Results are presented of a laboratory investigation of discharges in spacecraft dielectrics using both a lowenergy electron and a combined low- and high-energy electron environment. Comparison of the charging and discharge characteristics indicates that the presence of high-energy electrons in space will result in significantly different behavior from that predicted for low-energy electron simulations alonge. For Kapton, fiberglass, and second-surface mirrors, the effect of the high-energy electron is primarily to increase the conductivity, thus often limiting surface potentials to below discharge threshold values. However, the magnitude of the charge blowoff is significantly smaller than that observed upon exposure to low-energy elctrons alone. Astroquartz, wich for low-energy elctron exposures exhibited no measurable charge blowoff, exhibited significant charge blowoff upon exposure to a combined high- and low-energy electron enviroment.


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    Title :

    The effects of high-energy electrons on the charging of spacecraft dielectrics


    Additional title:

    Effekt hochenergetischer Elektronen auf die Aufladung von Raumfahrzeugen Dielektrika


    Contributors:
    Treadaway, M.J. (author) / Mallon, C.E. (author) / Flanagan, T.M. (author) / Denson, R. (author) / Wenaas, E.P. (author)

    Published in:

    Publication date :

    1979


    Size :

    5 Seiten, 4 Bilder, 4 Tabellen, 2 Quellen


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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