General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DAM-25-0740
Direction
DAM
Thesis topic details
Category
Condensed Matter Physics, chemistry, nanosciences
Thesis topics
Measurement of the speed of sound in H2 and He, key components of gas giant interiors.
Contract
Thèse
Job description
The goal of this thesis is to study hydrogen-helium mixtures in the fluid phase under high pressure and high temperature using Raman and Brillouin spectroscopy. The experiments will be conducted in a diamond anvil cell with laser heating, allowing exploration of a wide range of pressure and temperature conditions representative of the interiors of gas giant planets (1-300 GPa, 300-4000 K). Raman spectroscopy will be used to probe possible chemical changes occurring under extreme conditions, while Brillouin spectroscopy will provide access to the adiabatic sound velocity and the equations of state of these fluid mixtures. These data will be particularly useful for improving the modeling of Jupiter and Saturn’s interiors.
University / doctoral school
La Physique, de la Particule à la Matière Condensée - Paris VI -
Sorbonne Université
Thesis topic location
Site
DAM Île-de-France
Requester
Position start date
01/09/2025
Person to be contacted by the applicant
Weck Gunnar 
gunnar.weck@cea.fr
CEA
DAM/DPTA//DPTA
CEA/DAM Ile de France
Bruyères-le-Châtel
91297 Arpajon Cedex
0169264000
Tutor / Responsible thesis director
LOUBEYRE Paul paul.loubeyre@cea.fr
CEA
DAM/DPTA//DPTA
CEA, DAM, DIF, F-91297 Arpajon, France
0169264000
En savoir plus
https://www-lmce.cea.fr/cond_matt_physics.html
