Brygoo, Stéphanie (2006) Laser shocks on diamond, helium and hydrogen: an experimental study of the ''Warm Dense Matter''. PhD thesis DIF/DPTA/SPMC/LHPS, DIF/DPTA/SPMC/LHPS, EP/X p.206.
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Alternative Locations: http://www.imprimerie.polytechnique.fr/Theses/Files/Brygoo.pdf
Abstract
The determination of the equations of state of helium, hydrogen and diamond at very high density is an important problem at the frontier between condensed matter physics and plasma physics (also called "Warm Dense Matter" domain) and with important implications in planetary physics for understanding the formation of giant and extrasolar planets. Due to the limitations of the conventional techniques (static or single shock compression) for reaching the relevant densities of most of the interior of Jupiter, data are really scarce. Combining a static and a dynamical approach offers a new set of possibilities to explore phase diagrams. In these experiments, accurate !
measurements are essential to be able to compare with the vari!
ous theo ries. In this Ph'D work, a new metrology based on quartz as a reference material has been developed for this purpose. Precise pressure, temperature, density and reflectivity measurements can now be obtained. We will discuss results obtained on diamond (maximum on the melting curve), on helium (validation of Saumon-Chabrier model), on hydrogen (continuous transition between a non conducting and a conducting state) and on hydrogen/helium mixtures (no obvious sign of a phase transition).
| Item Type: | PhD Thesis (PhD) |
|---|---|
| Thesis Supervisor: | Loubeyre, Paul |
| Date: | November 2006 |
| Board of examiners: | Chabrier, Gilles and Boustie, Michel and Sette, Francesco and Koenig, Michel and Loubeyre, Paul |
| Ecole Doctorale: | ED 447 ECOLE DOCTORALE DE L'ECOLE POLYTECHNIQUE |
| Discipline: | DIF/DPTA/SPMC/LHPS |
| Collection (Fonds): | EP/X |
| Institution: | EP/X |
| Department: | DIF/DPTA/SPMC/LHPS |
| Subjects: | 3. Physics, Optics |
| Uncontrolled Keywords: | Equation of state, Laser shocks, Precompression, Diamond, Helium, Hydrogen, Quartz metrology, Warm dense matter, équatin d'état, Choc laser, Précompression, Diamant, Hélium, Hydrogène, Métrologie quartz, Warm dense matter |
Table of content
I Introduction
II Approche théorique
1 Comportement dynamique: les relations utiles
2 Quelques modèles pour décrire la matière
III Mise en place expérimentale
3 Chocs laser dans les cibles précomprimées
4 Mesure des vitesses de choc: technique VISAR
5 Une nouvelle métrologie: utilisation du quartz
6 Les lasers de puissance
IV Résultats
7 Diamant
8 Hélium
9 Hydrogène
10 Hydrogène/Hélium
V Conclusion
| ID Code: | 2088 |
|---|---|
| Deposited By: | Laurence Vidament |
| Deposited On: | 17 January 2007 |
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