Favorable Collisional Demixing of Ash and Fuel in Magnetized Inertial Fusion*

Magnetized inertial fusion experiments are approaching regimes where the radial transport is dominated by collisions between magnetized ions, providing an opportunity to exploit effects usually associated with steady-state magnetic fusion. In particular, the low-density hotspot characteristic of magnetized liner inertial fusion (MagLIF) results in diamagnetic and thermal frictions which can demix thermalized ash from fuel, accelerating the fusion reaction. A simple diffusion model shows that increases in the fusion energy yield on the order of 5-10% are in fact possible. Our results could also be relevant for magnetic target fusion. Effects due to pressure anisotropy may also be discussed.