Superconducting transmission lines for use in a He dilution refrigerator
نویسندگان
چکیده
We compare two superconducting transmission lines for use in a He dilution refrigerator using a NbTi wire inner conductor with NbTi foil and CuNi tubing outer conductors. The heat transfer is calculated using the Wiedermann-Franz Law, and the impedance and power loss are measured using a network analyzer at room temperature and at 4K. The transmission line with CuNi tubing is easy to construct, transfers little heat, and has an impedance closer to 50 Ω than the line with NbTi foil outer conductor.
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