In July, the Avantes engineering team got in the Independence Day spirit and measured and profiled the light emitted from common fireworks over a time series to identify the chemical composition as well as profile spectral behavior. The team was successfully able to measure some key elements, including but not limited to Iron, Copper, and Hydrogen. They also noted re-occurring shifts in the spectra with a pattern hinting at layers within the fireworks. The team used Plasus Specline to assist with atomic line identification
- Bring the sample site (table on wheels) outside and in a shaded area
- Mount the collection optics and sample in secure & unmoving holders
- Light one of the firework samples to adjust the integration time of the spectrometer
- Take a dark spectrum to be subtracted from the spectrum. This was meant to remove the influence of the sun on the measurements.
- Set the spectrometer to “burst” mode where 50 (or any desired number) of spectra is collected consecutively. This allowed for temporal characterization of observed firework.
- As soon as the firework as lit, start the “burst” mode measurements until the sample finished.
- Spectrometer: AVASPEC-ULS2048CL-RS-EVO, 1703374U1, RS-25um slit, UA Grating (300 lines/mm), 200-1100nm, OSC-UA, DCL-UV/VIS-200
- Collimating lens: CC-UV/VIS – Cosine Corrector
- Fiber Optics: FC-UVIR400-2-BX - Broadband optical fiber
- Specline Analytics Software
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