Plasma Rotation As A Headwater Directive For Divertor Partition Closure

Foundational — This article, Plasma Rotation As A Headwater Directive For Divertor Partition Closure, formalizes a reusable flow-layer grammar for the divertor recycling asymmetry problem, improving on simulations by integrating core rotation and cross-field drift dynamics. This paper frames core rotation as a headwater directive that imprints a downstream deposition partition through a constrained translator path. The contribution enhances the predictability of divertor partition closure and strengthens design reasoning for divertor lifetime planning without overclaiming.