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Projects/Programs

Topic Area
Displaying 201 - 225 of 470
GH_gascollectionsys

Humidity

Ongoing
Our goals include: Providing SI traceability of humidity standards through use of standardized realization methods, and supporting humidity measurements in the U.S. and abroad through calibrations and proficiency testing Ensuring the equivalence of US humidity standards with those of other countries

Humidity Calibration Services at NIST

Ongoing
Humidity calibration services at NIST are performed with its primary standard humidity generator, the Hybrid Humidity Generator (HHG). The HHG produces humidified air of known moisture content over the dew/frost-point range from -90 °C frost point to +85 °C dew point, which corresponds to a water
decorative image

Hybrid Ferromagnetic-Superconductor Systems

Ongoing
The main goal of the research program is to develop and understand the physics of systems in which a ferromagnet is strongly interacting with (i.e., coupled to) microwave and optical photons. When these measurements are performed using microfabricated resonators, they represent a novel metrology to

Hybrid Ferromagnetic-Superconductor Memory

Ongoing
The core of the research program is to understand how the transit of a supercurrent through a series of ferromagnetic films affects both its amplitude, phase, and spin state, which can result from magnetic fields within the element, interfacial spin-filtering effects, and exchange interactions
Transmission Electron Micrograph

Hybrid Quantum Optomechanical Systems with Solid-State Artificial Atoms

Ongoing
Quantum Dot – Surface Acoustic Wave Microwave-to-Optical Transducers In this project, we focus on coupling nanoscale acoustic resonators with InAs quantum dot (QD) single photon sources (Fig. 1). At ultra-low temperatures, such as those in a dilution refrigerator, the acoustic resonators act as
HIP engines

Hyperspectral Image Projector (HIP)

Ongoing
Remote sensing instruments and medical imagers are designed to take images composed of many spectral bands, not just the minimum three components used by common digital cameras (i.e., red, green, and blue). These images are referred to as hyperspectral because each pixel contains information for
hyperspectral imaging images

Hyperspectral Imaging Standards

Ongoing
There has been a surge in interest in hyperspectral imaging for the use in environmental monitoring, medical imaging, and manufacturing, as several examples. Standards provide common reference points that foster an understanding between different entities. The range of standards encompass all
hyperspectral imager

Hyperspectral Microscopy

Ongoing
NIST has developed a laboratory dedicated to measuring the optical properties of materials through the use of commercial and custom hyperspectral imagers. The custom built hyperspectral imaging microscope covers the 400 nm to 2500 nm spectral range using narrow contiguous spectral bands. This system
NIF

Imaging: Advanced Neutron Imaging Facility

Ongoing
Available as a national user facility since 2006, the NIST Neutron Imaging Facility provides users with a unique “plug and play” approach to imaging operating fuel cells and electrolyzers. In 2016, the NIST-NeXT system was first installed, allowing simultaneous neutron/X-ray tomography of complex
measurement results

Imaging: Characterization of Porous Transport Media for Hydrogen Fuel Cells

Completed
Accurate, in situ characterization of the physical properties of a porous transport layer (PTL) – porosity distribution, liquid saturation as a function of pressure, liquid and gas permeability, thermal conductivity – is critical to improving the understanding, and hence manipulation, of the water
LiNMC battery

Imaging: CREB

Ongoing
The NIST Neutron Imaging Facility (NNIF) has developed an in situ simultaneous Neutron and X-ray Tomography (NeXT) capability that allows for 3D imaging of batteries and other objects [1-3]. Neutrons are complementary to X-rays and when combined allow one to segment and identify features to non
timeline of neutron detector image spatial resolution

Imaging: Evolution of Neutron Image Detector Spatial Resolution

Completed
Neutron imaging has yielded valuable insight into the water content of fuel cells because minimal changes to a test section are needed. A limit of neutron imaging is the achievable spatial resolution, which is primarily dominated by the detector. Figure 1 shows the evolution of the spatial
Bragg-Edge Imaging

Imaging: Improving Lead Battery Efficiency with Neutron Imaging

Completed
Scientists will be joining forces with NIST from INMA (Instituto de Nanociencia y Materiales de Aragón) and Exide Technologies, a global battery company through one of its R&D centers based near Madrid. They will study the fundamental processes that govern recharge efficiency and battery electrode
automotive fuel cell test section

Imaging: M2FCT - The Million-Mile Fuel Cell Truck Consortium

Ongoing
True in operando imaging of PEMFCs to observe and quantify water transport phenomena is only possible with neutrons. NIST, in partnership with General Motors and support of the EERE has developed a world-class facility for in operando neutron imaging of fuel cells for light duty vehicles. Upgrades
Neutron Imaging of Lithium and Alkaline Batteries

Imaging: Neutron Imaging of Lithium and Alkaline Batteries

Completed
This is due to the high sensitivity of neutrons to hydrogen, while having relatively small sensitivity to many common materials of construction such as aluminum and carbon. Neutron imaging can play a similar role in advanced battery development by providing in situ measurements of hydrogen or

Imaging: Neutron Tomography of Hydrogen Storage Bed

Completed
While many techniques exist to measure the volume average of the hydrogen uptake, to date no method exists that can measure the full three-dimensional hydrogen distribution within the storage vessel. In order to address this shortcoming, a prototype hydrogen storage bed has been studied using
die-cast toy

Imaging: The Neutron and X-ray Tomography (NeXT) System

Ongoing
Neutrons and X-rays are complementary, nondestructive, penetrating probes of matter. X-rays interact with the electron cloud of atoms and therefore sees increasing attenuation with atomic number while neutrons interact with the nuclei resulting in a very scattered pattern with atomic number. The
prototype optic

Imaging: Toward a Neutron Microscope

Ongoing
The NIST Neutron Microscope The NIST neutron microscope based Wolter optics represents a complete change in the way neutron imaging will be conducted, as the time and spatial resolution achievable with this instrument will approach that early generation X-ray synchrotron beamlines. A collaboration
Minimum Deviation Refractometer System

Index Properties of Optical Materials (0.12 μm – 15 μm)

Ongoing
The real part of the refractive index, its wavelength dispersion, and its temperature dependence are the key parameters for the design of refractive optical elements for optical systems. The demands for continually improved precision of optical instruments has driven a need for increasingly accurate
X-ray Imaging

Industrial: Enhanced X-Ray Imaging

Ongoing
A variety of in-house x-ray sources and detector technologies invite efforts to optimize traditional image quality metrics and the use of algorithms and methods to extract the maximum amount of information available. These results are used to inform x-ray standards development and will drive the

Infrared cryogenic blackbody broadband calibration

Ongoing
The broadband chamber and the spectral calibration chamber at the LBIR facility are used for calibrating the customer cryogenic blackbodies. These chambers are cooled by closed cycle helium gas at 20 K to provide a background equivalent to space. The absolute cryogenic radiometers (ACRs) in these

Infrared optical properties of materials and components

Ongoing
Our overall program can be summarized by the following 6 key elements: Provide a traceability path to national scales for infrared optical properties to the infrared optical properties community through, NIST Calibration Service 38075S, Standard Reference Materials, cooperative research and
Small array of transistors designed for single device integration.

Integrated CMOS Testbeds for Nanoelectronics and Machine Learning

Ongoing
The increasingly complex device requirements for next-generation computing architectures such as neuromorphic computing or nanoelectronic machine learning accelerators present challenges for researchers across the spectrum of institutions, from small businesses and universities to government