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  • Biology
  • INSTRUMENTATION AND PHOTOGRAPHY
  • MACHINERY
  • 1990-1994  (3)
  • 1970-1974  (2)
  • 1
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    Cosmic X-ray spectroscopy with multilayer optics (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Multilayer optics operated at normal incidence offer a powerful new technology for the study of the solar spectrum in the XUV. The spectra of most cosmic X-ray sources are strongly extinguished at wavelengths above 40 A due to absorption and scattering by interstellar grains. We describe a number of configurations which allow multilayer optics to be used at nonnormal angles of incidence in conjunction with grazing incidence optics to analyze the spectra of cosmic X-ray sources in the wavelength interval between 1.5 and 40 A. These optical configurations utilize both multilayer mirrors and gratings, and permit the efficient observation of extended sources using stigmatic spectrographs. The response of the instruments described to typical cosmic X-ray sources is also discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: In: Multilayer and grazing incidence X-ray(EUV optics; Proceedings of the Meeting, San Diego, CA, July 22-24, 1991 (A93-39658 15-74); p. 333-344.
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Thermoprobe - An instrument for determining the temperature of opaque, translucent, and transparent surfaces in the incandescent temperature range. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments; 43; Aug. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Improved burst disk/cutter assembly (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Burst disk/cutter, prewelded before assembly, eliminates external leakage into a vacuum annulus and provides a means for more accurate burst-pressure prediction. Two reverse buckling type configurations are described and test results are given.
    Keywords: MACHINERY
    Type: KSC-10516
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Monitoring Bearing Vibrations For Signs Of Damage (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Real-time spectral analysis of vibrations being developed for use in monitoring conditions of critical bearings in rotating machinery. Underlying concept simple and fairly well established: appearance and growth of vibrations at frequencies associated with rotations of various parts of bearing system indicate wear, damage, and imperfections of manufacture. Frequencies include fundamental and harmonics of frequency of rotation of ball cage, frequency of passage of balls, and frequency of rotation of shaft.
    Keywords: MACHINERY
    Type: MFS-29734 , NASA Tech Briefs (ISSN 0145-319X); 15; 12; P. 78
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Monitoring Engine Vibrations And Spectrum Of Exhaust (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Real-time computation of intensities of peaks in visible-light emission spectrum of exhaust combined with real-time spectrum analysis of vibrations into developmental monitoring technique providing up-to-the-second information on conditions of critical bearings in engine. Conceived to monitor conditions of bearings in turbopump suppling oxygen to Space Shuttle main engine, based on observations that both vibrations in bearings and intensities of visible light emitted at specific wavelengths by exhaust plume of engine indicate wear and incipient failure of bearings. Applicable to monitoring "health" of other machinery via spectra of vibrations and electromagnetic emissions from exhausts. Concept related to one described in "Monitoring Bearing Vibrations For Signs Of Damage", (MFS-29734).
    Keywords: MACHINERY
    Type: MFS-29733 , NASA Tech Briefs (ISSN 0145-319X); 15; 12; P. 79
    Format: text
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    NASA TECHNICAL REPORTS
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