Surface Thermometry of Energetic Materials by Laser-Induced Fluorescence.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1988
- Accession Number
- ADA198094
Entities
People
- Larry P. Goss
- Michael E. Post