Advancing Magnetized Target Fusion by Solving an Inverse Problem with COMSOL Multiphysics

General Fusion's Magnetized Target Fusion approach involves compressing a spherical tokamak plasma using COMSOL Multiphysics software in the LM26 fusion demonstration. The software initially modeled the compression of small-scale lithium rings and cylinders, validated against experimental data. To address challenges in adjusting plasma equilibrium characteristics during compression, a Bayesian inference reconstruction process was used. This process involved recreating the compression sequence using COMSOL models, constrained by experimental measurements, to provide precise boundary conditions for internal MHD solvers. The goal is to reach a plasma temperature of 1 keV with a future target of 10 keV.