Extended Magneto-hydrodynamic effects in MagLIF.

We present results from simulations of MagLIF experiments at Sandia National Laboratory, using a recently developed extended MHD version of the 3D Gorgon code which includes the full Braginskii form of Ohm’s law and associated magnetised heat flow. The effects of anisotropic magnetised heat flow on the early growth of perturbations through MHD and electro-thermal instabilities is examined. The contribution of the Hall term to expansion of surface plasma is also studied. Different perturbation sources including surface roughness, volumetrically distributed defects or inclusions, and desorbed gases are investigated. Anisotropic heat flow due to the helical field is also important within the fuel region during implosion and stagnation as is the effect of Righi-LeDuc heat flow in the presence of r-theta plane asymmetry. The role of the Nernst and Ettingshausen terms in exacerbating heat flow in the fuel-liner interface region and determining the optimal level of laser pre-heat is also examined.