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THERE IS AN ESTABLISHED NEED FOR A SIMPLE ROBUST TRANSDUCER TO MEASURE PARTICLE VELOCITY IN SEVERE BLAST AND SHOCK ENVIRONMENTS SUCH AS NUCLEAR AND HIGH EXPLOSIVE TESTS. A GAGE CONCEPT IS PROPOSED FOR DEVELOPMENT, BASED ON THE PROVEN MEASUREMENT PRINCIPLES USED IN THE HIGHLY SUCCESSFUL DX GAGE, BUT RECONFIGURED MECHANICALLY AND ELECTRICALLY TO WITHSTAND THE HARSH SHOCK ENVIRONMENTS. THE CONCEPT RE ...

HIGH RANGE (200,000 G) ACCELEROMETERS ARE THE ONLY TRANSDUCERS THAT PROVIDE THE REQUIRED LONG-TERM DATA IN THE ENVIRONMENTS OF INTEREST TO THE BLAST AND SHOCK COMMUNITY. THESE GAGES HAVE A VERY LARGE DYNAMIC RANGE AND NOISE OFTEN MASKS THE LATE TIME (BUT EXTREMELY IMPORTANT) DATA. WE PROPOSE TO DEVELOP A CLOSE COUPLED LOGARITHMIC GAIN SIGNAL CONDITIONING SYSTEM THAT WILL CORRECT THE LATE TIME NOIS ...

CURRENT NUMERICAL COMPUTATIONS TO DESCRIBE NUCLEAR GROUND SHOCK ENVIRONMENTS, NUCLEAR CRATER FORMATION, IMPACT DYNAMICS AND PENETRATION MECHANISMS PRESENTLY EMPLOY EULERIAN-BASED FINITE DIFFERENCE CODES BECAUSE OF THEIR ABILITY TO MODEL THE MASS FLUX PHENOMENA IN TRACKING MATERIAL MOVEMENT THROUGH THE DISCRETIZED SPACE. THE FINITE DIFFERENCE CODES SUFFER IN COMPARISON TO FINITE ELEMENT CODES, HOWE ...

KTECH PROPOSES TO DEVELOP OPTICAL HOPKINSON BAR PRESSURE GAUGES FOR MEASUREMENT OF AIRBLAST ON UNDERGROUND NUCLEAR EVENTS. THE BARS WILL BE MADE OF SINGLE CRYSTAL SAPPHIRE WHICH HAS A MEASURED YIELD STRENGTH IN EXCESS OF 10 GPA. THESE GAUGES WILL HAVE A RISE TIME OF ABOUT 2 US OF DATA. DURING PHASE I, WE WILL CONSTRUCT AND CALIBRATE A STRESS-INDUCED BIREFRINGENCE GAUGE (SIBG) WHICH WOULD NEED NO E ...

UNDER THIS EFFORT, WE WILL DEVELOP A PORTABLE MEMORY TESTER UNIQUELY DESIGNED TO PERFORM THE TYPES OF TESTS REQUIRED FOR RADIATION EFFECTS CHARACTERIZATION. SPECIFICALLY, IT WILL PERFORM TESTS TO CHARATERIZE SINGLE EVENT PHENOMENA (SEP), TOTAL DOSE IONIZING EFFECTS, DOSE RATE, AND RAPID ANNEALING PHENOMENA. IT WILL COMBINE KEY FEATURES OF GENERAL PURPOSE ASIC TESTERS AND DEDICATED MEMORY TESTERS R ...

A NEWLY CONCEIVED SENSOR USES PULSED RF ENERGY CONDUCTED ALONG THE GROUND SURFACE TO IMMEDIATELY DETECT ANY OBJECT OR PERSON CROSSING A SELECTED AREA. THE SENSING ELEMENT IS THE GROUND ITSELF SINCE GROUND CONDUCTIVITY (RESISTANCE -1) CHANGES WHEN COMPRESSED BY THE WEIGHT OF AN OBJECT. USING ADVANCED SIGNAL PROCESSING TECHNIQUES, THE SENSOR TRANSLATES THE CHANGE IN GROUND CONDUCTIVITY INTO A WARNIN ...

ON A HORIZONTAL LINE-OF-SIGHT UNDERGROUND NUCLEAR TEST (UGT), THE MAXIMUM AREA FOR EXPERIMENTS TO BE EXPOSED TO DIRECT SHINE FROM THE WORKING POINT IS THE STUB PLATE AREA. USUALLY, THE REQUESTS FOR EXPOSURE AREA ARE GREATER THAN THE AVAILABLE AREA. EXPERIMENTS INVOLVING SOFT X-RAYS HAVE TO BE PLACED IN A DIRECT LINE OF SIGHT BECAUSE SOFT X-RAYS SCATTER POORLY AND SOMETIMES HIGHER FLUENCES ARE REQU ...

THE INTENT OF DOD INSTRUCTION 4245.4, "ACQUISITION OF NUCLEAR SURVIVAL SYSTEMS" IS TO PROVIDE FOR NUCLEAR SURVIVABILITY THROUGHOUT THE LIFE CYCLE OF WEAPON SYSTEMS WHICH ARE REQUIRED TO SURVIVE THE EFFECTS OF NUCLEAR WEAPONS. ONE KEY TO IMPLEMENTING THIS INTENT IS TO INSURE THAT ALL THE PEOPLE INVOLVED ARE FAMILIAR WITH THEIR RESPONSIBILITIES TO IMPLEMENT AND PRESERVE THIS SURVIVABILITY. THIS STUD ...

LOW-ENERGY LASER TECHNOLOGY HAS THE POTENTIAL TO SIGNIFICANTLY IMPROVE THE EFFENCIENCY AND EFFECTIVENESS OF NUCLEAR WEAPONS SECURITY OPERATIONS. SUCH LASERS, EMPLOYED IN EITHER AUTOMATED OR REMOTELY MANNED CONFIGURATIONS, CAN SUPPLEMENT CURRENT PHYSICAL SECURITY MEASURES BY PROVIDING THREE NON-LETHAL RESPONSE OPTIONS: (1) WARN INTRUDERS THAT THEY HAVE BEEN DETECTED AND ARE ENTERING A SECURE AREA, ...

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