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Digitale Medien

Spectroscopic measurements of laser induced plasma during welding with CO2 laser (1994)

Szymanski, Z. ; Kurzyna, J.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 76 (1994), S. 7750-7756

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Results of spectroscopic measurements of laser-induced plasma under welding conditions are presented. Welding was performed with the use of a continuous-wave CO2 laser operating at a power of 2 kW. Argon or helium was used as a shielding gas. The welding metal was stainless steel or titanium. Emission spectra from plasma were measured with a spectrograph and 1254 Silicon Intensified Target detector connected to the optical multichannel analyzer. The plasma electron temperatures were determined from the relative intensities of spectral lines and the electron densities were determined either from Stark broadening of atomic line or the absolute intensity of ionic line. The distributions of the electron temperature and density over the metal surface are presented and the influence of a shielding gas on plasma parameters is demonstrated. The plasma parameters obtained were used to calculate the absorption of a laser beam in the plasma over the metal surface. No significant absorption was found in our experimental conditions. © 1994 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.357952

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Digitale Medien

Nonstationary laser-sustained plasma (1991)

Szymanski, Z. ; Filipkowski, S.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 69 (1991), S. 3480-3484

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Decay and recovery of laser-sustained argon plasma have been studied both experimentally and theoretically. Temperature distributions at various phases of the discharge were determined experimentally from the continuum emission coefficient. A quasi-two-dimensional cylindrical model has been employed to describe the observed plasma evolution. It was found that the model well described plasma evolution that was observed in the experiment.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.348488

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