scholarly journals Electron temperature and electron number density measurements in laser ablation Z-pinch experiments

2018 ◽  
Author(s):  
Eric Dutra ◽  
Radu Presura
Keyword(s):  
Laser Ablation ◽  
Electron Temperature ◽  
Electron Number Density ◽  
Number Density ◽  
Electron Number ◽  
Density Measurements ◽  
Z Pinch

Electron temperature and electron number density measurements in laser ablation Z-pinch experiments of Al2O3

2019 ◽  
Vol 26 (8) ◽  
pp. 083506
Author(s):  
E. C. Dutra ◽  
J. A. Koch ◽  
R. Presura ◽  
P. Wiewior ◽  
A. M. Covington
Keyword(s):  
Laser Ablation ◽  
Electron Temperature ◽  
Electron Number Density ◽  
Number Density ◽  
Electron Number ◽  
Density Measurements ◽  
Z Pinch

scholarly journals Influence of the Distance between Focusing Lens and Target Surface on the Characteristics of Laser-excited Lead Plasma

2021 ◽  
pp. 4694-4701
Author(s):  
Qusay Adnan Abbas
Keyword(s):  
Electron Temperature ◽  
Pulse Laser ◽  
Electron Number Density ◽  
Laser Energy ◽  
Pulse Length ◽  
Target Surface ◽  
Spectral Lines ◽  
Stark Broadening ◽  
Number Density ◽  
Electron Number

      The present work investigated the effect of distance from target surface on the parameters of lead plasma excited by 1064nm Q-switched Nd:YAG laser. The excitation was conducted in air, at atmospheric pressure, with pulse length of 5 ns, and at different pulse laser energies. Electron temperature was calculated by Boltzmann plot method based on the PbI emission spectral lines (369.03 nm, 416.98 nm, 523.48, and 561.94 nm). The PbI lines were recorded at different distances from the target surface at laser pulse energies of 260 and 280 mJ. The emission intensity of plasma increased with increasing the lens-to-target distance. The results also detected an increase in electron temperature with increasing the distance between the focal lens and the surface of the target in all laser energies under study. In addition, the electron number density was determined by using the Stark broadening method. The data illustrated that the electron number density was increased with increasing the distance from target surface, reaching the maximum at a distance of 11 cm for all pulse laser energy levels under study.

scholarly journals Spectroscopic Characterization of Laser Ablated Germanium Plasma

2021 ◽  
Vol 22 (2) ◽  
pp. 396-403
Author(s):  
Muhammad Ashraf ◽  
Nek Muhammad Shaikh ◽  
Tasneem Zehra ◽  
Ghulam Abbas Kandhro ◽  
Ghulam Murtaza
Keyword(s):  
Electron Temperature ◽  
Electron Number Density ◽  
Plasma Plume ◽  
Research Work ◽  
Spectroscopic Characterization ◽  
Laser Irradiance ◽  
Number Density ◽  
Electron Number ◽  
Boltzmann Plot ◽  
Detector Position

In the present study, the germanium (Ge) sample has been studied by laser induced breakdown spectroscopy which leads to the formation of plasma plume in the air. This research work comprises on pure Ge sample, and it has been studied using laser irradiance 1.831011 watt.cm-2 and Q-Switched Nd:YAG laser pulse (λ ~ 1064 nm wavelength and  ~ 5 ns pulse width). The spatially resolved plasma plume parameters are investigated, such as variation of electron temperature Te and electron number density ne as a function of detector position. These parameters show variation in the plasma plume and yield electron temperature Te from 12340 to 7640 ± 1200 K. Whereas electron number density ne varies from 3.61017 to 1.601017 cm-3 with the change in detector position is moving away from plasma plume from 0 to 3 mm. The results show that electron temperature Te and electron number density ne are estimated from the Boltzmann plot method and by using Lorentzian function at spectral line using FWHM full width at half maximum at 265.11 nm (4p5s 3 p2 → 4p 2 3 p2) wavelength of Ge (I) line, respectively.

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