Accession Number : AD0809304

Title :   PLASMA PROPERTIES OF SELECTED ELECTROMAGNETIC WINDOW MATERIALS.

Descriptive Note : Technical rept. Oct-Dec 66,

Corporate Author : AIR FORCE WEAPONS LAB KIRTLAND AFB NM

Personal Author(s) : Young, Jimmie D.

Report Date : MAR 1967

Pagination or Media Count : 43

Abstract : Pyrolitic boron nitride and slip-cast fused silica, materials used in reentry vehicle windows that are transparent to electromagnetic signals, are studied for their effects upon the plasma sheath surrounding a reentry vehicle. Ionized specie concentrations have been calculated for electromagnetic window material and air mixtures, using a modification of the JPL thermochemical equilibrium computer program. The results of this study indicate that the ionization of these ablating window materials is comparable to or exceeds the ionization produced by ablating heat-shield materials. (Author)

Descriptors :   *REENTRY VEHICLES), (*PLASMA SHEATHS, (*REENTRY VEHICLES, ELECTROMAGNETIC RADIATION), (*WAVE PROPAGATION, PLASMA SHEATHS), BOUNDARY LAYER, ABLATION, SILICON DIOXIDE, BORON ALLOYS, NITRIDES, IONIZATION, PRODUCTION, ELECTRONS, SLIP CASTING, THERMODYNAMICS.

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE