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Coupling static and dynamic compressions: first measurements in dense hydrogen |
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| Authors: | P Loubeyre P M Celliers D G Hicks E Henry A Dewaele J Pasley |
| Institution: | 1. Département de Physique Théorique et Applications, CEA , Commissariat à l'Energie Atomique , 91680, Bruyères-le-Chatel, France paul.loubeyre@cea.fr;3. Lawrence Livermore National Laboratory , P.O. Box 808, Livermore, CA, 94551, USA;4. Dipartimento di Fisica , Universita di Milano-Biocca , 20126, Milan, Italy;5. Département de Physique Théorique et Applications, CEA , Commissariat à l'Energie Atomique , 91680, Bruyères-le-Chatel, France;6. Central Laser Facility CLRC Rutherford Appleton Laboratory , Chilton , Didcot, OX11 0QX, UK |
| Abstract: | We demonstrate here a laser-driven shock wave in a hydrogen sample, pre-compressed in a diamond anvil cell. The compression factors of the dynamic and static techniques are multiplied. This approach allows access to a family of Hugoniot curves which span the P–T phase diagram of fluid hydrogen to high density. In this first-of-its-kind experiment, two hydrogen Hugoniot curves have been partially followed starting from pre-compression at pressures of 0.7?GPa and 1.2?GPa. Optical reflectance probing at two wavelengths reveals the onset of the conducting fluid state. The boundary line to conducting fluid hydrogen is suggested. |
| Keywords: | Hydrogen Shock compression Metallization |