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Projects/Programs

Topic Area
Displaying 451 - 469 of 469
NIST disciplined clock chassis

Time Measurement and Analysis Service (TMAS)

Ongoing
The TMAS meets the requirements of any facility or organization that needs to maintain a high accuracy time standard. TMAS customers include calibration and metrology laboratories, telecommunication providers, instrumentation manufacturers, military installations, defense contractors, government

Training and optimization of hardware neural networks

Ongoing
The goal of this project is to develop a general method that can train many different types of neural networks, and to demonstrate and evaluate their performance on new emerging hardware. We aim to develop and demonstrate training on diverse hardware platforms, and in the presence of realistic noise
MDXR

Transfer radiometers and reference detectors

Ongoing
Use of these radiometers depends on a primary standard detector and a secondary transfer detector. We generally employ an absolute cryogenic radiometer (ACR) as the primary standard detector to calibrate the transfer detector, a Si:As blocked-impurity-band (BIB) detector. The transfer detector is
Reflectance-type silicon trap-detectors

Transfer and working standard radiometers and photometers

Ongoing
Reflectance-type silicon trap-detectors – Silicon trap-detectors have been developed for use as transfer standards for the IR-SIRCUS and IR-Laser Scatter and Detector Characterization facilities. They are built using either Hamamatsu S6337 or S1337 photodiodes. UV silicon trap-detectors have also
Transient flow facility for vehicle refueling

Transient Flow Facility

Completed
Impact Provide metrological tools and standards supporting the fair trade of hydrogen gas as a vehicle fuel of the future. Objectives Design, construct, and utilize a facility that mimics retail hydrogen fueling station conditions to quantify uncertainties of flow measurement standards and
trap assembly

Trapped Sr+ ion clock; a secondary realization of the SI second

Ongoing
The single 88Sr + clock is attractive for both its frequency accuracy and for its relative simplicity. The 674 nm clock transition has been independently studied at several NMI’s at the 10 -17 level [1-4]. Advances in light source technology [5,6] may allow operation with just two lasers: one for
Computer-generated image showing a cross-shaped gold metal cutout on a red mount in between two metal posts, with an inset magnifying the cutout to show blue and yellow balls at the center.

Trapped Ion Optical Clocks

Ongoing
This project uses techniques from quantum information science to enable precision metrology. We use the dipole-forbidden 1S 0 - 3P 0 transition in singly-ionized aluminum as an stable frequency reference (natural linewidth ~8 mHz), which we detect using quantum logic spectroscopy with a second ion
Sample in cryostat.

Ultrafast Spectroscopy to Advance Microelectronics

Ongoing
Continued advancement in microelectronics, including analog and digital electronics, power electronics, optics and photonics, and micromechanics for memory, processing, sensing, and communications as defined by the OSTP “National Strategy on Microelectronics Research,” requires knowledge of material
temperature distribution graphs

Understanding Flow Meters

Ongoing
Critical flow venturis (CFVs) are widely used for gas flows of 1 L/min or more, if a significant pressure drop is acceptable. Theoretical discharge coefficient ( Cd): A calculated value of the discharge coefficient allows 0.3% uncertainty from a CFV from a low uncertainty throat diameter measurement
Shrinkflation-new package fewer tea bags

Uniform Unit Pricing: Tools for Consumers to Fight Shrinkflation

Ongoing
What is Unit Pricing? The pricing of goods based on the cost per unit of measure is commonly known as unit pricing. A unit price label often displays the product name and size, the price, the price per unit (e.g., how much you pay per gram, liter, or ounce), and other information. Unit pricing is
Hybrid quantum information processing

Universal Quantum Bus

Ongoing
The goal to develop quantum computers—a long-awaited type of computer that could solve otherwise intractable problems, such as breaking complex encryption codes—has inspired scientists the world over to invent new devices that could become the brain and memory of these machines. Many of these tiny

Using Quantum Information for Thermodynamics

Ongoing
We re-envision thermodynamics using the mathematical and conceptual toolkit of quantum information theory. We call this research “quantum steampunk,” after the steampunk genre of art, literature, and film that juxtaposes Victorian settings with futuristic technologies. Leveraging quantum
Jan Konijnenburg Testing Device Thumbnail

USNWG Field Reference Meters: Coriolis Mass Flow Meters

Ongoing
Customers and businesses alike rely on metering systems to monitor and deliver their liquid-based commercial products (including a range of gas and fuels) consistently over time and across a range of locations. Weights and measures officials use several well-acknowledged field test standards to

Vision science

Ongoing
NIST has been providing physical measurement standards in photometry and colorimetry for many years. However, the definitions of photometric and colorimetric units and standards are often questioned or found to be insufficient for modern lighting technologies. Large discrepancies between

X-ray computed tomography (CT) for medical applications

Completed
As scale lengths get smaller, diffraction becomes increasingly prominent in tomography. The work here develops diffraction tomography for laboratory sources. A new laboratory scale instrument at NIST/Boulder is dedicated to tomography of integrated circuit interconnects. Tomography software written
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