Spacecraft charging in plasma and radiation environments is a temperature dependent phenomenon due to the reduction of electrical conductivity in dielectric materials at low temperatures. Charging time constants are proportional to l/conductivity may become very large (on the order of days to years) at low temperatures and accumulation of charge densities in insulators in charging environments traditionally considered benign at ambient temperatures may be sufficient to produce charge densities and electric fields of concern in insulators at low temperatures. Low temperature charging is of interest because a number of spacecraft-primarily infrared astronomy and microwave cosmology observatories-are currently being design, built, and or operated at very cold temperatures on the order of 40K to 100K. This paper reviews the temperature dependence of spacecraft charging processes and material parameters important to charging as a function of temperature with an emphasis on low temperatures regimes.


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    Title :

    Spacecraft Charging in Low Temperature Environments


    Contributors:

    Conference:

    45th AIAA Aerospace Science Meeting ; 2007 ; Reno, NV, United States


    Publication date :

    2007-01-11


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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