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  • 1980-1984  (2)
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  • 1
    facet.materialart.
    Unknown
    Radiation effects response data for synthetic organic insulation and dielectrics (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Existing radiation response data for 130 materials of the synthetic organic insulation and dielectric class are analyzed, and thresholds and 25-percent change dose levels for these materials are presented. Both the lowest reported threshold dose (LTD) and the 25-percent change dose level are found to vary widely among the different insulators (used as spacecraft components). The LTD is tabulated to indicate the levels where radiation effects become apparent. These level are of use in setting a lower limit where changes can be expected, and could be used to exempt synthetic insulation and dielectrics from radiation considerations when the environments are substantially below this limit. Cautions to be observed in applying the data to current problems are presented.
    Keywords: NONMETALLIC MATERIALS
    Type: IEEE Transactions on Nuclear Science (ISSN 0018-9499); NS-31; 1387-139
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Packaging techniques for low-altitude Venus balloons beacon (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The results of a specific design project for the Venus balloon beacon, in which a microwave beacon is required to operate for a limited time at high temperature (350 C) and at high pressure, (10 bars). In a chemically hostile environment after surviving large mechanical shock forces (up to 280 gs) are discussed. It was found that many existing, commerically-available component can be used in such a design with only minor modifications. A further result is that a crude (and consequently low-cost) test program can be designed to identify and select promising commercial components.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA. Lewis Research Center Proc. of the Conf. on High Temp. Electron.; p 117-121
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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