High enhancement factor in low-power unipolar discharge arc assisted laser induced plasma spectroscopy

Sensitivity improvement of laser-induced breakdown spectroscopy to detect heavy metals in water by Tesla coil discharge

“…The discharge arc pre-ionizes the sample surface before the pulsed laser reaches the sample surface, and intensies the lattice vibration, thereby reducing the laser excitation threshold. 37 In addition, the TCD can cause an increase in the sample temperature, reduce the reectivity of the sample surface, 38 increase the coupling efficiency between the sample and the pulsed laser, and increase the ablation mass of the sample, resulting in an enhancement in spectral intensity. 38,39 3.2 Effect of discharge length molecular bands have the same trend as Al(I) 396.1 nm and AlO (0-0).…”

High-accuracy measurement of the heat of detonation with good robustness by laser-induced breakdown spectroscopy of energetic materials

“…(1) Spectra standardization Firstly, the spectra baseline can be well-tted and subtracted with a simple window-shiing method, which segments and ts the spectrum by the cubic spline interpolation, as described in our previous works. 37,38 Subsequently, the normalized spectral intensity is obtained by the ratio of the baseline corrected spectra to the area under baseline in the corresponding channel.…”

Interpretable-machine-learning-guided discovery of dominant intrinsic factors of sensitivity of high explosives

“…Nowadays, laser-induced micro-explosion technology 14,15 including laser-induced plasma spectroscopy (LIPS) [16][17][18][19] and laser-induced air shock from energetic materials (LASEM) 20 has been considered as a promising high-throughput microscale experimental method for detonation study because the conditions in the a School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China b Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, and School of laser-induced plasma are very similar to those in the chemical reaction zone behind the detonation wave of a detonating bulk explosive. 21 The past few years have witnessed the unprecedented rapid development of fast performance prediction and chemical reaction analysis by the interaction of nanosecond pulsed laser interaction with small dose energetic materials on the microgram to milligram scale.…”