학술논문
Coupling static and dynamic compressions: first measurements in dense hydrogen.
Document Type
Article
Author
Source
Subject
*HYDROGEN analysis
*METALLURGY
*DENSITY functionals
*HIGH pressure (Science)
*OPTICAL properties
*FLUID dynamics
*
*
*
*
*
Language
ISSN
0895-7959
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. [ABSTRACT FROM AUTHOR]