Electrical and electronic equipment often requires thermally effective heat intercept connections that provide electrical isolation. Such connections can be developed by clamping, with a thermal-interference fit, an electrically insulating cylindrical tube between a central disk and an outer ring. Heat flows radially through the disk-tube-ring assembly. Thermal effectiveness, i.e., ΔT for a given heat flux, and electrical isolation are controlled by tube geometry and material and by details of the connection assembly. Connections of this type are being developed as cryogenic heat intercepts for electrical leads that include high-temperature superconductors. In this paper, we discuss the design considerations and details of a heat intercept connection that transfers a 45-W thermal load at 60 K with a ΔT of ≈ 10 K while providing 7.5-kV electrical isolation. In addition, we report results obtained while evaluating prototype heat intercept connections for thermal and electrical performance.
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