高压物理学报2026，Vol.40Issue(6)：1-12,12.DOI:10.11858/gywlxb.20261060
面向宽相区状态方程研究的6.2 GPa高预压静-动加载实验技术
Development of a 6.2 GPa Precompressed Static-Dynamic Compression Technique for Wide-Range Equation-of-State Investigations
摘要
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 represen-tative 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.关键词
冲击波/状态方程/金刚石压砧/静-动加载/温稠密物质Key words
shock waves/equation of state/diamond anvil cell/static-dynamic compression/warm dense matter分类
数理科学引用本文复制引用
马诩洋,涂昱淳,贺芝宇,贾果,方智恒,王佩佩,黄秀光..面向宽相区状态方程研究的6.2 GPa高预压静-动加载实验技术[J].高压物理学报,2026,40(6):1-12,12.基金项目
挑战专题(TZ2025013) （TZ2025013）
国家自然科学基金(12304033) （12304033）
