Accession Number : ADA198094

Title :   Surface Thermometry of Energetic Materials by Laser-Induced Fluorescence.

Descriptive Note : Annual technical rept. 17 Feb 87-17 Feb 88,

Corporate Author : SYSTEMS RESEARCH LABS INC DAYTON OH

Personal Author(s) : Goss, Larry P ; Post, Michael E

PDF Url : ADA198094

Report Date : 01 Apr 1988

Pagination or Media Count : 36

Abstract : The laser-induced fluorescence from Dysprosium:YAG has been employed for the measurement of temperature on reacting and nonreacting surfaces. Point, line, and two-dimensional mapping of the surface temperature has been demonstrated utilizing the tripled output (355 nm) of a Neodymium:YAG laser. The temporal and spatial distribution of the temperature was recorded with a two-dimensional intensified imaging system. The technique has also been utilized for the measurement of the thermal depth profile of a plastic material undergoing rapid heating by a carbon dioxide laser. Work is in progress on all three tasks of this program, with the most significant accomplishment of the first year being the demonstration of the two-dimensional thermal imaging of heated inert surfaces. Thermal depth profiling has been conducted with a linear array, while the development of a fiber-optic thermal probe is in progress. Preliminary efforts on bonding techniques of the Dy:YAG crystals were initiated, with plasma spray holding the most promise for nonmetallics. Future efforts on the project will be directed toward two-dimensional measurements on energetic materials, completion of thermal-probe development and applications, and identification of optimum bonding methods for nonmetallic materials. (AW)

Descriptors :   *LASER INDUCED FLUORESCENCE, *SURFACE TEMPERATURE, NEODYMIUM LASERS, YAG LASERS, IMAGE PROCESSING, TEMPERATURE MEASURING INSTRUMENTS

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE