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Projects/Programs

Displaying 151 - 172 of 172

SDO/EVE/ESP Calibration

Ongoing
The SDO satellite is the first mission in NASA's Living With a Star program, which aims to understand the connections between the Sun and Earth. In addition to the light and heat with which we are familiar, the Sun produces x-ray radiation, extreme ultraviolet light, and the solar wind which

Security (Archive): Neutron Detector Replacement Program

Completed
This course of action has included an intense sequence of tests of alternative technologies performed at the Los Alamos National Laboratory and the Nevada National Security Site. NIST has been integral to all phases of these testing programs, including evaluation of submitted detectors, design and

Sensing and Imaging of concealed objects

Ongoing
Threats to personal and collective safety abound in our society. The Security Technologies Group (STG) performs research to advance the technology and measurement science of security imaging and sensing. This work includes the establishment of test and evaluation tools, reference test beds, test

Sensing, Transport, and Simulation

Ongoing
We have recently developed a finite-size scaling approach and special simulation cell aspect ratio—the golden aspect ratio—to enable accurate incorporation of access resistant and bulk diffusion in ionic transport, see the figure. This enables quantitative, and efficient, prediction of ion transport

Single-molecule biosensors

Ongoing
We are developing new tools to investigate the energy landscape of single-molecule sensors. Our goal is to apply a wide-ranging array of technologies to probe the critical physicochemical properties of nanopore biosensors. These properties include the free energy of confinement for polymers as they

Spectroscopy and Application of Solid-State Quantum Centers

Ongoing
Quantum color centers in wide-bandgap semiconductors have spin and optical degrees of freedom, which can be leveraged for applications such as sensing and single-photon generation. In materials like diamond and silicon carbide, long spin lifetimes and quantum coherence times enable sensitive

Standard Reference Materials: Standardization of 232U (SRM 4324c)

Ongoing
The certified massic activity for 232U was obtained by 4παβ LS spectrometry with two commercial LS counters. The beta detection efficiencies for the 232U daughters were calculated using the MICELLE2 code for the CIEMAT/NIST efficiency tracing (CNET) method with composition-matched LS cocktails of a

Standard Reference Materials: Standardization of 243Am (SRM 4332f)

Ongoing
The certified massic activity for 243Am was obtained by 4παβ LS spectrometry with two commercial LS counters. The beta detection efficiencies for the 243Am daughter ( 239Np) were calculated using the CN2003 code for the CIEMAT/NIST efficiency tracing (CNET) method with composition-matched LS

Standards Development to Ensure Reliable Breath Analysis in the Field

Ongoing
Numerous volatile organic compounds (VOCs) have been identified in human breath. These compounds can be produced by the body or by organisms in the body (e.g., bacteria or viruses) and provide a non-invasive window into human health. Inexpensive point-of-care devices are being developed to diagnose

Structural Metrology of Advanced Manufacturing Processes

Ongoing
Understanding material structures in advanced manufacturing is crucial because it enables precise control over material properties, leading to improved performance, efficiency, and cost-effectiveness in production processes. However, this understanding poses many challenges, such as the

Terahertz Imaging and Sources

Ongoing
Over the past several years, we have focused on bolometric detection of THz radiation. Our initial work on cryogenic detectors has been extended to antenna-coupled bolometers operating at room temperature. These detectors provide a rugged, low-cost alternative for homeland security applications; e.g

Theoretical Mass Spectrometry

Ongoing
No Description Intended Impact Unknown compounds will be identified more reliably. Quality control for the NIST Mass Spectrometry Database will be enhanced. Goals Develop software tools for predicting microcanonical branching fractions automatically. This is currently too laborious and too technical

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

Transport Property Measurements for Semiconductors and Energy Materials

Ongoing
The properties of materials and interfaces that govern reliability, performance, and thermal transport in advanced microelectronic packages are not fully characterized or understood, especially at device length scales wherein properties may differ significantly from bulk or literature values

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

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

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

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

X-ray Testbed for Breakthrough Catalyst Measurements

Ongoing
Interested in collaborating? See below What does this project do for industry? Current measurement techniques are unable to follow the reaction pathways during catalysis and are limited to observing only the end products or looking at catalysts outside of realistic reaction conditions. Our new