Keyword: Spectroscopy

Briefs: Materials

Superconducting materials are technologically important because electricity flows through them without resistance. Only low-temperature superconductivity seemed possible before 1986,...

Briefs: Imaging

A large-area detector without any dead space capable of handling a large dynamic range does not currently exist. Current large-area detectors have dead zones created by abutting several modules...

Briefs: Sensors/Data Acquisition
Gas Sensing System Employing Raman Scattering

The detection and characterization of molecular gases in a sample is a relatively difficult challenge. Usually, this task is relegated to expensive and time-consuming processes like mass spectrometry and gas chromatography. Furthermore, numerous industrial applications require such gas-phase analysis...

Briefs: Sensors/Data Acquisition

Gas sensors are usually engineered to detect a specific molecule in one of many potential categories: toxic gases, combustible gases, and VOCs. A number of technologies, such as infrared,...

Briefs: Imaging

NASA's Langley Research Center has built a very small spectrometer by integrating a differential linear Fresnel lens onto an imaging chip. NASA is using the lens/chip in a very...

Who's Who: Aerospace

On February 19, The Stratospheric Aerosol and Gas Experiment (SAGE) III instrument launched aboard a cargo capsule to the International Space Station....

Briefs: Sensors/Data Acquisition

This innovation builds off of NASA Langley Research Center’s SansEC sensing system. SansEC is an open-circuit, resonant sensor that needs no electrical connections (thus the name SansEC or...

Briefs: Photonics/Optics
Fourier Transform Spectrometer System

NASA's Langley Research Center and Science Applications International Corporation have developed a method of processing data from Fourier transform spectroscopy (FTS) measurements that improves upon existing methods. This method is simpler, more accurate, faster, and less expensive than previous methods. It...

Briefs: Manufacturing & Prototyping

Quantum cascade (QC) lasers employ intersubband electronic transitions in semiconductor quantum well structures to generate emission at specific...

Briefs: Materials
Measuring Bond Site Concentration on the Intrinsic Aerogel Surface Through Chemisorption of Chlorosilanes

This work involves development of aerogel to be used as a passive absorption media — effectively a concentrator of trace organics — that can be detected by optical techniques. Such a trace organic detection scheme is very different from...

Briefs: Test & Measurement
Technique to Measure Degradation of Submillimeter-Wave Spectrometer Response to Local Oscillator Phase Noise

High-resolution submillimeter-wave spectroscopy is based on the heterodyne principle, where the incident signal is down-converted to a low intermediate frequency (IF) by nonlinear mixing with a local oscillator (LO) signal. The IF...

Briefs: Electronics & Computers

Microwave spectroscopy is an invaluable tool for studying the structure, dynamics, and even the handedness of gas phase species....

Briefs: Photonics/Optics
Downhole Regolith Interrogation with Helium-Assisted Drill and Laser Induced Breakdown Spectroscopy

It is of great interest to the scientific community to have the ability to analyze drilled boreholes in situ on the surfaces of the Moon and Mars. The goal of this work was to design and fabricate a Downhole Regolith Interrogation with...

Application Briefs: Aerospace
Brimrose Corporation of America
Sparks, MD
410-472-7070
www.brimrose.com

Brimrose is developing radiation detectors that can improve NASA’s...

Briefs: Electronics & Computers
Multi-Frequency, THz Quantum Cascade Laser Source

Interest in the use of THz detectors outside the laboratory for space, atmospheric, and terrestrial applications has grown immensely in the past half-century. Of particular interest in recent years is the development of the quantum cascade laser (QCL) as a THz frequency source.

Briefs: Photonics/Optics
MEMS Glow Discharge Plasma Electron and Ion Source

A microelectromechanical system (MEMS) glow discharge plasma electron and ion source (GDEIS) was designed for operation in high-pressure environments such as planetary atmospheres for mass spectroscopy. Glow discharge electron/ ion sources create electrons and ions from gas molecules in an...

Briefs: Sensors/Data Acquisition
Micro-LIDAR for Flow Velocimetry

A miniature light detection and ranging (LIDAR) velocimetry sensor has been developed to analyze high-velocity and boundary layer flows in real-world conditions. Using Rayleigh scattering, as opposed to the more common particle scattering, the patent-pending sensors provide multiple flow parameters without the...

Application Briefs: Sensors/Data Acquisition
Planetary Atmospheres Minor Species Sensor (PAMSS)
University of Central Florida
Orlando, FL
www.ucf.edu

Using a high-altitude balloon, NASA and a team led by University of...

Briefs: Test & Measurement
A Synthetic Quadrature Phase Detector/ Demodulator for Fourier Transform Spectrometers

Fourier transform spectroscopy works by measuring a spectral/light signal through a Michelson interferometer. In order to know the wavelength of the signal, one must use a stable reference, which is typically a metrology laser. In a standard Fourier transform...

Briefs: Materials
Plasma-Assisted Thin Film Coatings to Create Highly Hydrophobic Porous Structures

Gas-distribution layers (GDLs) are water-management structures used in fuel cells and electrolyzers. GDLs are critical components that prevent flooding of the fuel cell electrode by product water, thus preserving open channels for reactant gas to reach the...

Briefs: Information Technology
Fast Classification Method for Multivariate Mixtures of Spectroscopic Responses

In many fields of spectroscopy, classification of the measured multivariate response is not always a straightforward process. Accurate classification is limited by many factors that are highly dependent upon the spectroscopy method being utilized. In all cases,...

Briefs: Manufacturing & Prototyping
Sidewall Passivation of GaN Avalanche Photodiodes via Atomic Layer Deposition

The visible-blind detection of UV light has important applications in planetary imaging and spectroscopy, astronomy, communications, and defense-related imaging. Future instruments for imaging in the ultraviolet will require improvements in detector capabilities. An...

Briefs: Materials
Synthesis of Novel Copoly(alkyl ether imide)s With Unique Surface Properties

Copoly(alkyl ether imide)s were synthesized for the purposes of tailoring surface chemistry. Alkyl ether oligomers with amine end groups were synthesized from the hydroxyl-terminated species, and subsequently reacted with aromatic dianhydrides and diamines to make the...

Briefs: Manufacturing & Prototyping
Highly Aligned Electrospun Fibers and Mats

A modified electrospinning apparatus has been created for spinning highly aligned polymer fibers. Fiber placement, orientation, and porosity are difficult to control using conventional electrospinning apparatus. Conventional electrospinning creates randomly oriented fibers that are well suited to...

Briefs: Physical Sciences

A new technique allows a mercury-cadmium-telluride (MCT) focal plane array (FPA) to operate at room temperature. These results were obtained...

Briefs: Physical Sciences
Deep UV Discharge Lamps in Capillary Quartz Tubes with Light Output Coupled to an Optical Fiber

Researchers at Jet Propulsion Laboratory have come up with a novel approach to the simplification of the 194-nm light source and optical guidance in mercury trapped ion spectroscopy research. Mercury plasma is generated in a capillary tube with a...

Briefs: Physical Sciences
Mass Spectrometry of Spacecraft Contamination Using the Direct Analysis in Real-Time Ion Source

Mass spectrometry is presented as a powerful tool for the analysis of spacecraft contamination when coupled to the Direct Analysis in Real Time (DART) ionization source. DART technology is based on soft ionization and desorption using metastable...

Briefs: Materials
Electride Mediated Surface Enhanced Raman Spectroscopy

A new sensor substrate supports Surface Enhanced Raman Spectroscopy. A ceramic electride is demonstrated to provide surface enhanced Raman scattering. This provides a sensitive method for monitoring the chemistry and electronic environment at the electride surface. The electride, an ionic...

Application Briefs: Photonics/Optics
Volume-phase, holographic-grating Raman
spectrometer
Wasatch Photonics
Logan, UT
435-752-4301
www.wasatchphotonics.com

Raman laser spectroscopy technology from...