HYPRES is developing a prototype digital system comprising a Nb RSFQ analog-to-digital converter (ADC) and SiGe amplifiers on a commercial two-stage cryocooler. This involves the detailed thermal, electrical, and mechanical design of the ADC chip mount, input/output (I/O) cables, and electromagnetic shielding. Our objective is to minimize the heat load on the second (4 K) stage of the cryocooler, in order to ensure stable ADC operation. The design incorporates thermal ...
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