Characterization of Titanium Laser Ablation

22nd International Conference on Spectral Line Shapes

Woods, A.C.^1 ; Parigger, C.G.^1

University of Tennessee, Space Institute, 411 B. H. Goethert Pkwy, Tullahoma

TN

37388, United States^1

关键词: Ablation plumes;    Boltzmann plot;    Emission lines;    Ionic emission lines;    Laserinduced breakdown spectroscopy (LIBS);    Pulsed Nd:YAG laser;    Sample surface;    Two dimensional images;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/548/1/012053/pdf
DOI  :  10.1088/1742-6596/548/1/012053

来源: IOP

【 摘 要 】

The atomic and ionic emission lines of titanium are often studied in laser-induced breakdown spectroscopy (LIBS) investigations, partly due to the abundance and luminosity of the lines and titanium's prominence in industry. In the current study, a 13 ns pulsed Nd:YAG laser with 160 mJ per pulse ablates a titanium sample in laboratory air at 10 Hz. Ti III emission lines between 232 nm and 244 nm are observed at 200 ns after laser-surface interaction, utilizing a 6 ns window. Two-dimensional images are obtained, providing spectra emanating along the height of the ablation plume. A Boltzmann plot method is implemented in order to infer electron temperature as a function of height along the plume. The hottest region of the plasma tends to be further away from the sample surface and is on the order of 16000 K.