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 language | English |
---|---|
Pages (from-to) | 237-240 |
Journal | Applied Physics B |
Volume | 96 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 2009 |
Subject classification (UKÄ)
- Atom and Molecular Physics and Optics