Issue 5, 2021

The spatial resolution of nanosecond laser-induced plasma spectroscopy in gases

Abstract

For spectral techniques, one of the most critical parameters is spatial resolution. The spatial resolution of nanosecond laser-induced breakdown spectroscopy (ns LIBS) in gases, however, has not been thoroughly studied, and no clear conclusion has been reached. Here, we measured the one-dimensional spectra of ns LIBS at the boundary of two parallel gas flows, i.e., oxygen and nitrogen, with high temporal and spatial resolution. We found that firstly, the plasma expands rapidly even after the laser pulse, and accordingly, the ions generated during the laser pulse also expand; secondly, as the plasma continues to grow after the laser pulse, it will engulf and ionize the surrounding gases, which also contributes to the LIBS signal. Hence, we believe that strictly speaking, the spatial resolution of ns LIBS in gases is the size of the plasma at the point in time when LIBS is measured.

Graphical abstract: The spatial resolution of nanosecond laser-induced plasma spectroscopy in gases

Article information

Article type
Paper
Submitted
31 Dec 2020
Accepted
17 Mar 2021
First published
07 Apr 2021

J. Anal. At. Spectrom., 2021,36, 993-998

The spatial resolution of nanosecond laser-induced plasma spectroscopy in gases

X. Li, Q. gao, L. Han, M. Li, Z. Zhu and B. Li, J. Anal. At. Spectrom., 2021, 36, 993 DOI: 10.1039/D0JA00534G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements