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  • SPACECRAFT INSTRUMENTATION  (2)
  • Acetylcholine release
  • 1980-1984  (2)
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  • 1
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    The UH-nuclei cosmic ray detector on the third High Energy Astronomy Observatory (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The third High Energy Astronomy Observatory satellite (HEAO-3) carries a particle telescope for the detection of highly charged cosmic ray nuclei. These nuclei, which have Z equal to or greater than 28, are much rarer than the lower charged nuclei in the cosmic radiation. As a consequence, this particle telescope was required to have a large collecting area as well as an ability to resolve individual elements. This paper describes the telescope, composed of large area parallel plate ionization chambers, multiwire ion chamber hodoscopes and a Cherenkov radiation detector. The resulting telescope has a total geometry factor of 59,000 sq cm sr and is capable of measuring the charges of nuclei in the range Z = 14-120.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Nuclear Instruments and Methods; 185; 1981
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The non-Z-squared response of the heavy nuclei cosmic ray detector on HEAO-3 (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A combination of ion chambers and Cerenkov radiators similar to the Heavy Nuclei Experiment flown on HEAO-3 was calibrated at the Bevalac heavy-ion accelerator using beams of Mn-25 nuclei at kinetic energies up to about 1700 MeV/nucleon and Au-79 nuclei up to about 1000 MeV/nucleon. The data show only a small deviation (about 2-3 charge units at Au) from the Z-squared scaling used previously (Binns et al., 1981, 1982, 1983) to analyze the HNE data. Although at lower energy, the calibration indicates that the published relative abundances of the Sn-50/Ba-56 group and the published upper-limit actinide abundances are not likely to be significantly affected by non-Z-squared effects.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: International Cosmic Ray Conference; Aug 22, 1983 - Sep 03, 1983; Bangalore; India
    Format: text
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    NASA TECHNICAL REPORTS
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