Enhancement of laser-induced breakdown spectroscopy signals using both a hemispherical cavity and a magnetic field

L. B. Guo, X. N. He, B. Y. Zhang, C. M. Li, W. Hu, Y. S. Zhou, W. Xiong, X. Y. Zeng, Y. F. Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A pair of permanent magnets and an aluminum hemispherical cavity (diameter: 11.1 mm) were both used to confine plasmas produced by chromium targets in air using a KrF excimer laser in laser-induced breakdown spectroscopy. A significant enhancement factor of about 24 in the emission intensity of Cr lines was acquired at a laser fluence of 6.2 J/cm 2 using the hybrid confinement. In comparison, an enhancement factor of only about 12 was obtained with just a cavity. The Si plasmas, however, were not influenced by the presence of magnets as Si is hard to ionize and, hence, has less free electrons and positive ions. The hybrid confinement mechanism is discussed using shock wave theory in the presence of a magnetic field.

Original languageEnglish (US)
Title of host publicationLaser-Based Micro- and Nanopackaging and Assembly VI
DOIs
StatePublished - 2012
EventLaser-Based Micro- and Nanopackaging and Assembly VI - San Francisco, CA, United States
Duration: Jan 24 2012Jan 26 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8244
ISSN (Print)0277-786X

Conference

ConferenceLaser-Based Micro- and Nanopackaging and Assembly VI
CountryUnited States
CitySan Francisco, CA
Period1/24/121/26/12

Keywords

  • Hemispherical cavity
  • Laser-induced breakdown spectroscopy
  • Magnetic field
  • Optical emission spectra

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Guo, L. B., He, X. N., Zhang, B. Y., Li, C. M., Hu, W., Zhou, Y. S., Xiong, W., Zeng, X. Y., & Lu, Y. F. (2012). Enhancement of laser-induced breakdown spectroscopy signals using both a hemispherical cavity and a magnetic field. In Laser-Based Micro- and Nanopackaging and Assembly VI [82440I] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8244). https://doi.org/10.1117/12.910563