Extension of Regimes of Applicability of Collisional Transport in Magnetized Multi-Ion Plasma

Collisional cross-field transport in magnetized multi-ion plasma exhibits curious effects such as charge incompressibility, ion stratification, and a novel heat pump.[1,2] We have extended cross-field transport response of plasma to a wider range with respect to collisional magnetization, which can be determined as the ratio of the light ion gyrofrequency to the collision frequency of light and heavy ion species. We have recovered previously known results that the heavy ions tend to concentrate in the low-temperature region of collisionally magnetized plasma and in the high-temperature region of collisionally unmagnetized plasma, respectively. Moreover, we have found the behavior of this effect in the intermediate regime of partially magnetized plasma.[3] The expansion of the range of validity of multi-ion collisional transport models makes them applicable to a wider range of laboratory plasma conditions. In particular, ion density profiles evolve sufficiently fast for radial impurity transport to be observable around stagnation on MagLIF, leading to expulsion of heavy ion impurities from the hotspot as long as plasma becomes sufficiently collisionally magnetized during the implosion.[3] In order to further expand the range of applicability of the corresponding transport models, we also identify the effects of collisional cross-field transport in partially ionized plasma, where ions are not fully ionized, as well as discuss their experimental implications.