Enhancement of LIBS plasma and efficient collection of emitted light by open smooth triangular cavities

Abstract

Laser-induced breakdown spectroscopy (LIBS) has the disadvantages of weak signal, unreliability, and low sensitivity. Spatial confinement can enhance spectra to improve these shortcomings. The current related researches are based on...

Spectral stability improvement in laser-induced breakdown spectroscopy based on an image auxiliary data preprocessing method

“…12 However, because of uncertain inuencing factors such as the matrix effect, self-absorption effect and experimental environment, the small, inhomogeneous, and drastically evolving plasma produced by the process of laser-material interaction would cause large uctuations in plasma properties (such as plasma temperature and electron density) and relatively poor signal stability of LIBS, which is also regarded as one of the key bottlenecks in achieving improved quantitative performance and wide commercialization of LIBS. [13][14][15] Although various methods, such as machine learning algorithm correction, 16 dual pulse excitation, 17 nano-enhanced, 18 and spatial connement, 19 have been proposed to improve the spectral stability and analytical performance of LIBS, it still cannot avoid the generation of ineffective spectra. Therefore, it is necessary to reduce or eliminate the inuence of ineffective spectral data on quantitative analysis by data preprocessing methods.…”