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  • 1
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    The Voyager Cosmic Ray Experiment (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The Voyager Cosmic Ray Experiment includes seven dE/dx-E telescopes to measure the energy and charge of particles with atomic numbers from 1 to 26 in the energy range 1-500 MeV/nucleon and to measure electron energy in the range from 3 to 110 MeV. Isotopic composition of hydrogen through sulfur in the range up to 75 Mev/nucleon can also be resolved. The electronic systems include a dual-gain, charge sensitive preamplifier, 4096-channel pulse height analyzers for three parameter analysis of selected events, and an event type readout polling scheme to maximize the use of available telemetry space and to enhance the occurrence of rare events in the data. Details of the detector, electronic and mechanical design are presented.
    Keywords: SPACECRAFT INSTRUMENTATION
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    NASA TECHNICAL REPORTS
  • 2
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    The UH-nuclei cosmic ray detector on the third High Energy Astronomy Observatory (1981)
    In:  Other Sources
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    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
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  • 3
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    A cosmic ray isotope spectrometer (1978)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The paper describes a new instrument to be flown on ISEE-C which is optimized to measure the isotopic composition of solar and galactic cosmic rays in the 5-250 MeV/nucleon range. A mass resolution of not greater than 0.3 AMU should be achieved for all elements with charge Z not exceeding 30.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: IEEE Transactions on Geoscience Electronics; GE-16; July 197
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  • 4
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    The non-Z-squared response of the heavy nuclei cosmic ray detector on HEAO-3 (1983)
    In:  Other Sources
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    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
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  • 5
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    The Galileo heavy element monitor (1992)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The Heavy Ion Counter on the Galileo spacecraft will monitor energetic heavy nuclei of the elements from C to Ni, with energies from about 6 to about 200 MeV/nucl. The instrument will provide measurements of trapped heavy ions in the Jovian magnetosphere, including those high-energy heavy ions with the potential for affecting the operation of the spacecraft electronic circuitry. The instrument, which is a modified version of the Voyager CRS instrument, is described.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: Space Science Reviews (ISSN 0038-6308); 60; 1-4,; 305-315
    Format: text
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