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Feasibility of self-stabilized superconducting cables cooled with He II

By: Kobayashi, H.; Uchida, M.;

1992 / IEEE


This item was taken from the IEEE Periodical ' Feasibility of self-stabilized superconducting cables cooled with He II ' The fountain effect induced by heat dissipation in a superconducting composite sweeps away the warmed He II so that the liquid temperature surrounding the normal spot is maintained such that it never reaches the saturated vapor pressure or the lambda -line. To study the feasibility of a self-stabilized superconducting cable based on this principle, the authors have investigated how the superflow raises the critical heat flux Q/sub c/ (of superfluidity) by means of a flexible superleak filter. It is shown that not only Q/sub c/ but also the peak heat flux to the film boiling state can be considerably increased by superflow. In the confined space of a cooling channel, the superflow is expected to dominate the heat transport rather than the Gorter-Mellink conduction known to exist in compact windings in superconducting magnets.<>