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THIS RESEARCH PROJECT WILL DEMONSTRATE THE TECHNICAL AND ECONOMIC FEASIBILITY OF A MAGNETIC SEPARATOR FOR OPERATION ON PULVERIZED COAL. A THEORETICAL COMPARISON OF THE SEPARATOR WITH WORK PUBLISHED ON OPEN GRADIENT MAGNETIC SEPARATION BY THE OAK RIDGE NATIONAL LABORATORY INDICATES THAT THE SEPARATOR WILL HAVE HIGH LEVELS OF ASH CLEANING. THIS IS BECAUSE OF ITS COUNTERCURRENT PRINCIPLE OF OPERATION ...

THIS STUDY WILL ATTEMPT TO DEVELOP A HIGH-RESOLUTION, INFRARED INSTRUMENT TO MONITOR CONCENTRATION LEVELS OF INDIVIDUAL ALKALI MOLECULAR SPECIES IN COMBUSTOR GAS STREAMS. THE FORMATION OF ALKALI SULFATES ON HOT COMBUSTOR SURFACES LEADS TO SEVERE CORROSION AND FOULING, RAISING OPERATING COSTS AND REDUCING EFFICIENCY. A MONITOR OF THE DOMINANT GAS-PHASE ALKALIS WOULD AID DEVELOPMENT OF MEASUREMENTS ...

THERE IS A NEED FOR AN INEXPENSIVE, COMPACT, LOW MAINTENANCE SUB-PICOSECOND OPTICAL PULSE SOURCE TO DRIVE AN OPTICALLY SAMPLED AND TRIGGERED OSCILLOSCOPE. ADEQUATE LASER SOURCES PRESENTLY OCCUPY TEN SQUARE FEET AND REQUIRE REGULAR MAINTENANCE, 20 KW OF ELECTRICITY, AND COOLING WATER; AND THEY COMPRISE THE MAIN COST ITEM IN THE PICOSECOND OSCILLOSCOPE. THE NEW PULSED LASER UNDER DEVELOPMENT IN THIS ...

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POSITRON EMISSION TOMOGRAPHY (PET) IS A NONINVASIVE MEDICAL IMAGING TECHNIQUE THAT PROVIDES A THREE-DIMEN- SIONAL IMAGE OF RADIOPHARMACEUTICALS DISPERSED IN THE BODY. IT IS BECOMING AN IMPORTANT FUNDAMENTAL TOOL FOR BOTH CLINICAL DIAGNOSIS AND MEDICAL RESEARCH. THE HEART OF THIS INSTRUMENT IS A LARGE ARRAY OF NUCLEAR DETECTORS MOSTLY CONSISTING OF SCINTILLATOR CRYSTALS COUPLED TO PHOTOMULTIPLIER T ...

ONE OF THE MOST ACTIVE AND CHALLENGING FIELDS IN MOLECULAR BIOLOGY TODAY IS THE GENETIC STUDY OF EUKARYOTIC SYSTEMS. THE PRELIMINARY, BUT OFTEN RATE LIMITING, STEPS IN THIS AREA ARE THE DNA TRANSFER/HYBRIDIZATION TECHNOLOGIES ASSOCIATED WITH GENE MAPPING, AND THE SCREENING OF DNA LIBRARIES FOR GENE ISOLATION. THESE PROCEDURES USE RADIOLABELED HYBRIDIZATION TECHNIQUES AND AUTORADIOGRAPHY TO ACHIEVE ...

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THE TARA TANDEM MAGNETIC MIRROR AT M.I.T. WILL PLAY AN IMPORTANT ROLE IN THE MIRROR FUSION RESEARCH PROGRAM. IT WILL TEST THE EFFICACY OF A MAGNETIC CONFIGURATION WHICH IS DIFFERENT FROM THOSE OF OTHER LEADING MIRROR DEVICES (SUCH AS TMX-U AND MFTF-B), AND IT WILL BE USED FOR STUDYING BASIC PHYSICAL PROCESSES WHICH IT SHARES WITH OTHER TANDEM MIRRORS. IMPORTANT CHARACTERISTICS OF THE ELECTRON AND ...

RECENTLY CONCEIVED RADIATION TRANSPORT ANALYSIS TECHNIQUES WILL BE STUDIED TO ASSESS THEIR USE IN SPACE NUCLEAR POWER SHIELD DESIGN OPTIMIZATION. THE ULTIMATE AIM IS TO DETERMINE OPTIMAL COMPOSITIONS AND CONFIGURATIONS OF SHIELD COMPONENTS FOR THE PRO- TECTION OF SPACE SYSTEMS AGAINST MIXED RADIATION FIELDS FROM INTERNAL AND EXTERNAL SOURCES. PARTICULAR ATTENTION WILL BE PAID TO USING COMPOSITE AN ...