Back to Search
Start Over
Measurement of multiple physical parameters of dense gaseous hydrogen-deuterium mixture under double-shock compression: Evaluating theoretical models from multiple views
- Source :
- Applied Physics Letters. 115:231905
- Publication Year :
- 2019
- Publisher :
- AIP Publishing, 2019.
-
Abstract
- A series of reverberating shock experiments on the precompressed hydrogen-deuterium (H-D) mixture were performed by using a two-stage light gas gun, and an elaborately designed diagnostic configuration was presented to probe the multishock states of dense fluid H-D mixtures. The particular diagnostics allowed multiple physical parameters, including the equation of state (EOS), refractive index, reflectivity, molecular polarizability, and energy gap, of H-D mixtures under double-shock compression to be simultaneously determined in a single shot. The multiple parameters obtained provide a comprehensive evaluation for existing theoretical models from multiple perspectives. It is found that, compared with the semilocal Perdew–Burke–Ernzerhof xc functional, the EOS data predicted by a nonlocal van der Waals exchange-correlation (xc) functional (vdW-DF1) are in much better agreement with the experimental results. Furthermore, the commonly used Gladstone–Dale relation is not appropriate for describing the refractive index in high-pressure-temperature regions, and the refractive index and reflectivity can be well reproduced by the Heyd–Scuseria–Ernzerhof hybrid xc functional. These observations may provide insights into future theoretical developments and a better understanding of material properties under extreme pressure-temperature conditions.
- Subjects :
- 010302 applied physics
Equation of state
Materials science
Physics and Astronomy (miscellaneous)
Band gap
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
Computational physics
Shock (mechanics)
symbols.namesake
law
Polarizability
0103 physical sciences
Light-gas gun
symbols
van der Waals force
0210 nano-technology
Material properties
Refractive index
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 115
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........4cf4260f4ce64a6dc6db54a22ecab940