Keyword: Radiation

Briefs: Materials
Strong and Flexible Carbon Fiber Reinforced Phenolic Composites

A new class of phenolic and carbon-fiber-reinforced phenolic composites has been developed for thermal protection systems. The new materials have the advantage of being lightweight, strong, and tough, yet heat resistant and flexible. They retain excellent mechanical strength at high...

INSIDER: Electronics & Computers

The heat that builds up in the shuttling of current in electronics is an important obstacle to packing more computing power into ever-smaller devices; excess heat can cause them...

Briefs: Sensors/Data Acquisition

Future cryogenic far-infrared (IR) missions will require moderate-resolution far-IR spectrometers operating at the photon background limit. Full utilization of these facilities requires...

Briefs: Materials
Nanocomposites for Radiation Shielding

Currently, lead and lead-based materials are used to fabricate shields not only for X-rays, but also for other types of radiation. With the growing environmental concern about the toxicity of lead, and the high costs associated with transporting heavy lead-based shields in spacecraft, alternatives are...

Briefs: Test & Measurement
Improved Detection of Kidney Stones Using S-mode Ultrasound

Ultrasound has been a useful tool in the detection of kidney stones. It is a low-cost solution that does not require ionizing radiation that would be harmful to vulnerable populations such as children and recurrent stone formers. However, it suffers from a broad range of sensitivity (78...

Briefs: Medical

Chromosomal inversions, such as those occurring following exposure to ionizing radiation, are especially difficult to detect by current techniques. Therefore, their true frequency and...

Briefs: Photonics/Optics
Enhancing Neutron Imaging with Grazing Incidence Optics

A low-cost optical element was developed specifically for neutron optics applications. The technology operates as a reflective lens — similar to proven grazing incidence optics used for x-ray imaging — and improves neutron imaging resolution for applications using low-energy (<1...

Briefs: Electronics & Computers
Nanoscale Vacuum Channel Transistor

This invention presents a nanoscale vacuum tube or vacuum transistor fabricated entirely using current silicon integrated circuit manufacturing techniques. Vacuum is better for electron transport than any semiconductor since there is no electron scattering. In addition, vacuum devices are immune to radiation....

Briefs: Electronics & Computers

A standard solar array is a flat panel configured of many individual solar cells, wired in series or parallel, depending on their junction configuration and material. Since...

Briefs: Test & Measurement
Neutron Spectrometer for Inner Radiation Belt Studies

The Earth’s magnetosphere offers a wealth of information on particle dynamics, acceleration, and trapping. Fast neutrons, produced in the Earth’s atmosphere by the impact of galactic cosmic rays (GCRs) and solar energetic particles (SEPs), are an important but poorly measured component of...

Briefs: Test & Measurement
High-Energy Instrumentation for Small Satellite Platforms

Given the increased availability of small satellite opportunities either through CubeSats or the Air Force’s University Nanosat program, and the limited availability of larger platforms, it is challenging to develop new instrumentation that not only fits within the envelope of small...

NASA Spinoff: Manufacturing & Prototyping

To understand the Sun’s impacts on Earth, NASA initiated the Living with a Star program in 2001, and began developing a key research satellite: the Solar Dynamics...

Briefs: Energy
White, Electrically Conductive, Radiation-Stable, Thermal Control Coating

A highly reflective, white conductive coating system was developed using a layered approach with a combination of commercially available white conductive pigments within a conductive binder system. The top coating is a space-stable, radiation-resistant, highly reflective...

Briefs: Test & Measurement
Dual-Cavity Rayleigh Scattering Measurement System

Molecular-based optical diagnostics techniques capable of obtaining simultaneous measurements of multiple fluid properties are critically important for characterizing hypersonic air-breathing engines, such as scramjet engines and scramjet-rocket combined cycle engines. Correlations between those...

Briefs: Software
A Large-Eddy Simulation Model of the Atmospheric Boundary Layer

The atmospheric boundary layer is the lowermost layer of the atmosphere and is host to a plethora of physical processes that significantly affect weather, climate, and air quality. In many applications, detailed information about the boundary layer is required at high temporal and...

Application Briefs: Aerospace
Data recorders and software
Diversified Technical Systems (DTS)
Seal Beach, CA
562-493-0158
www.dtsweb.com

It’s no simple task to travel 3,600 miles into space,...

Briefs: Manufacturing & Prototyping
Mechanically Induced Nucleation Improves Crystalline Quality During Melt Growth of Semiconductors

For certain semiconductors with important applications, the existing bulk crystal growth technique from the melt usually results in poor-quality multi-crystalline ingots that cause the typically low yield of the commercial growth process. The...

Briefs: Medical
Gene Expression Signatures for Colon Carcinogenesis and Radiation-Induced Cellular Transformation

Monitoring colon health and transformation into a diseased tissue, including inflammation and cancer, is difficult using conventional techniques, as individuals are required to undergo invasive procedures. However, by using exfoliated cells, it is...

Articles: Aerospace

At the annual meeting of the Society of Automotive Engineers (SAE) in Detroit on January 14, 1959, NASA’s first Administrator, Dr. T. Keith Glennan, said: “I can imagine a remote future when...

Briefs: Sensors/Data Acquisition
Low-Power Charged Particle Counter for Space Radiation Monitoring

A miniature, low-power, solid-state detector for ionizing radiation was developed for use in more locations, and requiring less space and lower power than current technology. An accepted way of counting high-energy charged particles common in space radiation is to detect the light...

Briefs: Test & Measurement
A Continuous-Flow, Microfluidic, Microwave-Assisted Chemical Reactor

In industrial synthetic chemistry laboratories, reactions are generally carried out using batch-mode methodologies, stepwise reactions, and purifications to generate a final product. Each step has an associated yield of both the reaction itself and of the final purification...

Briefs: Semiconductors & ICs
Detecting Loss of Configuration Access of Reprogrammable FPGA Without External Circuitry

The configuration of the reprogrammable field-programmable gate array (FPGA) currently on the market is very susceptible to single event upset when it operates in radiation environments. The current state-of-the-art approach is to refresh the configuration...

Briefs: Semiconductors & ICs
SEE Mitigation Technique for Self-Timed Circuits and Rad-Hard, Self-Timed Configurable Memory

To enable NASA’s next-generation missions, there is a critical need for a reconfigurable field programmable gate array (FPGA) that can withstand the wide temperature ranges and radiation of the space environment while consuming minimal power without...

Briefs: Manufacturing & Prototyping
Modeling Laser Ablation and Plume Chemistry in a Boron Nitride Nanotube Production Rig

The future of manned and unmanned spaceflight and exploration depends on economical access to space through multifunctional, lightweight materials. Boron nitride nanotube (BNNT) composites offer distinct advantages for enhanced survivability during long-term...

Briefs: Electronics & Computers
Technology-Independent RHBD Library Through Gate Array Approach

As semiconductor technology nodes scale down, the limitation on polysilicon pitch makes it almost impossible to shrink libraries built for previous technologies. To design a library for a new technology, all of the cells have to basically start from scratch. Starting over for each...

Briefs: Aerospace
GEO-CAPE Airborne Simulator (GCAS)

This IRAD (Internal Research and Development) project was conceived as an aircraft instrument and designed with specifications that are closely aligned with the science requirements of the Geostationary Coastal and Air Pollution Events (GEO-CAPE) mission. The work has been used to both advance the technology...

Briefs: Sensors/Data Acquisition
Nanosensor/Cellphone Hybrid for Detecting Chemicals and Concentrations

Nanosensors have been developed for chemical detection using carbon nanotubes (CNTs). Unlike other chemical sensors, this solid-state approach requires no reagents and can be refreshed with a solid-state ultraviolet (UV) diode. The sensors possess high sensitivity (ppbv),...

Briefs: Physical Sciences
Analog Ceramic Isolated Voltage Sensor

Galvanic isolated monitoring of voltages for launch vehicle, missiles, and space-deployed systems can be very challenging. Radiation exposure makes use of optics-based sensors difficult, as they can latch-up and become corrupted by the radiation environment; such devices can moreover be thermally...

Briefs: Materials
Layered Composite Thermal Insulation System for Non-Vacuum Applications

Ambient air insulation systems for low-temperature (sub-ambient) applications are difficult to achieve because of moisture ingress and environmental degradation, as well as thermal stress-cracking. Most currently accepted methods for externally applied outdoor environments...