Optimization of Laser Irradiation Uniformity for the Double-Cone Ignition Scheme with MULTI-3D simulations

TL;DR

This paper uses 3D simulations and Bayesian optimization to improve laser irradiation uniformity in double-cone fusion schemes, achieving less than 5% nonuniformity.

Contribution

It introduces a novel optimization approach for laser beam pointing in double-cone schemes using MULTI-3D simulations, enhancing uniformity.

Findings

Achieved laser irradiation nonuniformity below 5%.

Demonstrated effectiveness of Bayesian optimization in laser scheme design.

Provided insights applicable to other laser fusion configurations.

Abstract

The double-cone ignition (DCI) scheme holds a promising perspective for laser driven fusion energy and astrophysics. However, optimizing the laser irradiation uniformity under the constraints of limited laser beams and a given cone angle remains to be explored. We utilized the three-dimensional radiation hydrodynamics program MULTI-3D to simulate the interaction process between the laser and plasma shell. By employing Bayesian optimization for the pointing position of the incident laser beams, we achieved a laser irradiation scheme with nonuniformity less than 5%. This study can provide references for experiments and offer valuable insights for other laser fusion schemes.