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Engineering features are known to cause jets of ablator material to enter thefuel hot-spot in inertial confinement fusion implosions. The Biermann batterymechanism wraps them in self-generated magnetic field. We show that higher-Zjets have an additional thermoelectric magnetic source term that is not presentfor hydrogen jets, verified here through a kinetic simulation. It has similarmagnitude to the Biermann term. We then include this in an extendedmagneto-hydrodynamics approach to post-process an xRAGE radiation-hydrodynamicimplosion simulation. The simulation includes an accurate model for the capsulefill tube, producing a dense carbon jet that becomes wrapped in a 4000Tmagnetic field. A simple spherical carbon mix model shows that this insulatesthe electron heat conduction enough to cause contraction of the jet to anoptically thick equilibrium. The denser magnetized jet hydrodynamics couldchange its core penetration and therefore the final mix mass, which is known tobe well correlated with fusion yield degradation. Fully exploring this willrequire self-consistent magneto-hydrodynamic simulations. Experimentalsignatures of this self-magnetization may emerge in the high energy neutronspectrum.

Magnetization around mix jets entering inertial confinement fusion fuel