Integration of a 4-Stage 4 K Pulse Tube Cryocooler Prototype With a Superconducting Integrated Circuit


A custom-designed laboratory prototype of a four-stage Stirling-type pulse tube cryocooler was recently developed by Lockheed Martin for niobium integrated circuits (ICs) operating close to 4 K. Basic system performance has been verified by integration with a Nb IC test chip, with cells that include a high-speed rapid single flux quantum (RSFQ) binary… (More)

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