Award Data

CURRENT SYNCHROTRON-BASED MEDICAL IMAGING FACILITIES EMPLOY NARROW (.05 - 1%) BANDWIDTH MONOCHROMATORS TO PRODUCE MONOCHROMATIC SOURCES OF HARD X-RAYS FOR DUAL-ENERGY DIGITALSUBTRACTION ANGIOGRAPHY. WE HAVE BEEN ABLE TO DEMONSTRATE THAT THE BANDWIDTH CAN BE INCREASED TO 5 TO 10% PROVIDED THAT THE TWO QUASIMONOCHROMATIC SOURCES ARE LOCATED AN APPROPRIATE DISTANCE IN ENERGY FROM THE IODINE K-EDGE. M ...

SUPERLATTICE CHANNELING RADIATION IS BEING INVESTIGATED AS AN INTENSE, QUASI-MONOCHROMATIC X-RAY SOURCE. A STRAINED LAYER SUPERLATTICE POSSESSES BENT PLANES WHICH ALTERNATE DIRECTION WITH EACH LAYER OF THE SUPERLATTICE CRYSTAL. A HIGH ENERGY CHARGED PARTICLE WHICH IS CHANNELED ALONG A BENT PLANE WILL FOLLOW THE BENDS IN THE CRYSTAL AND THIS OSCILLATION WILL CAUSE IT TO EMIT RADIATION. HIGH ENERGY ...

THE OBJECTIVE OF THIS RESEARCH IS TO MARKEDLY INCREASE THE EFFICIENCY OF PRODUCTION OF OZONE BY GAS DISCHARGE TYPE OZONE GENERATORS. CURRENTLY, THE LOW EFFICIENCY OF OZONE PRODUCTION, 5 TO 10 PERCENT OF THE THEORETICAL MAXIMUM WITH DRY AIR AND OXYGEN FEED GAS, HAS LIMITED BROADER USE OF THIS POWERFUL OXIDANT AND DISINFECTANT. THERE IS INCREASED INTEREST IN OZONE BECAUSE IT IS ENVIRONMENTALLY COMPA ...

THIS SBIR PROJECT EXAMINES A NEW AND INNOVATIVE METHOD OF IMPLEMENTING A RECEIVER THAT HAS SUPERIOR PERFORMANCE OVER THAT OF CONVENTIONAL RECEIVERS IN REJECTING INTERFERENCE. THE IMPROVED INTERFERENCE REJECTION ALLOWS THE TRANSMITTER TO USE LESS POWER TO ACHIEVE THE REQUIRED BIT-ERROR RATE PERFORMANCE, AND HENCE REDUCES THE PROBABILITY THAT THE TRANSMITTER WILL INTERFERE WITH OTHER USERS OF THE SP ...

THE CONCEPT DESCRIBED HEREIN IS AN ADVANCED HOLOGRAPHIC DIFFRACTIVE STRUCTURE (HDS) FOR THE CONTROL OF LIGHT AT THE WAVELENGTH LEVEL. A STACK OF ELECTRICALLY CONTROLLABLE, LIQUID-CRYSTAL FILLED DIFFRACTION GRATINGS WOULD PRESENT A THIN, LIGHTWEIGHT, CLEAR PANEL, THAT, WHEN PLACED IN CONTACTWITH AN APERTURE SHALL BE ABLE TO CONCENTRATE SUNLIGHT VERY EFFICIENTLY INTO A STABLE AREA IN THE CENTER OF A ...

COMPUTED TOMOGRAPHY (CT), A TECHNIQUE FOR RECONSTRUCTING THEINTERIOR OF AN OBJECT FROM MEASUREMENTS OF ITS LINE INTEGRALS (OR PROJECTIONS), IS INCREASINGLY BEING APPLIED INRESEARCH AND IN NON-DESTRUCTIVE EVALUATION OF INDUSTRIAL OBJECTS. TO HANDLE THE INCREASED SPATIAL RESOLUTION AND THROUGHPUT REQUIREMENTS OF THESE APPLICATIONS, CT SCANNERS MAY BE ABLE TO USE AREA DETECTORS INSTEAD OF THE SINGLE ...

FINE, ULTRAPURE, SPHERICAL PARTICLES ARE DESIRABLE STARTING MATERIALS FOR PRODUCING HIGH PERFORMANCE ADVANCED CERAMIC PRODUCTS. AEROCHEM HAS A UNIQUE FLAME SYNTHESIS PROCESS FORPREPARING SUCH HIGH QUALITY POWDERS, INCLUDING SILICON NITRIDE. THIS PROCESS DIFFERS FROM THE USUAL COMBUSTION SYNTHESIS IN THAT NO OXYGEN IS USED: THE PARTICLE-PRODUCING REACTANTS ALSO SUPPORT THE FLAME. FOR SILICON NITRID ...

PROPOSED HERE IS A DIAGNOSTIC METHOD FOR THE ON-LINE, SEMI-CONTINUOUS DETERMINATION OF THE SIZE AND DENSITY (G/CM(3)) OF INDIVIDUAL PARTICLES IN THE 5 NM TO 100 NM SIZERANGE. THIS IS ACCOMPLISHED THROUGH A DOUBLE SIZE SPECTROMETRY SYSTEM. PARTICLES ARE FIRST SIZED BY THEIR STOKES DIAMETER, AND THEN SIZED BY THEIR AERODYNAMIC DIAMETER. THE FIRST MEASURE, NAMELY THE STOKES DIAMETER SIZING, GIVES THE ...

THE OPPORTUNITY ADDRESSED BY THE PROPOSAL IS TO DEVELOP AN OPTICAL FORCE TRAP MICROMANIPULATOR SUITABLE FOR EVERYDAY USE IN A BIOLOGY LABORATORY. AN OPTICAL FORCE TRAP USES LIGHT FROM A LASER TO EXERT FORCES AND TO MOVE MICROSCOPIC SIZED OBJECTS. BECAUSE THEY USE LIGHT, THEY ARE ABLE TO MANIPULATE LIVING OBJECTS WITHOUT HARMING THEM. THESE CAPABILITIES OPEN UP NEW TYPES OF RESEARCH TECHNIQUES WHER ...

A RESEARCH PROGRAM IS PROPOSED TO DETERMINE THE SCIENTIFIC FEASIBILITY OF A NEW TYPE OF BROAD AREA (>1000 CM(2)), HIGH ENERGY (>400 KEV) ELECTRON GUN CONCEPT. THIS PLASMA ELECTRON (PE) GUN USES A PLASMA, WHICH IS GENERATED AT LOW GAS PRESSURE USING A THIN-WIRE COLD-CATHODE DISCHARGE, AS THE DC SOURCE OF ELECTRONS. THE EXTRACTED ELECTRONS ARE FORMED IN BEAMLETS WHICH PASS THROUGH A THIN METAL FOIL ...