Award Data

Certain lanthanide halides have significantly higher light output than NaI:Tl, the comparison standard for scintillators, plus other important properties, including fast decay times and excellent proportionality. Unfortunately, lanthanide halides grown by traditional melt processes have high production costs and limited availability. Crystals are usually limited to about 5 cm x 5 cm, right cylinde ...

It is proposed to develop a novel process for growth of high quality CZT crystals for nuclear detection applications. Currently the THM process is the technology of choice for production of high quality CZT crystals. This process, however, suffers from extremely low growth rates. The development effort proposed here will seek to increase the crystal growth rate by 5-10 times the current levels ...

Three nuclides are especially useful in detecting thermalized neutrons: helium-3, lithium-6 , and boron-10. Since current demand will deplete reserves of helium-3 in roughly two years, there is a large desire to develop detectors that have the capacity to replace helium-3 tubes. In this proposal we spell out our plan to adapt Neotron''s already developed fission neutron detector into a high effic ...

Two approaches are proposed to attack the problems of fixturing process. First, a novel hardware holding system, Dexterous Vise, is proposed. Functionally, a single Dexterous Vise is capable of revealing four faces of the clamped workpiece to the cutting tool without re-fixturing, which actually increases one degree of freedom to the machine tool. A pair of Dexterous Vises, the "Dual-Vise", ena ...

In order to realize the full potential of cryogenic power converters, it is vital to develop the technology for cryogenic capacitors and inductors, in order to be combined with the switching semiconductors. Capacitors with high dielectric constant and high voltage withstand at cryogenic temperatures with low weight and volume lie on the critical path. The proposed work focuses on innovative tech ...

To Operate effectively, PEM small fuel cells stacks need a chemical hydride hydrogen generator. The chemical hydride digital reactor suggested in the proposed program will provide about 2.5 kWH of energy in a5 pound package.--almost three times the energy density of a BA5590 battery. Studies and experiments will be conducted with spe ...

Proposed is the technical development and design of the electronics and cooling systems for a 1 megawatt cryogenically cooled inverter suitable for use in a wide range of applications, including Uninterruptable Power Suplies (UPS) and motors in the +1000 HP range. The proposed work will provide a logical progression to the development that has already been done by American Superconductor Corp. I ...

N/A

SIMOX (Separation by Implanted Oxygen) technology achieves total dielectric isolation of active device regions from the substrate and reduces the collection path for ionized charges via the built-in buried oxide which restricts charge movement. Advances in SIMOX technology include radiation hardened memories and gate arrays for space applications, ULSI DRAMs for low voltage operation, thin film SO ...

An underwater acoustic intensity sensor will be developed and modeled. Acoustic intensity sensors measure the power flow magnitude and direction; and thus, may be used to locate sources of sound. The unit will use a moving coil velocity detector imbedded in syntactic foam for buoyancy. Two omnidirectional hydrophones will be used to detect the pressure. The time averaged product of the p ...