Accession Number : ADP002123

Title :   High Voltage Solar Array Models and Shuttle Tile Charging,

Corporate Author : AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

Personal Author(s) : Rubin,A. ; Stevens,N. J.

Report Date : 25 JAN 1983

Pagination or Media Count : 3

Abstract : This paper described NASCAP/LEO (NASA Charging Analyzer Program/Low Earth Orbit) a 3-D computer code that simulates the interaction of space plasma with high-voltage solar arrays in the thin plasma sheath regime. The code requires information about the object and the ambient plasma. The geometric description, the material composition and the voltage distribution versus time of a solar array are the data required about the object. The plasma properties needed are the composition, density, and temperature. NASCAP/LEO will then provide the time-dependent current to each element of area of the array from the external plasma. The NASCAP/LEO output is provided in both three-dimensional computer graphics and in numerical form. NASCAP/LEO is user-oriented and wil provide potential distributions around the object, the currents to each of the conductors, and graphical details of the sheath and particle trajectories.

Descriptors :   *Machine coding, *Computerized simulation, *Plasmas(Physics), Three dimensional, Interactions, Plasma sheaths, High voltage, Space shuttles

Distribution Statement : APPROVED FOR PUBLIC RELEASE