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AN EXPERIMENT IS PROPOSED TO DEMONSTRATE THAT TRANSIENT X-RAY RADIATION FROM THE PHYSICS INTERNATIONAL PULSERAD 1150 FLASH X-RAY MACHINE WILL CAUSE A REPRESENTATIVE HIGH TEMPERATURE SUPERCONDUCTING (HTS) DEVICE TO MALFUNCTION BY REVERTING TO NORMAL CONDUCTIVITY. INTEREST IN THIS PHENOMENON IS MOTIVATED BY THE ANTICIPATED INCORPORATION OF HTS THIN FILM TECHNOLOGY IN DEFENSE ELECTRONICS, ESPECIALLY ...

SDI SYSTEMS DESIGN AND OPERATIONS CAN BENEFIT FROM A BETTER UNDERSTANDING OF THE NUCLEAR PHENOMENOLOGY AT BURST ALTITUDES AROUND 1500 KM. SALVAGE FUZING OF INTERCEPTED WARHEADS COULD PRODUCE NUCLEAR EXPLOSIONS AT THESE ALTITUDES. KNOWLEDGE OF THE RESULTING NUCLEAR ENVIRONMENT CAN BE USED TO IMPROVE SDI SYSTEMS PERFORMANCE. FOR BURST ALTITUDES AROUND 1500 KM, EXPANDING DEBRIS IS EXPECTED TO SLOW PR ...

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ADVANCED MANEUVERING REENTRY SYSTEMS REQUIRE INSTALLATION OF A LARGE PHASED ARRAY ANTENNA IN THE VEHICLE SHELL STRUCTURE. THE LARGE PHYSICAL SIZE OF THE REQUIRED CUTOUT COMBINED WITH THE SEVERE MANEUVERING AND NUCLEAR AIRBLAST LOADS PLACE SEVERE DEMANDS ON THE STRUCTURAL ATTACHMENT BETWEEN THE WINDOW AND VEHICLE. WEIGHT IS CRITICAL AND THE WINDOW ASSEMBLY MUST BE CAPABLE OF BEING REMOVED AND REINS ...

HIGH ALTITUDE NUCLEAR THREATS GENERALLY REQUIRE THE USE OF OVERLAYS/UNDERLAYS TO ACHIEVE THE NUCLEAR SURVIVABILITY REQUIREMENTS OF ADVANCED REENTRY VEHICLES (RVS). MATERIALS AND FABRICATION PROCESSES EXIST THAT WITH SOME MINOR VARIATIONS SHOULD PRODUCE A HEATSHIELD MATERIAL THAT CAN EITHER ELIMINATE THE NEED FOR, OR REDUCE THE REQUIREMENTS OF, OVERLAYS/UNDERLAYS. THE PROPOSED MATERIAL, RELATIVE TO ...

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PROPOSED MILITARY OPTICAL SENSOR SYSTEMS WILL OPERATE IN ENVIRONMENTS WITH STRUCTURED EMITTING BACKGROUNDS PRODUCED BY NUCLEAR WEAPON BURSTS. IN GENERAL, THESE OPTICAL SENSORS WILL OPERATE AT NON-VISIBLEWAVELENGTHS FOR WHICH THERE HAVE BEEN NO MEASUREMENTS OF NUCLEAR PRODUCED BACKGROUNDS. MODELS OF AVERAGE NUCLEAR PRODUCED BACKGROUNDS HAVE BEEN DEVELOPED FROM THEORETICAL MODELS OF VOLUME EMISSION ...

ENVIRONMENTAL DISTURBANCES PRODUCED BY HIGH-ALTITUDE NUCLEAR DETONATIONS ARE WIDESPREAD AND PERSISTENT. DATA FROM ATMOSPHERIC TESTS (LATE 50'S, EARLY 60'S) PLUS EXTENSIVE RESEARCH EFFORTS ARE THE BASIC FOR UNDERSTANDING THE NUCLEAR ENVIRONMENT AND RESULTANT SYSTEMS EFFECTS. HOWEVER, ALL NUCLEAR TESTS AND MOST SUBSEQUENT BASIC RESEARCH HAVE INVOLVED ONLY SINGLE EXPLOSIONS. BALLISTIC MISSILE DEFENSE ...

MOST ANALYTICAL METHODS USED TO PREDICT THE BEHAVIOR OF TUNNELS SUBJECTED TO GROUND SHOCK REQUIRE MAKING JUDGMENTS REGARDING ACCEPTABLE LEVELS OF TANGENTIAL STRAIN AROUND THE TUNNEL SURFACE. THE CAPABILITY TO MEASURE DYNAMIC TANGENTIAL STRAINS ON THE SURFACES OF TUNNELS WOULD PROVIDE AN EXCELLENT MEANS OF DIRECTLY ASSESSING THE VALIDITY OF ANALYTICAL METHODS. THE OVERALL STUDY OBJECTIVE IS TO DEVE ...

THE PURPOSE OF THE PROPOSED EFFORT IS TO MODIFY AN EXISTING PAIDEVELOPED GAUGE SO THAT A) ITS OUTPUT SIGNALS ARE EASIER TO INTERPRET IN TERMS OF DISPLACEMENT, B) THE DISPLACEMENTS INFERRED ARE ACCURATE ENOUGH TO BE USED TO CORRECT BASELINE OFFSETS (E.G., OF ACCELEROMETERS), AND C) THE RANGE OF MEASURABLE DISPLACEMENT AMPLITUDES IS EXTENDED. THE GAUGE OPERATES BY MEASURING THE DISTANCE BETWEEN ITS ...