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  • Other Sources  (2)
  • INSTRUMENTATION AND PHOTOGRAPHY  (2)
  • AERODYNAMICS
  • AEROSPACE MEDICINE
  • Chemistry
  • 1995-1999
  • 1985-1989
  • 1975-1979
  • 1970-1974  (2)
  • 1972  (2)
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  • 1995-1999
  • 1985-1989
  • 1975-1979
  • 1970-1974  (2)
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  • 1
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    Unknown
    Electronic systems for the new multichannel spectrometer at Sacramento Peak. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Description of the design features and operation of a new multichannel solar spectrometer to be used for ground-based observations of active regions whose X-ray and EUV emissions are studied by the OSO-H and other satellites. The electronic systems associated with the instrument include (1) an electrooptical guider controlled by a punched paper tape capable of making raster scans of selected portions of the solar disk, (2) a programmer unit that applies paper-tape commands to various portions of the instrument, (3) a closed-loop servosystem for the vacuum heliostat, (4) stepping motor controls for spectral scans, (5) a 40-channel photomultiplier readout, and (6) a magnetometer. Preliminary solar observations indicate satisfactory performance of the system.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    A graphite crystal polarimeter for stellar X-ray astronomy. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The first crystal X-ray polarimeter to be used for X-ray astronomy is described. Polarization is measured by modulation of the X rays diffracted at an average 45 deg glancing angle from large, curved graphite crystal panels as these rotate about an axis parallel to the incident X-ray flux. Arrangement of the crystal panels, the design of the detector, and the signal-processing circuitry were optimized to minimize systematic effects produced by off-axis pointing of the rocket and cosmic ray induced events. The in-flight performance of the instrument in relation to the observed background signal is discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments; 43; July 197
    Format: text
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    NASA TECHNICAL REPORTS
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