Fueling limits in a cylindrical viscosity-limited reactor

Abstract

Recently, a method to achieve a "natural hot-ion mode" was suggested, by utilizing ion viscous heating in a rotating plasma with a fixed boundary. We explore the steady-state solution to the Braginskii equations and find the parameter regime in which a significant temperature difference between ions and electrons can be sustained in a driven steady state. The threshold for this effect occurs at ${\rho }_i\gtrsim 0.1R$. An analytic, leading order low flow solution is obtained, and a numerical, moderate Mach number $M\lesssim 2$ is investigated. The limitation is found to be at moderate Mach numbers.

arXiv comment24 pages, single column wide format, 3 figures

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