Investigation of potential laser-induced heating effects when using thermographic phosphors for gas-phase thermometry

J. Lindén*, N. Takada, Bengt Johansson, M. Richter, M. Aldén

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The spectral emission from thermographic phosphors in free flow and its dependence of laser energy per cross section area (laser fluence [J/cm 2]) has been investigated. Temperature measurements in gaseous flows using thermographic phosphors require higher laser energy than measurements performed on surfaces, due to lower particle density. A troublesome systematic error associated with high fluences would be introduced if the excitation laser heats the particles. In the presented work, three different types of the thermographic phosphor BaMg2Al10O17:Eu (BAM) are investigated. Spectra of the phosphorescence are achieved for a range of laser fluences. The results show no indications of the laser heating the particles, making further development of phosphor thermography in free-flow applications feasible.

Original languageEnglish (US)
Pages (from-to)237-240
Number of pages4
JournalApplied Physics B: Lasers and Optics
Volume96
Issue number2-3
DOIs
StatePublished - Aug 1 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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