Journal
OPTIK
Volume 225, Issue -, Pages -Publisher
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2020.165812
Keywords
LIBS; fs laser; Discharge; Plasma temperature; Electron density
Categories
Funding
- National Natural Science Foundation of China [11674128, 11674124, 11974138]
- Scientific and Technological Research Project of the Education Department of Jilin Province, China [JJKH20200937KJ]
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The study used SP to enhance the spectral emission intensity of fs-LIBS and measured the plasma temperature and electron density under different conditions, providing insights into understanding SP-assisted fs-LIBS.
In laser-induced breakdown spectroscopy (LIBS), spark-discharge (SP) is an effective auxiliary method to improve spectral emission intensity, and can effectively affect plasma temperature and electron density. In traditional LIBS technology, nanosecond laser is usually used as excitation source. Compared with nanosecond laser, femtosecond (fs) pulse laser has many advantages in the interaction between laser and matter. The SP can also enhance the emission intensity of fsLIBS. However, the discussion on plasma temperature and electron density of SP assisted fsLIBS is rare. In this study, we measured time-resolved spectra of fs-LIBS with the SP. By using the Boltzmann plot and the Stark broadening, we calculated time-resolved plasma temperatures and electron densities for different laser energies at different discharge voltages. We hope that this study can provide a better understanding for SP assisted fs-LIBS.
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