Abstract

Hot spots are formed when energetic microstructures are shocked, and they play a critical role in shock sensitivity. It is important to know both the time-dependent size and temperature of the hot spots, in order to generate a kinetic model to describe reaction growth in plastic-bonded explosives (PBX). Here we use a recently developed technique where PBX is fabricated in the form of a thin wafer, embedded within a transparent polymer binder, and shocked with a laser-launched flyer plate that produces pressures of about 30 GPa range. In this method, every crystal of the cyclotetramethylene-tetranitramine (HMX)-based PBX can be observed during the shock. Hot spots can be seen via their thermal emission, which is detected with both a 32-channel optical pyrometer, which gives spatial-average temperatures and emissivities, and an eight-frame nanosecond camera that images hot spots directly with 2 um resolution. Using hyperspectral imaging, we acquire four pairs of time-resolved images using red and blue filters. With simultaneous two-color imaging we can watch temperature and emissivity change with time.

Department(s)

Mechanical and Aerospace Engineering

Publication Status

Free Access

Comments

Air Force Office of Scientific Research, Grant FA9550-19-1-0027.

Recommended Citation: Sellan, D., Valluri, S. K., & Dlott, D. D. (2024). Hyperspectral Imaging for Temperature Measurements of Hot Spots in Shocked Plastic‑Bonded Explosives. AIP Conference Proceedings, 3066(1), 490020. https://doi.org/10.1063/12.0032375

International Standard Serial Number (ISSN)

1551-7616; 0094-243X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

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© 2026 AIP Publishing, All rights reserved.

Creative Commons Licensing

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Publication Date

09 Dec 2024

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