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-24-0812
Direction
DAM
Thesis topic details
Category
Theoretical physics
Thesis topics
Kinetic description of laser-plasma interaction relevant to inertial confinement fusion
Contract
Thèse
Job description
Many applications, such as inertial confinement fusion, require an understanding of the physical mechanisms involved when high-energy laser beams propagate in a plasma. In particular, in the case of fusion, the aim is to quantify the deposition of laser energy on a cryogenic deuterium-tritium target, and the efficiency with which this target can be compressed to trigger fusion reactions. However, during their propagation, laser beams create a plasma wave that grows at the expense of the incident laser energy. However, the growth of this wave is not infinite and stops when the wave breaks up. This is accompanied by the production of hot electrons, which can preheat the target and hinder its compression. The breaking of a plasma wave is a physical phenomenon of the kinetic type, which can only be correctly described by calculating the velocity distribution of the electrons in the plasma. The aim of this thesis is to study wave breaking both theoretically and numerically, using Vlasov-type kinetic codes. One of the main difficulties lies in the discontinuity of the distribution functions to be described. In addition, it is necessary to describe the surge from its linear phase to the non-linear regime, enabling the creation of hot electrons to be quantified. The ultimate goal of the thesis is to produce models that are simple enough to run on the CEA's dimensioning codes.
University / doctoral school
Ondes et Matière (EDOM)
Paris-Saclay
Thesis topic location
Site
DAM Île-de-France
Requester
Person to be contacted by the applicant
BÉNISTI Didier didier.benisti@cea.fr
CEA
DAM/DPTA
CEA-DAM Ile de France
91297 Arpajon Cedex
01 69 26 40 00
Tutor / Responsible thesis director
BÉNISTI Didier didier.benisti@cea.fr
CEA
DAM/DPTA
CEA-DAM Ile de France
91297 Arpajon Cedex
01 69 26 40 00
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