Accession Number : ADP002120

Title :   The Threshold Temperature Effect in High-Voltage Spacecraft Charging,

Corporate Author : YORK UNIV DOWNSVIEW (ONTARIO)

Personal Author(s) : Laframboise,J. G. ; Kamitsuma,M.

Report Date : 25 JAN 1983

Pagination or Media Count : 16

Abstract : A new property of spacecraft surface materials, the threshold temperature for high-voltage charging, is defined. A table of threshold temperatures, calculated for various spacecraft surface materials, is presented. This property explains and unifies several recently-identified phenomena affecting spacecraft charging, including: the existence of multiple floating potentials for certain spacecraft surfaces in certain external environments; sensitivity effects in the numerical prediction of spacecraft potentials; sudden jumps in both observed and simulated spacecraft potentials in slowly-varying environments; and observed threshold effects in high-voltage charging. In addition, knowledge of the threshold temperature for proposed or existing surface materials provides a simple, effective way to evaluate their charging behavior when exposed to various space environments. (Author)

Descriptors :   *Space charge, *High voltage, *Temperature, *Threshold effects, *Computations, Spacecraft, Surfaces, Space environments

Distribution Statement : APPROVED FOR PUBLIC RELEASE