Modeling of Laser Heated Gases Including MHD*

This presentation expands upon a general session talk for the MIF audience. Magnetic field effects in laser heated gases are examined in two and three dimensions utilizing the HYDRA code. HYDRA features a full 3D MHD package including anisotropic thermal conduction, as well as the Nernst/Ettingshausen and Righi-Leduc terms. Results of 2D and 3D calculations are presented at the Z-Beamlet (2-4 kJ) and the NIF (single quad) scale (> 20 kJ). A key signature of magnetization during preheat, is higher electron temperature due to restriction of thermal conduction. With B_z the fuel is magnetized as it is heated, then quickly cools as a blast wave develops, limiting thermal conduction effects.  Both 2D and 3D simulations show the potential for whole beam self-focusing and steering from thermal effects, that could lead to laser induced mix. General implications for MagLIF are discussed.