In some cases, it is desirable to image and measure fast temperature rises in shock-loaded materials. For this purpose, ASL developed and evaluated different types of two-color thermometry sensors, including molecular crystals and dyes. Using a custom-built thermometric imaging system, ASL mapped the temperature profile of heterogenous samples containing temperature sensors after they were heated using a pulsed laser.
Also, sensors dispersed in polymers were characterized during dynamic compression experiments at WSU’s Institute for Shock Physics. The images below show a streak camera trace of the emission intensity of the sample when subjected to a 6 GPa shot, as well as the integrated intensity and intensity ratio as a function of time.
References:
1. Benjamin R. Anderson, Ray Gunawidjaja, Natalie Gese, and Hergen Eilers, “Two-color thermometric imaging of heterogeneous materials during pulsed laser heating,” Appl. Phys. B-Lasers and Opt. 126 (10), 158 (2020). m https://doi.org/10.1007/s00340-020- 07507-3
2. Benjamin R. Anderson, Ray Gunawidjaja, and Hergen Eilers, “Dy 3+- doped Yttrium Complex Molecular Crystals for Two-color Thermometry in Heterogeneous Materials,” J. Lumin., 188, 238 (2017), doi.org/10.1016/j.jlumin.2017.04.020
