Computation of blast wave energy in LIBS using Shadowgraphy

abstract

en

Shadowgraphy is an optical method, that can be used to observe non-uniformities in transparent media, such as air or water. In connection with Laser-Induced Breakdown Spectroscopy (LIBS) we can see blast wave, that was created by ablation of a sample. This method in LIBS can be used for observation of different ablation and expansion mechanism using ns, fs or ps laser pulse (Zeng, X., Appl.Phys. A Mater, vol. 80, 2005), impact of the wavelength of the ablation laser (Boueri, M., Appl. Surf. Sci, vol. 255, 2009) or its energy fluence (Rezaei, F., J. Anal. At. Scetrom., vol. 29, 2014). It is also possible to use Shadowgraphy to see impact on the behaviour of the blast wave expansion in different ambient gas at certain pressure (Skrodzki, P. J., Specrochim. Acta part B, vol. 125, 2016), or even for underwater ablation (Sakka, T., Specrochim. Acta part B, vol. 64, 2016). Several models were created for the blast wave expansion, that can predict its distance from the samples surface, or even initial energy of the blast wave. Examples of these models are Drag, Sedov-Taylor and Jones model (Harilal, S. S., J. Appl. Phys., vol. 95, 2003). In our research we focused on using Sedov-Taylor and Jones model in order to calculate initial energy of the blast wave. This way we can approximately determine amount of energy used for ablation of the materials.

Shadowgraphy is an optical method, that can be used to observe non-uniformities in transparent media, such as air or water. In connection with Laser-Induced Breakdown Spectroscopy (LIBS) we can see blast wave, that was created by ablation of a sample. This method in LIBS can be used for observation of different ablation and expansion mechanism using ns, fs or ps laser pulse (Zeng, X., Appl.Phys. A Mater, vol. 80, 2005), impact of the wavelength of the ablation laser (Boueri, M., Appl. Surf. Sci, vol. 255, 2009) or its energy fluence (Rezaei, F., J. Anal. At. Scetrom., vol. 29, 2014). It is also possible to use Shadowgraphy to see impact on the behaviour of the blast wave expansion in different ambient gas at certain pressure (Skrodzki, P. J., Specrochim. Acta part B, vol. 125, 2016), or even for underwater ablation (Sakka, T., Specrochim. Acta part B, vol. 64, 2016). Several models were created for the blast wave expansion, that can predict its distance from the samples surface, or even initial energy of the blast wave. Examples of these models are Drag, Sedov-Taylor and Jones model (Harilal, S. S., J. Appl. Phys., vol. 95, 2003). In our research we focused on using Sedov-Taylor and Jones model in order to calculate initial energy of the blast wave. This way we can approximately determine amount of energy used for ablation of the materials.

LIBS, Shadowgraphy, LIP

02.12.2020

Szeged, Hungary

978-963-306-765-9

INTERNATIONAL WORKSHOP ON LASER-INDUCED BREAKDOWN SPECTROSCOPY

90–93

171