Comparison in spatially-resolved emission image excited from low-pressure laser-induced plasmas using helium, argon, krypton

Chizuru Kitaoka, Kazuaki Wagatsuma

Research output: Contribution to journalArticlepeer-review

Abstract

The spatial distribution of the emission intensities of both copper (sample) and plasma gases from a laser-induced plasma was investigated by using a two-dimensionally imaging spectrometer system, when krypton, argon, or helium was employed under various pressure conditions. The shape and the intensities of the emission zone were strongly dependent on the kind and the pressure of the plasma gas. The emission zones of these plasma gases were generally concentrated near the sample surface, whereas those of the copper sample were more expanded towards the surrounding gas. The emission intensity of the copper line became enhanced at larger gas pressures of argon or krypton, while that was much less intense in the helium plasma. These effects could be explained by the difference in the cross-section of collisional excitation between krypton, argon and helium.

Original languageEnglish
Pages (from-to)5-9
Number of pages5
JournalYejin Fenxi/Metallurgical Analysis
Volume29
Issue number3
Publication statusPublished - 2009 Mar 1

Keywords

  • Argon
  • Copper
  • Helium
  • Krypton
  • Laser-induced plasma
  • Optical emission spectrometry
  • Spatial distribution
  • Two-dimensional image

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry

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