MHz-Rate Burst-Mode Spectroscopy and Imaging of Temperature and Species in Post-Detonation Fireballs
Abstract
The proposed research effort will enable dynamic characterization of post-detonation fireballs involving novel agent defeat additives and agent simulants using burst-mode laser spectroscopy and imaging under optically thick conditions. This approach will enable new measurement capabilities through ultrahigh repetition rates (100 kHz to MHz), variable pulse durations (picosecond to nanosecond), significantly higher per pulse energies (25 mJ/pulse at 1 MHz), and broad wavelength conversion (ultraviolet to mid-infrared). The flexibility of burst-mode diagnostics will be used to extend pulsed optical diagnostic approaches for speciation and thermometry in the challenging environment of post-detonation fireballs, including broadband laser absorption, two-line thermometry, and laser-induced fluorescence. We propose to explore new methods of accessing key combustion species for tracking the spatio-temporal evolution of C-WMD weapon additives and their interaction with agent simulants over a range of optical depths up to six logs. This is a multidisciplinary proposal including faculty with expertise in mechanical engineering, aeronautics and astronautics, chemistry, material science, and laser physics.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 10, 2017
- Source ID
- HDTRA11710031
Entities
People
- Terrence R Meyer
Organizations
- Defense Threat Reduction Agency
- University of Virginia