Shock Compression of Pre-Compressed Water: Towards the 300 K Isotherm with a Novel Diamond Anvil Cell
            
                编号:177
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                                    更新:2025-04-08 10:54:35                浏览:257次
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                摘要
                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. 
 
             
            
                关键词
                EoS, DAC, laser-driven shcoks, water in extreme conditions
             
            
            
                    稿件作者
                    
                        
                                    
                                        
                                                                            
                                    BataniDimitri
                                     France; CNRS;Universite Bordeaux; CEA; CELIA; Talence
                                
                                             
                          
    
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