Dan Schmidt

Dan Schmidt is a research physicist and Group Leader in the Quantum Sensors Division within the Physical Measurement Laboratory. The Device Fabrication Group focuses on the micro-fabrication of sensors and readout that utilize superconducting phenomena. Additionally, the group develops advanced packaging for a broader range of devices. Dan holds multiple patents related to research at NIST and has received several awards including NIST/DOC Bronze and Silver medals.

Publications

Towards Precision Spectroscopy of Antiprotonic Atoms for Probing Strong-field QED

January 15, 2025

Author(s)

Gonçalo Baptista, Shikha Rathi, Michael Roosa, Quentin Senetaire, Jonas Sommerfeldt, Toshiyuki Azuma, Daniel Becker, Francois Butin, Ofir Eizenberg, Joseph Fowler, Hiroyuki Fujioka, Davide Gamba, Nabil Garroum, Mauro Guerra, Tadashi Hashimoto, Takashi Higuchi, Paul Indelicato, Jorge Machado, Kelsey Morgan, Francois Nez, Jason Nobles, Ben Ohayon, Shinji Okada, Daniel Schmidt, Daniel Swetz, Joel Ullom, Pauline Yzombard, Marco Zito, Nancy Paul

PAX (antiProtonic Atom X-ray spectroscopy) is a new experiment with the aim to test strong-field quantum electrodynamics (QED) effects by performing high

Flexible superconducting wiring for integration with low temperature detector and readout fabrication

September 14, 2024

Author(s)

Galen O'Neil, Daniel Swetz, Joel Ullom, Daniel Schmidt, Joel Weber, John Mates, William Doriese, Mark Keller, Michael Vissers, Kelsey Morgan, Robinjeet Singh

We present a method of creating high density superconducting flexible wiring on flexible thin silicon substrates. The flexible wiring, called SOI flex, is

Few-electron highly charged muonic Ar atoms verified by electronic K xrays

July 10, 2024

Author(s)

Takuma Okumura, Toshiyuki Azuma, Douglas Bennett, W. Bertrand (Randy) Doriese, Malcolm Durkin, Joseph Fowler, Johnathon Gard, Tadashi Hashimoto, Ryota Hayakawa, Yuto Ichinohe, Paul Indelicato, Tadaaki Isobe, Sohtaro Kanda, Daiji Kato, Miho Katsuragawa, Naritoshi Kawamura, Yasushi Kino, Nao Kominato, Yasuhiro Miyake, Kelsey Morgan, Hirofumi Noda, Galen O'Neil, Shinji Okada, Kenichi Okutsu, Nancy Paul, Carl D. Reintsema, Toshiki Sato, Dan Schmidt, Kouichiro Shimomura, Patrick Strasser, Daniel Swetz, Tadayuki Takahashi, Shinichiro Takeda, Soshi Takeshita, Motonobu Tampo, Hideyuki Tatsuno, Tong Xiao-Min, Joel Ullom, Shin Watanabe, Shinya Yamada, Takuma Yamashita

Electronic K x rays emitted by muonic Ar atoms in the gas phase were observed using a superconducting transition-edge-sensor microcalorimeter. The high

Effects of Stray Magnetic Field on Transition-edge Sensors in Gamma-ray Microcalorimeters

May 19, 2024

Author(s)

Mark Keller, Abigail Wessels, Dan Becker, Douglas Bennett, Matthew Carpenter, Mark Croce, Jozsef Imrek, Johnathon Gard, John Mates, Kelsey Morgan, Nathan Ortiz, Dan Schmidt, Katherine Schreiber, Daniel Swetz, Joel Ullom

Superconducting transition-edge sensors (TESs) used in x-ray and γ-ray microcalorimeters suffer degraded performance if cooled in a magnetic field B sufficient

Characterization of Transition Edge Sensors for Decay Energy Spectrometry

May 16, 2024

Author(s)

Max Carlson, Ryan P. Fitzgerald, Galen O'Neil, Dan Schmidt

By using a superconducting Transition Edge Sensor (TES) to measure the thermal energy of individual decay events with high energy resolution (goal of 1 keV at 5

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Patents (2018-Present)

Superconducting Multi-layer Transition-edge Sensor And Hybrid Subtractive-additive Production Of A Superconducting Multi-layer Transition-edge Sensor

NIST Inventors

Dan Schmidt and Joel Weber

Hybrid subtractive-additive production of a superconducting multi-layer transition-edge sensor includes: forming a superconductor layer; forming a patterning photoresist on the superconductor layer; forming a sensor pattern in the patterning photoresist; subtractively forming, from the

Hybrid Subtractive-Additive Method Of Producing A Superconducting Multi-Layer Transition-Edge Sensor

NIST Inventors

Dan Schmidt and Joel Weber

The proposed invention is a method of producing a superconducting multi-layer transition-edge sensor in which the first layer of the multi-layer is deposited and patterned completely with a subtractive process before the subsequent layers deposited and patterned using separate additive processes

Recessed Carbon Nanotube Article and Method for Making Same

NIST Inventors

Chris Yung , Nathan A Tomlin and Dan Schmidt

A microbolometer structure including carbon nanotubes, a substrate (silicon, alumina, etc.) with an array of micromachined wells/holes/pockets, a weak thermal link (membrane or legs) at the base of each well/hole/pocket, a protection layer bonded to substrate over the wells for subsequent back side

X-Ray Spectrometer

NIST Inventors

Kevin L. Silverman , Carl D. Reintsema , Galen O'Neil , Luis Miaja Avila , Daniel Swetz , W.Bertrand (Randy) Doriese , Dan Schmidt , Bradley Alpert , Joseph Fowler , Joel Ullom and Ralph Jimenez

This invention includes: an x-ray plasma source that produces primary x-rays; an x-ray optic that transmits and focuses the primary x-ray onto a sample jet from which fluorescence x-ray are emitted; and a microcalorimeter array detector that measures the energy of the incoming fluorescence x-rays

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Dan Schmidt (Fed)

Publications

Patents (2018-Present)