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  • 1
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    Interplanetary dust experiment (A0201) (1984)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The objective of this experiment is to study interplanetary dust, variously referred to as cosmic dust, cometary dust, zodiacial dust, or meteoric dust particles. Specific objectives are to obtain information regarding particle mass and velocity, and to undertake correlative analyses with other experiments, both on LDEF or near the time of the LDEF flight.
    Keywords: ASTROPHYSICS
    Type: Long Duration Exposure Facility (LDEF); p 134-135
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A fail safe laser activated switch used as an emergency control link at the Langley Vortex Research Facility (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A fail safe light activated switch was used as an emergency control link at the Langley Vortex Research Facility. In this facility aircraft models were towed through a still air test chamber by a gasoline powered vehicle which was launched from one end of a 427-meter track and attained velocities to 31 m/sec in the test chamber. A 5 mW HeNe laser with a mechanical copper provided a connecting link with the moving tow vehicle on which a silicon photodiode receiver with a specially designed amplifier provided a fail safe switching action. This system provided an emergency means of stopping the vehicle by turning off the laser to interrupt the power to the vehicle ignition and brake release systems.
    Keywords: LASERS AND MASERS
    Type: NASA-TM-78752
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Camera add-on records time of exposure (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Time photograph is taken and is permanently recorded on edge of exposure by compact electronics module that attaches to camera case. Single-chip timing circuit drives LED display, which is imaged on film plane. Normally blanked display is unblanked when shutter switch is activated.
    Keywords: PHYSICAL SCIENCES
    Type: LAR-12635 , NASA Tech Briefs (ISSN 0145-319X); 5; 2; P. 168
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Measuring projectile speed (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Apparatus uses optoelectric detector to measure station-to-station time-of-flight of small spherical aluminum projectile down steel barrel. Instrument has been used to study impact resistance of composite materials used in aircraft structural research program.
    Keywords: MECHANICS
    Type: LAR-12387 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 571
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    NASA TECHNICAL REPORTS
  • 5
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    Characteristics of capacitor-type micrometeoroid flux detectors when impacted with simulated micrometeoroids (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A series of impact tests are described and data presented which characterize the operation of the capacitor-type micrometeoroid flux detectors used on the Meteoroid Technology Satellite (MTS). Capacitor-type detectors with silicon dioxide dielectric thickness of 0.4 and 1.0 microns were tested in the micrometeoroid impact simulator at the Langley Research Center, a 4-MV Van de Graaff electrostatic accelerator. The carbonyl iron projectiles were from 0.5 to 5.0 microns in diameter with velocities from 4 to 10.0 km/sec. The detector bias voltage was varied from -20 to -60 V; some tests were at detector temperatures of 90 C to -100 C; and the angle of impact varied from 0 deg to 75 deg from the normal to the detector. These tests showed that: (1) the detector operation is reliable when the bias voltage is greater than 30 V; (2) after an impact the detector returns to its original condition with an insignificant loss of active area; and (3) the sensitivity of the detector is inversely proportional to the detector thickness. The test results suggest a theoretical model in which the signal is an arc triggered by the impacting projectile, and the detector bias voltage must be high enough to insure that an arc will form.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TN-D-7359 , L-8962
    Format: application/pdf
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  • 6
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    An ultra-high-speed photographic system for investigating hypervelocity impact phenomena (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Ultrahigh speed photographic system for photographing hypervelocity projectiles and impact phenomena
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TN-D-6128 , L-7464
    Format: application/pdf
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  • 7
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    Evaluation of a flash X-ray technique for recession measurements in ablative materials (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Flash X ray to determine recessions in ablative materials
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-TN-D-5669 , L-6764
    Format: application/pdf
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  • 8
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    Flash X-ray technique for recession measurements in ablating models. (1969)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Flash X ray unit with special film transport devices to obtain sequenced dynamic radiographs of ablating models during reentry simulation tests
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Type: ICIASF ''69, INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES; May 05, 1969 - May 08, 1969; FARMINGDALE, NY
    Format: text
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