Accession Number : ADP002113

Title :   Laboratory and Space Measurements of Materials,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB

Personal Author(s) : Fennell,J. F. ; Mizera,P. F. ; Leung,M. S.

Report Date : 25 JAN 1983

Pagination or Media Count : 17

Abstract : The SCATHA(Spacecraft Charging AT High Altitude) data has shown that several dielectric materials responded to the space environment differently than was expected prior to launch. For example, there was a marked increase in the bulk conductivity of Kapton samples that were exposed to the sun in the space vacuum. Teflon accumulated a permanent charge, which resulted in a potential difference that increased with time between it and the satellite frame. A quartz cloth thermal control material was observed to charge to higher levels on orbit than was obtained in pre-launch laboratory tests. Some of the differences between the expected and observed data have been explained by laboratory tests that more accurately model the space environment. (Author)

Descriptors :   *Electrical insulation, *Space charge, Dielectrics, High altitude, Electrical properties, Spacecraft, Laboratory tests, Measurement, Tetrafluoroethylene resins, Quartz

Distribution Statement : APPROVED FOR PUBLIC RELEASE