NIST - National Institute of Standards and Technology
05/25/2023 | Press release | Archived content
Improved microwave SQUID multiplexer readout using a kinetic-inductance traveling-wave parametric amplifier
Published
May 25, 2023
Author(s)
Maxime Malnou, John Mates, Michael Vissers, Leila R. Vale, Dan Schmidt, Douglas Bennett, JIANSONG GAO, Joel Ullom
Abstract
We report on the use of a kinetic-inductance traveling-wave parametric amplifier (KITWPA) as the first amplifier in the readout chain of a microwave superconducting quantum interference device (SQUID) multiplexer (\umux). This \umux} is designed to multiplex signals from arrays of low temperature detectors such as superconducting transition-edge microcalorimeters. When modulated with a periodic flux-ramp to linearize the SQUID response, the flux noise improves, on average, from $1.6$\,\microphinotrthz} with the KITWPA off, to $0.77$\,\microphinotrthz} with the KITWPA on. When statically biasing the \umux} to the maximally flux-sensitive point, the flux noise drops from $0.45$\,\microphinotrthz} to $0.2$\,\microphinotrthz. We validate this new readout scheme by coupling a transition-edge microcalorimeter to the \umux} and detecting background radiation. The combination of \umux} and KITWPAs provides a variety of new capabilities including improved detector sensitivity and more efficient bandwidth utilization.
Citation
Applied Physics Letters
Pub Type
Journals
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Keywords
parametric amplifier, microwave multiplexer, sensor readout
Citation
Malnou, M. , Mates, J. , Vissers, M. , Vale, L. , Schmidt, D. , Bennett, D. , Gao, J. and Ullom, J. (2023), Improved microwave SQUID multiplexer readout using a kinetic-inductance traveling-wave parametric amplifier, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936356 (Accessed May 27, 2023)