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STUDY OF A TRACER METHOD FOR SOLID PROPELLANTS. SPECTROSCOPIC DETECTION OF TRACER ELEMENTS IN SOLID PROPELLANT ROCKET EXHAUSTS
THIOKOL CHEMICAL CORP DENVILLE N J REACTION MOTORS DIV
The feasibility of a spectroscopic method for detection of tracer elements in the exhaust flames of solid propellant rocket engines was investigated. This technique has the possibility of being used to determine burning rates and characteristics of solid propellant grains in operating motors. This is done by relating time of appearance of specific emitted radiation in the exhaust flame with the original position of corresponding tracer salts previously incorporated within the grain. Spectrograph modification and protective measures were required for field monitoring of tracer emission in rocket exhausts of engines operating in an outdoor test installation. Suitable tracers were incorporated into solid propellant grains of two compositions--one aluminized to obtain high flame temperatures and background continuum radiation, the other without aluminum to provide lower temperatures and no background. Feasibility of the method was demonstrated with the detection of tracer emission from the aluminized propellant against the background radiation. Author
DA11 022 508ORD2422