Spectroscopy of laser-induced carbon plasma with nanosecond time resolution

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Emission spectra in the visible spectral range generated by a Nd:YAG laser shining on graphite targets were taken with time-averaging and time resolution. The analyses of the components and temperature of the plasma components were performed in helium environment using the LIBS (Laser Induced Breakdown Spectroscopy) technique. The vibration-rotation temperature of the C2 radical in the plasma initiates around 8000 K and drops exponentially with time. The rate coefficient of the exponential emission decay is 0.0018 ns-1. Thus, the expected lifetime of the C2 Swan emission under our experimental conditions is 555 ns. In addition to C2, singly and doubly ionized carbon, and in the first phase of the plasma, a continuum electron radiation was also observed.

Original languageEnglish
Pages (from-to)61-66
Number of pages6
JournalPeriodica Polytechnica Chemical Engineering
Volume53
Issue number2
DOIs
Publication statusPublished - Jan 1 2009

Keywords

  • Carbon plasma
  • Graphite
  • LIBS
  • Nanosecond time resolution
  • Nd:YAG laser
  • Plasma plume
  • Radical
  • Swan bands
  • Vibration-rotation temperature

ASJC Scopus subject areas

  • Chemical Engineering(all)

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