AP0839 Effects of Energy and Wavelength on Laser-Induced Breakdown Spectroscopy of Ablated Tantalum Plasma

Abstract

In this study, the characteristics of plasma such as electron temperature, electron density, plasma frequency, Debye length, and Debye number have been investigated by the laser-induced breakdown spectroscopy (LIBS) of tantalum (Ta) plasma generated by different laser energies. It was observed that the electron temperature of Ta plasma is ranging from 1.26 to 2.29 eV using 532nm laser wavelength and from 0.57 to 2.93 eV using 1064nm laser wavelength. In a similar manner, electron density was observed to be in the range of 1.90×10¹⁸–2.25×10¹⁸ cm^-3 using 532nm and in the range of 0.71×10¹⁸–1.13×10¹⁸ cm^-3 using 1064nm. This study includes the evaluation of optical properties of Ta plasma via UV-visible spectroscopy within the 190–1100nm range. Furthermore, the study explores the crystalline structure and zeta-potential values of 22.55mV using 1064nm and 24.17mV using 532nm, highlighting their roles in understanding material ablation and plasma dynamics under different laser conditions.