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A High-Capacity Microwave SQUID Multiplexer Chip Screening System

March 21, 2023

Author(s)

Zachary Whipps, Jake A. Connors, Bradley Dober, Johannes Hubmayr, John Mates, Caleb Wheeler, John Groh, Jason Austermann, Leila Vale, Gene C. Hilton, Jiansong Gao, Shannon Duff, Joel Ullom, Ed Denison

The microwave SQUID multiplexer ($\mu$MUX) is a high channel-count multiplexer that, when coupled to low-temperature detectors such as Transition Edge Sensor (TES) Bolometers, has applications across astronomy and physics. Our primary application is for

On-Wafer Vector-Network-Analyzer Measurements at mK Temperatures

January 11, 2023

Author(s)

Elyse McEntee Wei, Richard Chamberlin, Nate Kilmer, Joshua Kast, Jake A. Connors, Dylan Williams

We describe a system for performing on-wafer vector-network-analyzer measurements from 100 MHz to 15 GHz at mK temperatures (i.e., less than 20 mK). We first demonstrate a camera-less probe positioning system and calibrate this system at 4.4 K. We then use

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