Accession Number : ADA130043

Title :   Numerical Simulation of Spacecraft Charging Phenomena at High Altitude.

Descriptive Note : Final rept. 1 Mar 76-31 Aug 81,

Corporate Author : YORK UNIV DOWNSVIEW (ONTARIO) CENTRE FOR RESEARCH IN EXPERIMENTAL SPACE SCIENCE

Personal Author(s) : Laframboise,J G ; Kamitsuma,M ; Prokopenko,S M L ; Chang,Jen-Shih ; Godard,R

PDF Url : ADA130043

Report Date : 10 Aug 1982

Pagination or Media Count : 57

Abstract : This report describes work done under grant AFOSR-76-2962. This work has included the development of computer programs for simulating spacecraft charging at three levels of complexity: LOCHG, a relatively simple local-charging calculation; CYLVIA, a two-dimensional simulation program for treating cylindrical spacecraft cross-sections, and XYCIC, a simulation program for the treatment of a larger variety of two-dimensional geometries. This work has also included studies of two physical phenomena which are fundamental to an improved understanding of spacecraft charging: the threshold temperature effect and the barrier effect. Also included is a derivation of two results which appear likely to be of use in future simulation studies: an analytic expression for photoelectron currents on surfaces with variable illumination in electric fields, and a perturbation technique for calculating space-charge density and flux along particle orbits. (Author)

Descriptors :   *Space charge, *Spacecraft components, Space systems, High altitude, Ion density, Computerized simulation, Numerical analysis, Photoelectric emission

Subject Categories : Atmospheric Physics
      Electricity and Magnetism
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE