Description
This presentation focuses on the three-dimensional (3D) numerical simulation of an indirect drive baffled hohlraum experiment conducted in 2022 at the Laser MégaJoule (LMJ) facility.
The baffled geometry, used at both the Omega facility at the University of Rochester and the LMJ, aims to create a homogeneous radiation environment in the central compartment of the target for equation of state measurements. However, this study focuses solely on x-ray conversion in the different compartments.
In the experiment of interest, a gold target was driven by 24 beams of the LMJ laser, and two radiative temperature measurements were conducted: one from the laser entrance hole (LEH) and another from a hole in the central compartment.
Traditionally, the restitution of the second measure involves two-chained 2D simulations, which can lead to numerical difficulties and potential errors or approximations that require vigilance.
With advancements in simulation capabilities, the TROLL code [1] is employed to perform 3D simulations with precise modeling of laser-plasma interactions and target hydrodynamics. These all-in-one simulations enable direct restitution of the radiative temperature. By refining the target geometry, particularly the central hole, we achieved accurate restitution of both radiative temperature measurements in a single simulation.