Spectroscopic Diagnostics of Plasma parameter in Laser Induced Plasma using PbO Lines

Abstract

The optical emission spectrum of produced plasma was studied using pulse laser, where the effect of laser energy at a wavelength of 1064nm was studied on lead oxide that produced by optical emission spectroscopy at different laser energy from 500 to 900 mJ. It was found that the intensity for Pb I and Pb II lines increase with increasing laser energy, but with different ratio, as a result increasing the excitation rate with increasing the number of falling photons. The wave length was recorded at highest laser Energy produced from Pb II which was equal to 666.02 nm. It can be seen that The height of peaks increase with increasing laser energy due to the effect of increasing the Electrical field induced by increasing Electrons density and the temperature of electron (Te) and electron density (ne) increase from 1.222×1018 cm-3 to 1.444×1018 cm-3 with increasing laser energy from 500 to 900 mJ respectively as a result of increasing number of falling photons which lead to increase in the electron density.
 
 http://dx.doi.org/10.25130/tjps.24.2019.033 

Characterization of Atmospheric Electrical Discharge in Pin-water Configuration at Different NaCl Concentrations

“…The essential plasma metrics used to determine the plasma state is (T e ). The electron temperature was determined in this work using the Boltzmann plot method (equation 1) and the data listed in table (1). Figure (6) display the boltzmann plots using the selected ionic nitrogen lines (N II) for the air plasma between the pin electrode and water surface at three different NaCl concentrations.…”

“…In plasma physics science and technology, the study of plasma-liquid interactions is becoming of increasing importance. 'Experiments on Air', a famous work by Cavendish from 1785, may be the earliest account of plasma-liquid contacts and the nitric acid production by an electric spark in the atmosphere [1][2][3]. Plasma-liquid interactions lead to complicated physical and chemical processes, ranging from multiphase species transport in the gas phase to mass and heat transfer in the liquid phase to interfacial reactions and extremely complex liquid phase chemistry.…”

“…Figure(1) the single pin to liquid discharge device that was employed in this experiment is displayed. (which is, highly efficient, simple, easy to operate, and low cost).…”