scholarly journals Influence of Gas Type on the Laser Produced Graphite Plasma

2021 ◽  
Vol 2114 (1) ◽  
pp. 012030
Author(s):  
H Adil A Alazawi ◽  
Q Adnan Abass
Keyword(s):  
Electron Temperature ◽  
Electron Density ◽  
Plasma Frequency ◽  
Laser Energy ◽  
Debye Length ◽  
Optical Emission ◽  
Plasma Parameters ◽  
Pulse Laser Energy ◽  
Electron Density Increase ◽  
Ionic Emission

Abstract Plasma graphite creation by a pulsed Nd: YAG laser with a wavelength of 1064nm to a target in vacuum in two cases (Argon, Air) with varied gas pressures and the resulting spectrum was diagnosed using optical emission spectroscopy for the wavelength range 320-740nm electron temperature Te and electron density ne Debye lengthλD , and plasma frequency f p were calculated. The results showed that increasing the pulse laser energy causes all plasma parameters of both gases under study to increase, as well as a rise in the emission line intensity. The ionization energy of target atoms determines the presence of an element’s atomic and ionic emission lines in the emission spectrum, increase in pressure decreases the electron temperature, and Debye length, also plasma frequency and electron density increase, as it has been proven that the type of gas does not affect the properties of plasma.

scholarly journals A Study of the Spectroscopic Performance of Laser Produced CdTe(x):S(1-x) Plasma

2019 ◽  
Vol 17 (42) ◽  
pp. 96-102
Author(s):  
Kadhim Abdulwahid Aadim
Keyword(s):  
Optical Properties ◽  
Electron Temperature ◽  
Electron Density ◽  
Optical Transmission ◽  
Plasma Frequency ◽  
Debye Length ◽  
Transmission Method ◽  
Plasma Parameters

Abstract In this work, the plasma parameters (electron temperature (Te), electron density( ne), plasma frequency (fp) and Debye length (λD)) have been studied by using the spectrometer that collect the spectrum of Laser produce CdTe(X):S(1-X) plasma at X=0.5 with different energies. The results of electron temperature for CdTe range 0.758-0.768 eV also the electron density 3.648 1018 – 4.560 1018 cm-3  have been measured under vacuum reaching 2.5 10-2 mbar .Optical properties of CdTe:S were determined through the optical transmission method using ultraviolet visible spectrophotometer within the range 190 – 1100 nm.

scholarly journals Spectroscopic Diagnostic of Cadmium Sulfide Plasma Produced By LIBS

2019 ◽  
Vol 17 (42) ◽  
pp. 103-107
Author(s):  
Ala' Fadhil Ahmed
Keyword(s):  
Electron Temperature ◽  
Cadmium Sulfide ◽  
Electron Density ◽  
Plasma Frequency ◽  
Debye Length ◽  
Emission Lines ◽  
Spectral Emission ◽  
Plasma Parameters ◽  
Temperature Electron

Abstract        The current study was carried out to reveal the plasma parameters such as ,the electron temperature ( ), electron density (ne) , plasma frequency (fp), Debye length ( ) , Debye number (   for  CdS to employ the LIBS for the purpose of analyzing and determining spectral emission lines using . The results of electron temperature for CdS range (0.746-0.856) eV , the electron density(3.909-4.691)×1018 cm-3. Finally ,we discuss plasma parameters of CdS  through  nano second  laser generated plasma .

scholarly journals Spectroscopic study the plasma parameters for SnO2 doped ZnO prepared by pulse Nd:YAG laser deposition

2019 ◽  
Vol 17 (42) ◽  
pp. 125-135
Author(s):  
Kadhim Abdulwahid Aadim
Keyword(s):  
Electron Temperature ◽  
Electron Density ◽  
Tin Oxide ◽  
Peak Power ◽  
Plasma Frequency ◽  
Debye Length ◽  
Laser Deposition ◽  
Plasma Parameters ◽  
Analysis Techniques ◽  
Doped Zno

 In this work, plasma parameters such as (electron temperature (Te), electron density (ne), plasma frequency (fp) and Debye length (λD)) were studied using spectral analysis techniques. The spectrum of the plasma was recorded with different energy values, SnO2 and ZnO anesthetized at a different ratio (X = 0.2, 0.4 and 0.6) were recorded. Spectral study of this mixing in the air. The results showed electron density and electron temperature increase in zinc oxide: tin oxide alloy targets. It was located  that  The intensity of the lines increases in different laser peak powers when the laser peak power increases and then decreases when the force continues to increase.

scholarly journals Spectroscopic study the plasma parameters for Pb doped CuO prepared by pulse Nd:YAG laser deposition

2018 ◽  
Vol 16 (38) ◽  
pp. 1-9
Author(s):  
Kadhim A Aadim
Keyword(s):  
Spectroscopic Study ◽  
Electron Temperature ◽  
Optical Transmission ◽  
Optical Emission Spectroscopy ◽  
Plasma Frequency ◽  
Debye Length ◽  
Optical Emission ◽  
Spectroscopy Technique ◽  
Transmission Method ◽  
Plasma Parameters

In this work, plasma parameters such as, the electron temperature )Te(, electron density ne, plasma frequency )fp(, Debye length )λD(and Debye number )ND), have been studied using optical emission spectroscopy technique. The spectrum of plasma with different values of energy, Pb doped CuO at different percentage (X=0.6, 0.7, 0.8) were recorded. The spectroscopic study for these mixing under vacuum with pressure down to P=2.5×10-2 mbar. The results of electron temperature for X=0.6 range (1.072-1.166) eV, for X=0.7 the Te range (1.024-0.855) eV and X=0.8 the Te is (1.033-0.921) eV. Optical properties of CuO:Pb thin films were determined through the optical transmission method using ultraviolet visible spectrophotometer within the range (190 – 1100) nm.

scholarly journals Machine Learning Prediction of Electron Density and Temperature from Optical Emission Spectroscopy in Nitrogen Plasma

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1221
Author(s):  
Jun-Hyoung Park ◽  
Ji-Ho Cho ◽  
Jung-Sik Yoon ◽  
Jung-Ho Song
Keyword(s):  
Machine Learning ◽  
Electron Temperature ◽  
Real Time ◽  
Electron Density ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Plasma Parameters ◽  
Plasma Nitridation

We present a non-invasive approach for monitoring plasma parameters such as the electron temperature and density inside a radio-frequency (RF) plasma nitridation device using optical emission spectroscopy (OES) in conjunction with multivariate data analysis. Instead of relying on a theoretical model of the plasma emission to extract plasma parameters from the OES, an empirical correlation was established on the basis of simultaneous OES and other diagnostics. Additionally, we developed a machine learning (ML)-based virtual metrology model for real-time Te and ne monitoring in plasma nitridation processes using an in situ OES sensor. The results showed that the prediction accuracy of electron density was 97% and that of electron temperature was 90%. This method is especially useful in plasma processing because it provides in-situ and real-time analysis without disturbing the plasma or interfering with the process.

Laser-Induced Plasma Atomic and Ionic Emission During Target Ablation

2021 ◽  
Author(s):  
Nisreen Kh. Abdalameer ◽  
Sabah N. Mazhir
Keyword(s):  
Nd:Yag Laser ◽  
Plasma Parameter ◽  
Debye Length ◽  
Optical Emission ◽  
Solid Target ◽  
Plasma Parameters ◽  
Laser Induced Plasma ◽  
Repeat Rate ◽  
Ionic Emission ◽  
Debye Formula

This paper investigates the spectroscopy of plasma that resulted from the bombardment of ZnSe by using the optical emission spectroscopic (OES) technique. The plasma can be generated by the reaction between an Nd:YAG laser, with a wavelength of 1064[Formula: see text]nm with a repeat rate of 6[Formula: see text]Hz (as well as 9[Formula: see text]ns pulse duration), and a solid target, where the density of the electron (ne), the temperature of the electron ([Formula: see text]), the frequency of the plasma ([Formula: see text]) and the Debye length ([Formula: see text]) as plasma parameters, in addition to the particles’ number of Debye ([Formula: see text]) and plasma parameter ([Formula: see text]) have been calculated by picking up the spectrum of plasma at different energies (100, 200, 300, 400, 500) mj using Selenium (Se), Zinc (Zn) and the mixture (ZnSe) at ([Formula: see text]). It is found that the electron temperatures of Zn and Se ranged between (0.257–0.267)[Formula: see text]eV and (1.036–1.055) eV, respectively, while that of ZnSe ranged between (1.15–1.28)[Formula: see text]eV. This indicates that the electron temperature of ZnSe is higher than the temperatures of each Zn and Se.

scholarly journals Spectroscopic Analysis of CdO1-X: SnX Plasma Produced by Nd:YAG Laser

2020 ◽  
pp. 1665-1671
Author(s):  
Madyan A. Khalaf ◽  
Baida M. Ahmed ◽  
Kadhim A. Aadim
Keyword(s):  
Electron Temperature ◽  
Spectroscopic Analysis ◽  
Outcome Measure ◽  
Focal Length ◽  
Debye Length ◽  
Optical Emission ◽  
Plasma Parameters ◽  
Optical Emission Spectrum ◽  
Mixing Ratios ◽  
Line Intensities

In this work, the optical emission spectrum technique was used to analyze the spectrum resulting from the CdO:Sn plasma produced by laser Nd:YAG with a wavelength of (1064) nm, duration of (9) ns, and a focal length of (10) cm in the range of energy of 500-800 mJ. The electron temperature (Te) was calculated using the in ratio line intensities method, while the electron density (ne) was calculated using Saha-Boltzmann equation. Also, other plasma parameters were calculated, such as plasma (fp), Debye length (λD) and Debye number (ND). At mixing ratios of X=0.1, 0.3 and 0.5, the CdO1-X :SnX plasma spectrum was recorded for different energies. The changes in electron temperature and the densities were studied as a function of the laser energies. Outcome measure value of the electron temperature at the ratio of  X = 0.1 was (1.079-1.054) eV, while at  X=0.3 the Te range was (0.952- 0.921) eV and at X=0.5 it was (0.928-0.906) eV.

Effect of Current on Plasma Parameters Resulting from the Wires-Exploding Technique of Copper Material

2020 ◽  
pp. 110-113
Keyword(s):  
Electron Temperature ◽  
Electron Density ◽  
Optical Emission ◽  
Plasma Electron ◽  
Stark Broadening ◽  
Number Density ◽  
Hydrogen Atoms ◽  
Plasma Parameters ◽  
Optical Emission Spectrum ◽  
Copper Material

In this research the diagnostic of optical emission spectroscopy from exploding copper wires have done for different current. By using Boltzman plot can be calculated the plasma electron temperature , and by using Stark broadening can be evaluated the electron density for different current of (75, 100 and 150)A with diameter 0.25 mm in deionized water. It was observed that the electron density decrease with an increasing the current from 75 A to 150 A while the electron temperatures increase for the same current. The plasma has a peak 652 nm corresponding to Hα line for .hydrogen .atoms which obtained from .optical emission spectrum (OES), the peaks belong to atomic copper lines. The plasma electron temperature related with emission line intensity and number .density with the formed copper nanoparticles size was studied.

A Study of the Spectroscopic Performance of Laser Produced CdTe Plasma

2018 ◽  
Author(s):  
Kadhim A. Aadim ◽  
Ghaith H. Jihad
Keyword(s):  
Optical Properties ◽  
Electron Temperature ◽  
Cadmium Telluride ◽  
Electron Density ◽  
Optical Transmission ◽  
Plasma Frequency ◽  
Debye Length ◽  
Plasma Electron ◽  
Transmission Method

In this work, the parameters of plasma (electron temperature (Te), electron density ne, plasma frequency (fp) , Debye length (λD) and Debye number (ND)) have been studied by using the spectrometer that collect the spectrum of Laser produce Cadmium telluride plasma at different energies. The results of electron temperature for CdTe range 0.93-1.18 eV also the electron density 5 × 1010 – 3.8 × 1011 cm-3   have been measured under vacuum reaching 2.5 × 10-2 mbar .Optical properties of CdTe were determined through the optical transmission method using ultraviolet visible spectrophotometer within the range 190 – 1100 nm.

scholarly journals Effect of Target properties on the Plasma Characteristics that produced by Laser at Atmospheric Pressure

2019 ◽  
pp. 1251-1258
Author(s):  
Qusay Adnan Abbas
Keyword(s):  
Pulse Laser ◽  
Atmospheric Pressure ◽  
Ionization Energy ◽  
Laser Energy ◽  
Wave Length ◽  
Optical Emission ◽  
Fundamental Wave ◽  
Pulse Laser Energy ◽  
Plasma Characteristics ◽  
Ionic Emission

In this paper, Al and Cu Plasmas that produced by pulsed Nd:YAG laser with fundamental wave length with a pulse duration of 6 nS focused onto Al and Cu targets in atmospheric air are investigated spectroscopically. The influence of pulse laser energy on the some Al and Cu plasmas characteristics was diagnosed by using optical emission spectroscopy for the wavelength range 320-740 nm. The results observed that the increase of pulse laser energy causes to increase all plasma characteristics of both plasmas under study and shown increasing of the emission line intensity. The appearance of the atomic and ionic emission lines of an element in the emission spectrum depends on the ionization energy of target atoms. The plasma characteristics are subjected to the ionization energy of the target element and laser energy.

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