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Type: Journal article
Title: Laser diagnostics of welding plasma by polarization spectroscopy
Author: Lucas, O.
Alwahabi, Z.
Linton, V.
Meeuwissen, K.
Citation: Applied Spectroscopy, 2007; 61(5):565-569
Publisher: Soc Applied Spectroscopy
Issue Date: 2007
ISSN: 0003-7028
Statement of
Owen Lucas, Zeyad T. Alwahabi, Valerie Linton, and Karel Meeuwissen
Abstract: The application of polarization spectroscopy (PS) to detect atomic species in an atmospheric pressure welding plasma has been demonstrated. PS spectra of Na atoms, seeded in the shielding gas flow of a gas tungsten arc welding (GTAW) plasma, are presented at different pump beam energies. The nature of the PS technique was found to be very efficient in suppressing the high background emission associated with the welding plasma. The PS spectral profiles appear to be Lorentzian and Lorentzian cubed for high and low pump beam energy, respectively. The effect of beam steering, due to the thermal gradient in the interaction plasma zone, was addressed. It was found that there is 2% unavoidable error in the detectable PS signal.
Keywords: Gases
Spectrum Analysis
Materials Testing
Hot Temperature
DOI: 10.1366/000370207780807740
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Appears in Collections:Aurora harvest
Mechanical Engineering publications

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