It is proposed to develop a directional solidification system equipped with a novel sensor to maintain a separation gap between the crucible containing the charge and the solidifying charge. The interaction of crucible wall and the solidifying charge during growth of single crystals of electronics… More

It is proposed to develop a directional solidification system equipped with a novel sensor to maintain a separation gap between the crucible containing the charge and the solidifying charge. The interaction of crucible wall and the solidifying charge during growth of single crystals of electronics… More

It is proposed to develop a directional solidification system equipped with a novel sensor to maintain a separation gap between the crucible containing the charge and the solidifying charge. The interaction of crucible wall and the solidifying charge during growth of single crystals of electronics… More

"It is proposed to develop a novel growth system capable of producing large diameter and long Semi-Insulating SiC crystals. The proposed system aims to achieve semi-insulating properties in the crystal by reducing the impurity levels in the reactorassociated with the graphite containment elements. … More

A novel system for growth of bulk semi-insulating silicon carbide (SI-SiC) is proposed. In this growth system a novel technique is used to reduce the impurity levels in the grown crystal to levels much lower than what is currently available commerciallyor in the laboratories.. The growth system… More

The goal of this program is to improve the thermal performance of RF power devices, by reducing their internal thermal resistance. This work will benefit both High Voltage GaAs (HV-GaAs) as well as GaN and SiC RF devices.

This program focuses on growth of uncompensated semi-insulating SiC crystals by using high purity precursor gases in a novel High Temperature CVD reactor. The crystal growth process is tailored to minimize release of impurities into the growth chamber and incorporation of these impurities into the… More

This proposal is focused on the development of a novel method for the growth of low-dislocation-density, high-purity, and low-precipitate-concentration CdZnTe and CdSeTe crystals for use as substrates for MCT detectors. This work is motivated by the observation that II-VI compound semiconductors… More

The aim of this program is to produce a commercial suite of simulators for design-stage thermal analysis of high power RF devices. The simulators will be easy-to use thermal analysis tools for exploratory as well as detailed analysis of FETs and MMICs. Two complementary FET simulators and one… More

The goal of this program is to extend our Phase I success in growing detached CdZnTe crystals to growth of high quality 51-mm (2-in) diameter crystals as substrates for LWIR sensors. This goal is to be pursued through a strong emphasis on purification of starting materials, experimental… More

A high-fidelity simulator for the growth of alloy compound semiconductors by the Bridgman technique in presence of travelling mangetic fields in proposed. The simulator will capture the physics of solidification of alloy compound semiconductors including thermo-solutal convection, and will fully… More

LaBr3 detectors show exceptional properties in terms of scintillation light yield, energy resolution, and fast emission. To date, this material is not available in the large sizes needed for a number of detector applications in high energy physics. This project will develop a growth process for this… More

The goal of this program is to build a system for growth of alloy semiconductors with electro-magnetic stirring, and to use this system to grow AlGASb crystals. The growth system will be built to be easily configurable for crystal growth by the Vertical Bridgman,and Traveling Heater methods. It will… More

This proposal seeks to develop a new process for production of large area CdZnTe substrates for large area focal plane arrays. The proposed system promises to overcome innate scale-up obstacles in the current method for production of CdZnTe crystals.

Significant improvements in cost and performance of X-ray and ¿ -ray detectors, needed to fulfill DOE responsibilities with respect to nuclear nonproliferation, can be achieved through the availability of high-quality radiation detector materials. This project will develop a novel method for the… More

The work proposed here seeks to produce CZT substrates with superior qualities aimed at improving the performance of MCT detectors used in infrared detectors. The proposed work promises to overcome one of the major causes of dislocation formation in MCT structures.

The goal of this program is to produce large area Cadmium Zinc Telluride (CZT) substrates for growth of Mercury Cadmium Telluride (MCT) films for application in IR Focal Plane Arrays. Two growth processes will be pursued in this program. The grown CZT crystals will be processed into substrates. … More

OBJECTIVE: Improve radiation detection material processing for consistently more efficient larger detection materials with shorter overall preparation times. DESCRIPTION: The quality, quantity, size, and cost of radiation detection materials and system are limited by current manufacturing… More

The recent discovery of Eu activated alkali-earth halide scintillators promises to revolutionize remote detection and identification of radioisotopes. This proposal addresses the development of methods for production of large-volume, high-quality CsBa2I5scintillators. High-quality, low-cost… More

The recent discovery of Eu activated alkali-earth halide scintillators promises to revolutionize remote detection and identification of radioisotopes. This proposal addresses the development of methods for production of large-volume, high-quality Barium Bromine Iodide scintillators. High-quality,… More

CdZnTe remains the material of choice for room temperature semiconductor detection of X- and -ray radiation. The proposed program seeks to develop an alternate method for growth of this material which would achieve superior material properties similar to those obtained by the slower growth method of… More

The goal of this proposal is to develop fast wafer-scale techniques for characterization of Zn-concentration and precipitates and inclusions of Cd and Te. A novel approach to spectrometry will be used to develop a fully automated system for generation of high resolution 2D map of Zn-concentration… More

The work proposed here seeks to produce CZT substrates with superior qualities aimed at improving the performance of MCT detectors used in infrared detectors. The proposed work promises to overcome one of the major causes of dislocation formation in MCT structures.

Successful growth of novel halide scintillators SrI2:Eu and CLYC depends on a supply of highly pure precursor materials. CapeSym and SAFC will partner to provide holistic analysis of the nature of precursor impurities and their impact on scintillator performance. We will characterize light and heavy… More

TlBr is a promising gamma radiation semiconductor detector material primarily due to its high Z component and high density. TlBr detectors, however, suffer from polarization at room temperature and degrade rapidly under applied bias. Polarization is associated with ionic conductivity in this… More

The recent discovery of Eu activated alkali-earth halide scintillators promises to revolutionize remote detection and identification of radioisotopes. This proposal addresses the development of methods for production of large-volume, high-quality CsBa2I5scintillators. High-quality, low-cost… More

CdZnTe remains the material of choice for room temperature semiconductor detection of X- and -ray radiation, but the availability of high performance material is limited and the cost is very high. The goal of this project is to develop a new technology for production of large volumes of CZT single… More

This program will develop a turnkey system capable of rapidly producing high-resolution maps of transmittance, energy gap, composition, lattice constant, second-phases and residual strain fields in a variety of substrates critical to Ballistic Missile Defense. The characterization tool developed… More