Award Data

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AIRBORNE RADARS FOR THE DETECTION AND TARGETING OF LOW CROSS SECTION GROUND VEHICLES MUST TRANSMIT MORE POWER, USE LARGER ANTENNAS, AND/OR OPERATE AT SHORTER RANGES TO ACHIEVE THE REQUIRED SIGNAL-TO-NOISE RATIOS. IN ADDITION, A MAJOR IMPROVEMENT IN SUBCLUTTER VISIBILITY IS REQUIRED. THIS PROPOSAL DESCRIBES A METHOD OF SIGNIFICANTLY IMPROVING THE SUBCLUTTER VISIBILITY OF SPACE-TIME ADAPTIVE RADARS ...

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THE OBJECTIVE OF THE PROPOSED RESEARCH PROGRAM IS TO INVESTIGATE THE USE OF A NOVEL TRANSITION-RADIATION SOURCE TO PRODUCE A LOW-COST, LABORATORY-SCALE, INTENSE, PULSED X-RAY SOURCE. BY DESIGNING TRANSITION RADIATORS TO EMIT X RAYS AT THE FOIL MATERIAL K-SHELL PHOTOABSORPTION EDGE, THE X-RAY SPECTRUM IS NARROWED. THE SOURCE IS THUS QUASIMONOCHROMATIC (20 TO 50% BANDWIDTH), DIRECTIONAL, INTENSE AND ...

PERFORMANCE OF OPTICAL DEVICES IS GREATLY AFFECTED BY SMALL SURFACE IRREGULARITIES. IN X-RAY OPTICS, FOR INSTANCE, ROUGHNESS CHARACTERIZED BY A ROOT-MEAN-SQUARE HEIGHT OF A FEW ANGSTROMS ON A THIN FILM SURFACE CAN SEVERLY AFFECT DEVICE PERFORMANCE, AND HIGHLY SENSITIVE TOOLS ARE GENERALLYREQUIRED FOR CHARACTERIZATION. SOPHISTICATED METHODS BASED ON X-RAY AND ELECTRON PROBE TECHNIQUES ARE RATHER SE ...

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SOLID-STATE IONIZATION DETECTORS INCREASINGLY FIND USE IN MEDICAL, NUCLEAR, AND HIGH ENERGY PHYSICS AND IN MAGNETIC FUSION RESEARCH. UNFORTUNATELY, SILICON-BASED DETECTORS ARE HIGHLY SUSCEPTIBLE TO RADIATION DAMAGE, CAN OPERATE ONLYIN A NARROW TEMPERATURE REGIME, AND HAVE UNDESIRABLE SIGNAL-TO-NOISE RATIOS EVEN AT ROOM TEMPERATURE. A NEW CLASS OF RADIATION-RESISTANT, HIGH TEMPERATURE DETECTORS BAS ...

SYNCHROTRON RADIATION FACILITIES ARE BEING USED INCREASINGLYFOR ADVANCED MATERIALS RESEARCH. THE EFFECTIVENESS OF THIS RESEARCH IS NOW COMPROMISED BY A SHORTAGE OF SUITABLE CRYSTALS TO MAKE DEVICES FOR LONG WAVELENGTH SPECTROSCOPY INTHE SOFT X-RAY REGION OF 6 TO 30 ANGSTROM. THE CRYSTAL, YTTRIUM BORIDE (YB66), HAS BEEN IDENTIFIED AS A POTENTIAL MONOCHROMATOR FOR DISPERSING SYNCHROTRON RADIATION. K ...

RECENT ADVANCES IN HIGH TEMPERATURE SUPERCONDUCTING (HTSC) THIN FILM TECHNOLOGY ENABLE THE FABRICATION OF LOW-LOSS COMPONENTS THAT WILL IMPROVE THE COST AND PERFORMANCE OF CHANNELIZED RECEIVERS. CHANNELIZED RECEIVERS ARE USED IN SATELLITE TRANSPONDER, ELECTRONIC WARFARE AND ELECTRONICS INTELLIGENCE APPLICATIONS AND ARE COMPRISED OF A GROUP OF NARROW BAND RECEIVERS THAT COVER INDIVIDUAL SLOTS IN A ...

SIGNIFICANT SIMPLIFICATION OF MICROWAVE PHASED ARRAY ANTENNA SYSTEM ARCHITECTURES CAN BE ACHIEVED WITH HTSC DEVICE TECHNOLOGY. ELIMINATION OF THE LOW NOISE AMPLIFIERS (LNAS) CAN BE ACCOMPLISHED THROUGH REPLACEMENT OF THE GAAS PHASE SHIFTERS WITH LOW LOSS HTSC COMPONENTS. A REDUCTION IN COMPLEXITY LOWERS BOTH SYSTEM WEIGHT ANDCOST. KEY TO HTSC TECHNOLOGY INSERTION IN PHASED ARRAY ANTENNAS IS THE DE ...