We propose the Phase II development of a Laser Absorption Imaging (LAI) diagnostic system, with a design that is specifically optimized for NASA arc jet facilities. This approach exploits advances in high-speed infrared cameras and rapidly tunable lasers to image a range of species in the mid-wave infrared spectral range. The spectral / spatial / temporal data provides needed empirical information. In Phase I, a breadboard system was assembled, and proof of concept measurements conducted to demonstrate temporally and spatially resolved gas property measurements for NO and CO. Specific techniques and components were down selected and risk mitigation strategies developed. In Phase II of the project, we will design and produce a multi-species prototype that will be fully developed and demonstrated at NASA arc jet facilities. Potential NASA Applications (Limit 1500 characters, approximately 150 words): The sensor resulting from this project will be used at NASA arc jet facilities, which support NASA Entry and Descent (ED)/ Entry, Descent and Landing (EDL) missions, such as crewed Moon or Mars return missions, high mass Mars landers, and Venus and gas/ice giant probes. Preparing for such missions will require testing and qualification of Thermal Protection Systems (TPS). Arc jet facilities provide the only ground-based simulation of flight entry conditions and are critical to TPS development required for these and other Exploration missions. Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words): Sensors will provide an attractive alternative to existing gas diagnostics for a range of applications. The ability to obtain high-speed, spatially resolved species concentrations and temperature information will be useful for combustion diagnostics, environmental monitoring and industrial processes. Products could be used for rocket engines, burner performance, and monitoring of pollutants. Duration: 24
