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Joel Weber (Assoc)

Joel Weber is a PREP Senior Research Associate in the Quantum Sensors Group at the National Institute of Standards and Technology (NIST) and the Department of Physics at the University of Colorado, Boulder. He currently conducts research on the design, fabrication, and testing of transition edge sensors for high-resolution x-ray spectroscopy with a focus on developing novel, bilayer detectors. Joel received his Ph.D. in Mechanical Engineering from the University of Colorado, Boulder followed by a National Research Council postdoctoral fellowship at NIST during which time his work centered on light-emitting nanowire probes for scanning tunneling microscopy and nanoscale lithography.

Research Interests

  • Transition Edge Sensor Microcalorimeters
  • Superconducting Switches for Multiplexing
  • Cleanroom Fabrication Process Development


A tabletop x-ray tomography instrument for nanometer-scale imaging: demonstration of the 1,000-element transition-edge sensor subarray

Paul Szypryt, Nathan J. Nakamura, Dan Becker, Douglas Bennett, Amber L. Dagel, W.Bertrand (Randy) Doriese, Joseph Fowler, Johnathon Gard, J. Zachariah Harris, Gene C. Hilton, Jozsef Imrek, Edward S. Jimenez, Kurt W. Larson, Zachary H. Levine, John Mates, Daniel McArthur, Luis Miaja Avila, Kelsey Morgan, Galen O'Neil, Nathan Ortiz, Christine G. Pappas, Dan Schmidt, Kyle R. Thompson, Joel Ullom, Leila R. Vale, Michael Vissers, Christopher Walker, Joel Weber, Abigail Wessels, Jason W. Wheeler, Daniel Swetz
We report on the 1,000-element transition-edge sensor (TES) x-ray spectrometer implementation of the TOMographic Circuit Analysis Tool (TOMCAT). TOMCAT combines

Expanding the Capability of Microwave Multiplexed Readout for Fast Signals in Microcalorimeters

Kelsey M. Morgan, Daniel T. Becker, Douglas A. Bennett, Johnathon D. Gard, Jozsef Imrek, John A. Mates, Christine G. Pappas, Carl D. Reintsema, Daniel R. Schmidt, Joel N. Ullom, Joel C. Weber, Abigail L. Wessels, Daniel S. Swetz
Microwave SQUID multiplexing has become a key technology for reading out large arrays of X-ray and gamma-ray microcalorimeters with mux factors of 100 or more

Demonstration of Athena X-IFU Compatible 40-Row Time-Division-Multiplexed Readout

Malcolm S. Durkin, Joseph S. Adams, Simon R. Bandler, James A. Chervenak, Saptarshi Chaudhuri, Carl S. Dawson, Edward V. Denison, William B. Doriese, Shannon M. Duff, F. M. Finkbeiner, C. T. FitzGerald, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, Kent D. Irwin, Young I. Joe, R. L. Kelley, Caroline A. Kilbourne, A. R. Miniussi, Kelsey M. Morgan, Galen C. O'Neil, Christine G. Pappas, F. S. Porter, Carl D. Reintsema, David A. Rudman, Kazuhiro Sakai, Stephen J. Smith, Robert W. Stevens, Daniel S. Swetz, Paul Szypryt, Joel N. Ullom, Leila R. Vale, N. Wakeham, Joel C. Weber, B. A. Young
Time-division multiplexing (TDM) is the backup readout technology for the X-ray Integral Field Unit (X-IFU), a 3168-pixel X-ray transition-edge sensor (TES)

Patents (2018-Present)

Thermoelectric Devices Based On Nanophononic Metamaterials

NIST Inventors
Kris A. Bertness and Joel Weber
A nanophononic metamaterial-based thermoelectric energy conversion device and processes for fabricating a nanophononic metamaterial-based thermoelectric energy conversion device is provided. In one implementation, for example, a nanophononic metamaterial-based thermoelectric energy conversion device
Created April 9, 2019, Updated January 31, 2023