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Shannon Duff (Fed)

Shannon Duff is an Electronics Engineer in the Quantum Sensors Group within the Quantum Electromagnetics Division of the Physical Measurement Laboratory at NIST in Boulder, CO.  Upon joining the Quantum Sensors Group in 2015, she began leading the development of micro-fabrication processes for densely packed, large-format arrays of superconducting transition edge sensor (TES) polarimeters for making precise measurements of the Cosmic Microwave Background (CMB).  This development has enabled many successful cosmological observations with NIST-fabricated detectors.  Shannon continues to lead millimeter-wave and far-infrared detector process development, while working toward realizing next-generation superconducting sensors for a variety of applications.

RESEARCH INTERESTS

  • Superconducting sensor arrays for Cosmic Microwave Background observations 
  • Development of ultra-low noise transition edge sensors for far infrared astrophysics
  • Micro-fabrication process development for next-generation superconducting readout and detectors (e.g., NIS-TES and SQUIDs on 150 mm wafers)

Awards

Publications

A High-Capacity Microwave SQUID Multiplexer Chip Screening System

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

Indium Bump Process for Low-Temperature Detectors and Readout

Author(s)
Tammy Lucas, John Biesecker, W.Bertrand (Randy) Doriese, Shannon Duff, Gene C. Hilton, Joel Ullom, Michael Vissers, Dan Schmidt
We describe our indium bump process for low-temperature detectors and associated readout. A titanium nitride under bump metallization layer (UBM) is reactively

Mitigating finite bandwidth effects in time-division- multiplexed SQUID readout of TES arrays

Author(s)
Malcolm Durkin, Joseph S. Adams, Simon Bandler, James A. Chervenak, Ed Denison, W.Bertrand (Randy) Doriese, Shannon Duff, Fred M. Finkbeiner, Joseph Fowler, Johnathon Gard, Gene C. Hilton, Ruslan Hummatov, Kent Irwin, Young I. Joe, Richard L. Kelley, Caroline A. Kilbourne, Antoine R. Miniussi, Kelsey Morgan, Galen O'Neil, Christine Pappas, Frederick S. Porter, Carl D. Reintsema, Kazuhiro Sakai, Stephen J. Smith, Robert W. Stevens, Daniel Swetz, Paul Szypryt, Joel Ullom, Leila R. Vale, Nicholas A. Wakeham
Time division multiplexing (TDM) is being developed as the readout technology of the X-ray integral field unit (X-IFU), a 3,168-pixel X-ray transition-edge
Created September 24, 2019, Updated October 11, 2023
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