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THE OBJECTIVE OF THIS PROJECT IS TO EMPLOY THE BETATRON PRINCIPLE TO PRODUCE AN INEXPENSIVE ELECTRON ACCELERATOR CAPABLE OF PRODUCING 20-50 MEV ELECTRONS WITH GOOD BEAM QUALITY AND HIGH-AVERAGE CURRENTS OF UP TO 5-50 MUA. IN CONVENTIONAL BETATRONS WHICH HAVE BEEN IN EXISTENCE FOR OVER 50 YEARS, EDDY-CURRENT LOSSES IN THE IRON LIMIT THE OPERATING FREQUENCY, THUS LIMITING THE MAXIMUM ENERGY AND CUR ...

PARAMETRIC X-RADIATION (PXR) IS PROPOSED AS AN INTENSE, TUNABLE, MONOCHROMATIC HARD-X-RAY SOURCE FOR THE DETECTION OF EXPLOSIVES. THIS RADIATION IS HIGHLY COLLIMATED, HAS A BANDWIDTH OF 0.1, AND AN INTENSITY EQUAL TO THAT OF SYNCHROTRON RADIATION ON A PER ELECTRON BASIS. PXR GENERATION IS ACHIEVED BY PLACING CRYSTALS INTO THE PATH OF ELECTRON BEAMS WITH ENERGY OF 6 MEV OR GREATER. THE VIRTUAL PHOT ...

THIS STUDY WILL EVALUATE THE RANGE OF SHIP SIZES AND POWER LEVELS (SPEEDS) TO DETERMINE THE OPTIMUM SHIP CHARACTERISTICS FOR OPERATING U.S. FLAG RO/RO SHIPS IN U.S. COASTAL SERVICE. RO/RO CARGO HANDLING TECHNIQUES PREVALENT IN EUROPE AND SCANDINAVIA WILL BE INCORPORATED AS A FUNDAMENTAL ELEMENT OF THE SERIES OF SHIPS INVESTIGATED. THESE TECHNIQUES INVOLVE THE USE OF CASSETTES TO HANDLE CONTAINERS ...

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PHASE I ADDRESSES A NEW APPROACH FOR THE DESIGN OF HIGH POWER NUCLEAR TARGETS USED FOR PRODUCTION OF RADIOISOTOPES BY HIGH ENERGY CHARGED PARTICLE BEAMS, NOTABLY HIGH ENERGY PROTONS. SUCH TARGETS WILL YIELD LARGER QUANTITIES OF RADIOACTIVE SPECIES THAN PRESENTLY AVAILABLE, EITHER FOR BASIC RESEARCH (E.G., STUDIES USING RADIOACTIVE BEAMS) OR FOR APPLIED PURPOSES (E.G., PRODUCTION OF MEDICAL RADIOI ...

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THE OVERALL GOAL IS TO DEVELOP LOW COST "SMART" SENSORS FOR HARD X-RAYS SUITABLE FOR USE WITH MINIMALLY INTRUSIVE EMPLACEMENT SYSTEMS SUCH AS CONE PENETROMETERS AND PORTABLE INSTRUMENTS. THE SENSORS WILL EFFICIENTLY MEASURE ENERGY SPECTRA UP TO 300KE V, AN IMPORTANT RANGE FOR SPECTROSCOPIC DETERMINATION OF THE ACTINIDE RADIOISTOPES AND FOR X-RAY FLUORESCENCE OF HEAVY METALS. THE SENSORS WILL INC ...

THE INDENTIFICATION AND QUANTIFICATION OF TOXIC CHEMICALS IS ESSENTIAL FOR THE COST-EFFECTIVE REMEDIATION OF HAZARDOUS WASTE SITES. THE DEVELOPMENT OF A CHEMICAL MICROINSTRUMENT IS PROPOSED FOR ENVIRONMENTAL ANALYSIS: A SILICON CHIP CONTAINING MULTIPLE MICROMACHINED COMPONENTS THAT WORK TOGETHER TO ATTAIN THE HIGH SELECTIVITY AND SENSITIVITY CHARACTERISTIC OF CONVENTIONAL ANALYTICAL INSTRUMENTS. ...