Keyword: Gases

Briefs: Photonics/Optics

The focus of this research program was the investigation of XPAL properties, and new pumping schemes, as well as modeling, and measuring critical photoionization and excited state-excited...

Briefs: Aerospace

An effort has been made within the US Army Research Laboratory (ARL) to extract quantitative information on explosive performance from high-speed imaging of explosions. Explosive fireball surface...

Briefs: Aerospace

In recent years, photoacoustic spectroscopy (PAS) has emerged as an attractive and powerful technique well suited for sensing applications. The development of high-power radiation sources and...

Briefs: Defense

Development of robust semiconductor devices with high energy efficiency and reliability is a key objective towards 'Energy...

Articles: Defense

Lightweighting continues to be a key topic for the aerospace, avionics and defense industries as new metals and composites are being integrated into end products and assemblies with the goal of...

Briefs: Sensors/Data Acquisition

Monitoring trace gases is of great importance in a wide range of applications. Detecting a diverse range of chemical agents requires an adaptable sensor...

Briefs: Manufacturing & Prototyping

The efficiency and methodology of coupling light into microcavities has improved exponentially in the last decade. One such advancement is coupling light onto silicon microspheres. The material, size, and...

Briefs: Aerospace

The threat of improvised explosive devices (IEDs) to human life is grave, and countering this threat is a high priority for force protection during military...

Technology Update: Defense

Boeing is “running on schedule” as it continues to achieve production milestones for the first of its all-electric-propulsion 702SP (small platform)...

Briefs: Materials

One of the most important requirements in next-generation batteries is to concurrently deliver high energy density and high power density (fast charge-discharge rates). The high power density...

Briefs: Test & Measurement

Turbines in aircraft turbojet engines are being subject to increasingly higher temperatures to improve fuel efficiency. High turbine efficiency requires the ability of turbine blades to...

Briefs: Manufacturing & Prototyping
Operation and On-Chip Integration of Cavity-QED-Based Detectors for Single Atoms and Molecules

A new experimental platform for studies of transport and quantumlimited measurements of cold, trapped atomic gases was constructed. Using microfabrication processes, a silicon wafer was micromachined to allow for deposition of micrometer-scale...

Articles: Electronics & Computers

Anovel tested technology for cooling electronic circuitry is also useful in many other industries. The method is called “Thin Cavity Fluidic Heat Exchanger”(TCFHE). Technology details can be...

Briefs: Manufacturing & Prototyping

Single-wall carbon nanotubes (SWNTs) are the most attractive material in the fields of nanoscience and nanotechnology due to their chemical, physical, and...

Briefs: Materials

When a high-energy laser (HEL) beam transmits through a window material, a part of the laser energy is absorbed by the material and causes optical aberrations. This absorbed energy results...

Application Briefs: Defense

Until recently, single-use high energy devices were typically powered by reserve/thermal batteries using decades-old technology. Recognizing that battery performance limitations could...

Articles: Aerospace

Limiting leakage in aerospace turbo-machinery has been a focus of engineers ever since the advent of the turbine. An increasing number of companies are finding that fiber...

Briefs: Electronics & Computers

Gallium nitride (GaN) high-power electronic (HPE) devices have the potential to outperform those made from 4H-silicon carbide (SiC), the polytype used for HPE devices, because it has a larger critical...

Briefs: Photonics/Optics
Surface Plasmon-Enhanced Si:Er Infrared Light-Emitting Diodes

Plasmons are collective oscillations of the free electrons in a metal or an ionized gas. Plasmons dominate the optical properties of noble-metal nanoparticles, which enables a variety of applications including electromagnetic energy transport at nanoscale dimensions, single-molecule...

Briefs: Materials
Dynamic Response and Failure Mechanisms of Layered Ceramic-Elastomer-Polymer/Metal Composites

A thorough study through a combination of ballistic and impact experiments, microscopic failure characterization, and numerical simulations has been carried out in order to decipher the underlying mechanisms involved in the interaction between a blast...

Briefs: Materials

The objectives of this research are to examine the feasibility of real-time sensing of chemical and biological species by using the unique materials and...

Briefs: Physical Sciences
Imaging and Spectral Measurements of Explosions

A document describes experiments performed to investigate rates of delivery of energy onto targets from different explosive formulations. The experiments were designed to measure relative positions of blast fireballs and leading shock fronts; determine whether different explosive formulations...

Briefs: Materials

A structural multifunctional fuel cell design enables material elements participating in power or energy processes to also carry significant structural loads....

Briefs: Electronics & Computers

A novel high-temperature, high-voltage power electronics capacitor incorporates materials of construction and electrical components that have been initially designed as a segment of...

Briefs: Materials
Barium Ferrite Materials for Microwave Circulators

Barium ferrite thick disks have been fabricated for incorporation in self-biased microwave devices. The process uses barium ferrite nanopowder mixed with epoxy. The mix is placed on alumina substrates to fabricate 500 μm thick disks of BaM to achieve good magnetic properties such as magnetic...

Briefs: Materials

Several advances have been made in research in the art of tailoring polymeric films to be, variously, (1) much more effective as barriers to diffusion of liquids and gases than they...

Briefs: Information Technology
Magneto-Fluid Dynamics Calculations for Aerodynamics

Governing differential equations, and algorithms to solve the equations numerically, have been developed to enable computational simulation of weakly ionized aerodynamic flows in the presence of electromagnetic fields. The equations and algorithms are intended mainly for application to...

Briefs: Sensors/Data Acquisition

Laser-induced breakdown spectros - copy (LIBS) has been investigated for potential utility as a means of detecting trace amounts of chemical explosives and residues thereof in lawenforcement, forensic...

Briefs: Electronics & Computers

A DC-to-DC power converter, nominally rated for a power of 180 W, an input potential of 28 V, an output potential of 270 V, and a maximum operating temperature of 200°C has been...