Award Data

ABSTRACT: Study of non-stationary phenomena in turbulent combusting flows requires spatial measurements of a set of parameters at kHz rates. Ideally these parameters would include the velocity , temperature, and a relevant species concentration. In response to this need, ORBITEC and the University of Wisconsin-Madison propose to develop a technique to measure velocity, temperature, and OH conce ...

ABSTRACT: An instrument measuring volume charges in thin dielectric films is proposed. The instrument utilizes an enhanced Pulsed Electro-Acoustic (PEA) technique and delivers submicron spatial and at least 0.1 micro-Coulombs per cubic centimeter resolutions of the charge density. Traditional PEA instruments suffer from significant signal loss due to acoustic mismatches between the testing materi ...

The technical objectives of this proposal are: 1) the design of 3.0-3.5 micron-emitting quantum cascade laser (QCL) structures grown on metamorphic-buffer-layer (MBL) substrates; 2) the realization of electroluminescent QCL structures on MBLs with emission in the 3.0-3.5-micron wavelength range. Novel tapered active-region (TA) QCLs will be designed to substantially suppress carrier leakage out of ...

The technical objectives of this proposal are: 1) Implement the design developed in Phase I for the realization of 8 micron-emitting active-photonic-crystal (APC) quantum-cascade (QC) lasers of 3 W average, diffraction-limited power and 15 % wallplug efficiency in quasi-CW operation; 2) Design and realize 4.6 micron-emitting APC QC lasers of 3 W CW diffraction-limited power and 15 % wallplug effic ...

Accelerators used for nuclear-physics research require megawatts of radio-frequency energy. They currently employ vacuum-tube power amplifiers or conventional solid-state amplifiers that are inefficient and therefore consume a great deal of prime power. Many other applications including semiconductor processing, cellular-telephone base station transmitters and military communication systems simila ...

Accelerators used for nuclear-physics research require megawatts of radio-frequency energy. They currently employ vacuum-tube power amplifiers or conventional solid-state amplifiers that areinefficient and therefore consume a great deal of prime power. Many other applications including semiconductor processing, cellular-telephone base station transmitters and military communication systems similar ...

Conventional indoor environmental monitoring technologies are expensive, cumbersome to install and maintain, and do not provide the distributed granularity required to capture the necessary details for efficient energy management of commercial buildings. Developments in wireless sensor networks (WSN) provide substantial framework for monitoring and addressing indoor environments at scale. However ...

Complex skin defects, including burns and trauma, represent a major medical problem affecting both military and civilian populations. In recent military engagements, burns account for approximately 5% of combat casualties. Furthermore, approximately 1.25 million Americans each year require medical attention for complex skin defects, with 50,000 people hospitalized for burns and 13,000 requiring sk ...

ORBITEC proposes to develop non-toxic propulsion systems to replace hyradzine-derivative systems in interceptor applications. In ongoing work, ORBITEC has been developing high-performance ionic liquid fuels. These inherently non-volatile fuels promise safer, less sensitive systems while providing specific impulse comparable to MMH and density specific impulse 10-15% higher. Because the ionic li ...

ABSTRACT: Quantum-dot gain medium in semiconductor lasers exhibit higher resistance to radiation induced damage. Irradiated diode lasers comprising quantum-dot gain medium demonstrated lasing two orders of magnitude beyond the maximum dose sustainable by quantum-well semiconductor lasers. These studies point to the strong potential for achieving a radiation resistant diode laser. Additionally, ...