Guo, FANG Zhiheng, WANG Peipei, HUANG Xiuguang. Development of a 6.2 GPa Precompressed Static-Dynamic Compression Technique for Wide-Range Equation-of-State Investigations[J]. Chinese Journal of High Pressure Physics. doi: 10.11858/gywlxb.20261060
Citation: MA Xuyang, TU Yuchun, HE Zhiyu, JIA Guo, FANG Zhiheng, WANG Peipei, HUANG Xiuguang. Development of a 6.2 GPa Precompressed Static-Dynamic Compression Technique for Wide-Range Equation-of-State Investigations[J]. Chinese Journal of High Pressure Physics. doi: 10.11858/gywlxb.20261060
shu

Development of a 6.2 GPa Precompressed Static-Dynamic Compression Technique for Wide-Range Equation-of-State Investigations

doi: 10.11858/gywlxb.20261060

  • Shanghai Institute of Laser Plasma, CAEP, Shanghai 201800, China

  • Received Date: 23 Mar 2026
  • Rev Recd Date: 20 Apr 2026
    • Available Online: 21 Apr 2026
    Abstract
  • The equation of state of materials under extreme pressure and temperature conditions is the important fundamental data in high energy density physics, planetary science, and inertial confinement fusion research. Traditional shock compression experiments are limited by the initial state of the sample and can usually only cover a limited thermodynamic region. In contrast, the static-dynamic compression technique combining static high pressure and laser-driven dynamic compression can significantly extend the accessible thermodynamic region by changing the initial density of the material. In this work, a high-precompression static-dynamic compression experimental technique for equation-of-state studies over a wide thermodynamic range is developed. By mechanically and optically optimizing the target structure of a Mini-Boehler-type diamond anvil cell (DAC), the static precompression level is successfully increased to as high as 6.2 GPa. The experiments are carried out on the SG-Ⅱ and SG-Ⅱ upgrade laser facilities, and velocity interferometer system for any reflector (VISAR) and a streaked optical pyrometer (SOP) are employed for high-precision diagnostics of the shock process. Meanwhile, under high-precompression conditions, corrections are applied to the standard material equation of state, refractive index, and release path in the impedance-matching method. The experimental results show that this technique significantly increases the initial density of the sample while maintaining good diagnostic signal quality, thereby extending the thermodynamic region accessible by shock compression experiments. Using water and deuterium as representative materials, the experimental data obtained from this platform show good agreement with theoretical models. The high-precompression static-dynamic compression experimental technique established in this work provides a new experimental approach for equation-of-state studies over a wide thermodynamic range.

     

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