Award Data

Certain lanthanide halides have significantly higher light output than NaI:Tl, the comparison standard for scintillators, plus other important properties, including fast decay times and excellent proportionality. Unfortunately, lanthanide halides grown by traditional melt processes have high production costs and limited availability. Crystals are usually limited to about 5 cm x 5 cm, right cylinde ...

It is proposed to develop a novel process for growth of high quality CZT crystals for nuclear detection applications. Currently the THM process is the technology of choice for production of high quality CZT crystals. This process, however, suffers from extremely low growth rates. The development effort proposed here will seek to increase the crystal growth rate by 5-10 times the current levels ...

Three nuclides are especially useful in detecting thermalized neutrons: helium-3, lithium-6 , and boron-10. Since current demand will deplete reserves of helium-3 in roughly two years, there is a large desire to develop detectors that have the capacity to replace helium-3 tubes. In this proposal we spell out our plan to adapt Neotron''s already developed fission neutron detector into a high effic ...

THE PROPOSED FIBLOC SENSOR PROVIDES AN ECONOMIC MEANS TO PROTECT, LITERALLY, MILES OF A PREFERRED PERIMETER REGION AGAINST UNAUTHORIZED INTRUSIONS. THE OPTICAL FIBERS EMPLOYED INT HE FIBLOC SENSOR PROPAGATE CW OR PULSED INFRARED LIGHT SIGNALS WHOSE TRANSMISSION AND/OR REFLECTION SENSITIVITY IS AFFECTED BY MECHANICAL PRESSURE SUCH AS WOULD BE PRODUCED BY THE DISTENSION OF SURFACED MOUNTED FIBERS AL ...

IMPULSE RADAR WHICH DERIVES ITS "MAIN BANG", A TRANSIENT, BY EXCITING AN ANTENNA CAVITY WITH A SUBNANOSECOND PULSE HAS BEEN SHOWN TO BE VERY EFFECTIVE FOR INTRUSION DETECTION. A RECENT SBIR PROGRAM COMPLETED FOR DNA RESULTED IN THE DEVELOPMENT OF A NEW LOW COST, LIGHT WEIGHT, RADAR SENSOR FOR THE PROTECTION OF NUCLEAR SITES NOW BEING MARKETED COMMERCIALLY. DURING THE DNA FIELD EXPERIMENTS ON ANIMA ...

THE PHASE I EXPERIMENTAL EFFORT WILL DEMONSTRATE THE FEASIBILITY OF A FIELD WORTHY GROUND MOTION SENSOR TO REPLACE PIEZO-ELECTRIC ACCELEROMETERS FOR CONVENTIONAL EXPLOSIVES AND NUCLEAR TESTING. THE OUTPUT SIGNALS OF PIEZO-ELECTRIC ACCELEROMETERS MUST BE INTEGRATED TWICE TO DETERMINE GROUND MOTIONS. THIS PROCESS REDUCES SYSTEM ACCURACY AND MEASUREMENT BANDWIDTH. ADDITIONALLY, AS PIEZO-ELECTRIC SENS ...

20 TON SPHERICAL EXPLOSIVE CHARGES MADE FROM MOLDABLE EXPLOSIVES HAVE BECOME INCREAINGLY IMPORTANT TO DNA'S ABOVEGROUND TEST PROGRAMS. THESE CHARGES PROVIDE LONGER DURATION FREE FIELD PRESSURE SIGNALS THAN CAN BE PRODUCED IN THE UNDERGROUND TEST ENVIRONMENT. THE SAFETY OF MANUFACTURING THESE 20 TON SPHERICAL CHARGES COULD BE GREATLY ENHANCED THROUGH THE DEVELOPMENT OF FIBER OPTIC BASED INSTRUMENTA ...

FIBER OPTICE ELECTRIC FIELD MEASUREMENT SYSTEMS OFFER ELECTROMAGNETIC PULSE AND ELECTROMAGNETIC INTERFERENCE IMMUNITY THAT IS NOT PROVIDED BY STANDARD ELECTRON BASED INSTRUMENTATION. TO DATE FIBER OPTIC BASED ELECTRIC FIELD MEASUREMENT SYSTEMS HAVE BEEN USED MOSTLY IN ABOVEGROUND TEST APPLICATIONS. IN THE UNDERGROUND TEST ENVIRONMENT, SENSORS ARE EXPOSED TO A HARSH RADIATION ENVIRONMENT. TECHNIQUE ...

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