Specialty Instrumentation
Raytheon Ktech has extensive experience evaluating the dynamic response of materials and structures exposed to blasts, explosions, fire, and other energetic stimuli. Our experience in the design, implementation, and analysis of military weapon effects testing has enabled us to develop innovative sensors, measurement techniques and simulations for a variety of applications.
Impulse Gauges in Saturn
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Stress Gauges Mounted in a Saturn Prs Experiment
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PIEZOELECTRIC SHOCK SENSORS AND GAUGES
Raytheon Ktech supplies piezoelectric shock sensors and a number of piezoelectric gauge assemblies. Therefore, a customer has the option of building the sensors into his own test assembly or buying a complete gauge assembly that can be customized if required. Both crystal and thin film polymer piezoelectric materials are available.
See Technical Specifications for all PVDF sensors.
Crystal Transducers
Thin Film Transducers
Raytheon Ktech's thin film tranducers use the piezoelectric polymer polyvinylidine flouride. We are the North American agent for and part owner of Piezotech SA, the only company licensed to manufacture PVDF sensors using the Bauer hysteretic poling method.
OPTICAL IMPULSE GAUGES
Raytheon Ktech has developed the Optical Impulse Gauge (OIG) for the measurement of blowoff impulse in radiation simulators.
The OIG is mounted in a secondary enclosure using a rubber shock isolation system to to isolate the system from radiation simulator machine shock. This secondary enclosure is placed behind a debris shield that shields the enclosure from radiation and retards the expansion of source and filter debris. Without the debris shield, early radiation/debris induced motions of the secondary enclosure severely limit the useful data obtained from the OIG.
Optical Impulse Gauge Technical Description
The OIG measures impulse by monitoring the equilibrium velocity of a known mass that is free to move along on axis. The sample holder/carriage is 31-mm long and weighs approximately 25 grams. The carriage slides on a miniature ball slide. The short axial length of the carriage allows it to equilibriate within 50µs of the stimulus. The impulse gauge employs a simple, but high resolution optical position encoder. Each OIG produces two outputs that are out of phase (quadrature) so that carriage reversal can be detected. The OIG requires a signal conditioning unit and power supply that are located outside the simulator test chamber. A shielded seven conductor cable is used to communicate between the signal conditioner and the OIG.
The OIG has an impulse resolution of 100 tap and a 50-µs time resolution. High impulses can be measured by selecting an appropriate carriage mass. The carriage is designed to accept supplementary weights. Typical recording times range from 500 to 1000 µs.
Specifications:
- Measures blowoff impulse in radiation simulators
- Impulse resolution of 100 tap
- 50 µs time resolution
- Typical recording timers range form 500 to 1000 µs
- Primary and secondary housing shield gauge from radiation, isolates system from simulator machine shock and retards the expansion of source and filter debris
CALORIMETRY
Applied Physics and Testing has the specialized expertise to provide accurate diagnostics for pulsed radiation sources. We have developed wide x-ray calorimeters to diagnose soft x-ray, Bremsstrahlung, electron and neutron radiation sources. Custom designs are our specialty.
Small array fo carbon total
stopping calorimeters
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Total Stopping Calorimeters
Total stopping calorimeters measure the total incident radiation.
Thin foil calorimeter
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Thin Foil Calorimeters
Thin film calorimeters measure local dose in specific materials.
Thermo-elastic Calorimeters
Thermoelectric calorimeters (TEC) measure fluence and deposition profiles in selected locations.
