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Metrology

Thermometry metrology

News and Updates

Projects and Programs

Platform for Realizing Integrated Molecule Experiments

Platform for Realizing Integrated Molecule Experiments (PRIME)

Ongoing
Blackbodies realize a clear relationship between radiated power and temperature through Planck’s law. While a reliable instrument for temperature and power calibrations, blackbodies are afflicted with a plethora of systematics (e.g., non-ideal emissivity, propagation loss, temperature gradients
NIST Shielded Room

Johnson Noise Thermometry

Completed
The NIST Gaithersburg JNT project produces data useful for verification of the International Temperature Scale of 1990 (ITS-90) over a temperature range from 500 K to 930 K. This range overlaps those covered by other thermodynamic methods, most notably the upper-most range of Acoustic Thermometry
shaded quasi sphere

Atomic Standard for Pressure

Ongoing
Atomic physicists have calculated the pressure p( n, T) of helium gas as a function of the gas's temperature T and its refractive index at microwave frequencies, n. Near room temperature and 4 MPa, the fractional uncertainties from the calculations, the impurities in helium, state-of-art
thin-film payload

Cryogenics

Ongoing
Almost all the devices developed by the Quantum Sensors Group work at temperatures below liquid helium. Sometimes, it is necessary to develop specialized cryogenics to test the devices, or to facilitate their dissemination to outside users. The cryogenics team also aims to make refrigerators more

Publications

Tools and Instruments

Awards