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HIGH POWER TRANSIT-TIME AMPLIFIERS ARE A NEW CLASS OF RF SOURCE THAT CONVERTS THE KINETIC ENERGY OF AN ELECTRON BEAM INTO RF RADIATION IN A VERY EFFICIENT WAY. WHEN THE BEAM CROSSES THE CAVITY OF PROPER DIMENSIONS, IT WILL INTERACT WITH A SINGLE CAVITY MODE THEREBY RADIATING COHERENTLY AT THE MODE'S FREQUENCY. MODE GROWTH CONTINUES UNABATED UNTIL THE RF FIELDS ARE LARGE ENOUGH TO MODIFY THE BEAM O ...

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THE PROPOSED PROGRAM WILL ADDRESS THE CRITICAL NEEDS OF X-RAY/UV WAVELENGTH MIRROR TECHNOLOGY BY PROPOSING A NEW FABRICATION TECHNIQUE. CALLED ION ENHANCED MOLECULAR BEAM DEPOSITION, THIS TECHNIQUE IS CAPABLE OF FORMING HIGH REFLECTIVITY OPTICAL ELEMENTS BY VACUUM DEPOSITING ARTIFICIALLY STRUCTURED THIN FILM COATINGS. THIS UNIQUE APPROACH HAS PRECISE PROCESS CONTROL NECESSARY TO FORM STRUCTURALLY ...

INDEPENDENTS IN THE MID-CONTINENT AREA INCLUDING OKLAHOMA AND KANSAS, NEED A NEW AND NOVEL WATER SOLUBLE POLYMER FOR INDEPTH MOBILITY CONTROL IN ENHANCED OIL RECOVERY (EOR) PROCESSES AT INTERMEDIATE TEMPERATURES OF 165 TO 200 FAHRENHEIT. PARTIALLY HYDROLYZED POLYACRYLAMIDES AND NATURAL POLYMERS HAVE HISTORICALLY BEEN THE PRODUCTS USED IN THIS REGION. AND IN ESSENTIALLY ALL OF THE EARLIER EOR PROJE ...

A NOVEL, NONDESTRUCTIVE, LONGITUDINAL, CHARGED PARTICLE BEAMDIAGNOSTIC TOOL TO MEASURE LONGITUDINAL BEAM PROFILE AND CHARGE DENSITY DISTRIBUTION IS BEING STUDIED. THE CONCEPT IS BASED ON THE EFFECT OF MUTUAL ATTRACTIVE FORCES EXERTED BY THE PARTICLE BEAM ON A COLLINEAR ELECTRON BEAM OF MATCHEDVELOCITY. ANY MOVING CHARGED PARTICLE BEAM EXERTS AN ATTRACTIVE FORCE ON ELECTRONS IN ITS VICINITY. THIS F ...

BLENDS OF BIOBASED FIBER SOURCES ARE MANUFACTURED AND CHARACTERIZED BY ASPECT RATIO FOR OPTIMUM PERFORMANCE IN A BIOBASED GRAFT POLYMER AS MEASURED BY MECHANICAL PROPERTIES AND SURFACE MORPHOLOGY IN COMPRESSION MOLDED TEST SPECIMENS. FROM 18 FORMULATIONS OF BIOBASED GRAFT POLYMER, THREE ARE SELECTED ON THE BASIS OF BEST OVERALL PERFORMANCE AND USED IN A BIOBASED GRAFT POLYMER COMPOSITE STUDY IN CO ...

THE OBJECTIVE OF OUR PROJECT IS TO DEVELOP NEW MEANS OF PRODUCING SHORT LIVED RADIOISOTOPES FOR POSITRON EMISSION TOMOGRAPHY (PET). THIS MEDICAL DIAGNOSTIC TECHNIQUE IS CAPABLE OF DISCERNING AND IMAGING MEDICALLY INTERESTING PHENOMENA, SUCH AS THE ACTIVITY OF VARIOUS PARTS OF THE BRAIN, OXYGEN FLOW IN THE BODY, AND OTHER QUANTITIES WHICH ARE IMPOSSIBLE TO DETERMINE BY ANY OTHER DIAGNOSTIC TECHNIQU ...

ION SOURCES BASED ON VACUUM ARC TECHNOLOGY HAVE SEVERAL IMPORTANT ADVANTAGES. THEY CAN GENERATE A WIDE VARIETY OF METAL IONS, PRODUCE HIGH CURRENT FRACTIONS OF MULTIPLY-CHARGED IONS, AND ARE EASY TO OPERATE. UNFORTUNATELY, EXISTING ARC SOURCES HAVE TECHNOLOGICAL DRAWBACKS. A STABLE DISCHARGE REQUIRES HIGH CURRENT (>200A), LIMITING THE SOURCE PULSE LENGTH AND LIFETIME. IN THIS PHASE I PROJECT, IMPR ...

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THE UNCERTAINTY IN MEASURING NEUTRON DOSE EQUIVALENT RATES RESULTS IN UNCERTAINTY IN ASSIGNMENT OF THE PROPER DOSE TO OCCUPATIONAL RECORDS AND CAN RESULT IN IMPROPER IMPLEMENTATION OF CONTROLS TO LIMIT THE EXPOSURE. A NOVEL PORTABLE NEUTRON SPECTROMETER IS PROPOSED WHICH WILL REDUCE THE UNCERTAINTY OF SUCH MEASUREMENTS TO LESS THAN 20%. MANYCOMPONENTS OF THIS DEVICE ARE COMMERCIALLY AVAILABLE. SYS ...