Progress in indirect drive hohlraum design for laser ICF. Self-generated magnetic field and non-local heat flux : simulation with 2D radiation-hydrodynamic code and experimental validation

In indirect drive scheme, the laser light is converted in X-rays in a hohlraum made of a high-Z material. Part of this radiation flux is absorbed by a microballoon, filled with DT, and placed in the center of the hohlraum, leading to its implosion, ignition and burn. The right control of radiation fluxes, spectrum and energy, is then an issue for the LMJ target design. The presentation will give the status of our knowledge and last improvements in our codes to reproduce at best hohlraum energetics. Validation of our simulations is ensured by a large experimental program. Hohlraum energetics cover two themes : radiation energy and flux characterization inside the hohlraum,