Insights into Enhanced Repeatability of Femtosecond Laser-Induced Plasmas
Sahar Sheta, Muhammad Sher Afgan, Jiacen Liu, Weilun Gu, Zongyu Hou, Zhe Wang
Abstract
at 200 ns, and RSDs were <3% with the least fluctuation of 0.7%. Shot-to-shot RSDs were 3.5-5% at 15-30 drilling shot intervals for line intensities, <2% for plasma temperature, and <6.5% for electron density. Using an uncertainty propagation formula, total number density RSDs were calculated to be 1.9-5.3% for 50 single-shot drilling scenarios. Considering physics behind results, fs-plasmas are "stable ablation sources" due to their electrostatic formation mechanisms and confined hydrodynamic evolution. The fs-laser opens up new directions for LIBS applications where accuracy is significantly enhanced.
Topics & Concepts
RepeatabilityFemtosecondLaser-induced breakdown spectroscopyPlasmaMaterials scienceLaserAnalytical Chemistry (journal)SpectroscopyElectron densityAtomic physicsOpticsChemistryPhysicsChromatographyQuantum mechanicsLaser-induced spectroscopy and plasmaCultural Heritage Materials AnalysisAnalytical chemistry methods development