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186 / 2025-03-18 23:41:37
Shock Compression of Pre-Compressed Water: Towards the 300 K Isotherm with a Novel Diamond Anvil Cell
EoS, DAC, laser-driven shcoks, water in extreme conditions
高压物理与材料科学
摘要录用
BataniDimitri / France； CNRS；Universite Bordeaux； CEA； CELIA； Talence
The equation of state (EOS) of water under extreme conditions is a cornerstone of planetary science, shedding light on the interiors of ice-rich exoplanets and giant planets. In this work, the twelve-beams of the GXII facility at the Institute of Laser Engineering in Osaka were used at the at the HIPER (High-Intensity Plasma Experimental Research) chamber to drive a shock into precompressed water.  We used an innovative design for diamond anvil cells (DAC) including a perforated diamond which can allow reaching higher precompressions. In our experiment, we achieved precompressions between 1.7 and 4 GPa corresponding to ice phases VI and VII.

Our results show how this technical advancement potentially enables potential access to compression curves approaching the H2O cold curve (T = 300 K).

2D hydro-radiative simulations of the laser-plasma interaction within the diamond conical perforation show that if the perforation is too narrow, the plasma stagnates within the cavity, which inhibits the generation of a high-pressure shock wave in the diamond.

 
重要日期

  • 会议日期

    05月12日

    2025

    至

    05月15日

    2025

  • 03月26日 2025

    初稿截稿日期

  • 04月30日 2025

    提前注册日期

  • 05月15日 2025

    注册截止日期

主办单位
北京应用物理与计算数学研究所
陕西师范大学
承办单位
陕西师范大学
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