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 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 study for plasma parameters in co-sputtering system

2019 ◽  
Vol 14 (31) ◽  
pp. 122-128
Author(s):  
Kadhim A. Aadim
Keyword(s):  
Electron Temperature ◽  
Electron Density ◽  
Optical Transmission ◽  
Plasma Electron ◽  
Electron Velocity ◽  
Transmission Method ◽  
Plasma Parameters ◽  
Argon Gas ◽  
P Type ◽  
Sputtering System

In this work the parameters of plasma (electron temperature Te,electron density ne, electron velocity and ion velocity) have beenstudied by using the spectrometer that collect the spectrum ofplasma. Two cathodes were used (Si:Si) P-type and deposited onglass. In this research argon gas has been used at various values ofpressures (0.5, 0.4, 0.3, and 0.2 torr) with constant deposition time4 hrs. The results of electron temperature were (31596.19, 31099.77,26020.14 and 25372.64) kelvin, and electron density (7.60*1016,8.16*1016, 6.82*1016 and 7.11*1016) m-3. Optical properties of Siwere determined through the optical transmission method usingultraviolet visible spectrophotometer with in the range(300 – 1100) nm.

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 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 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 Measurement of plasma electron temperature and density by using different applied voltages and working pressures in a magnetron sputtering system

2018 ◽  
Vol 7 (3) ◽  
pp. 1177 ◽  
Author(s):  
Sabah N. Mazhir ◽  
Mohammed K. Khalaf ◽  
Sarah K. Taha ◽  
Hussein K . Mohsin
Keyword(s):  
Magnetron Sputtering ◽  
Electron Temperature ◽  
Electron Density ◽  
Applied Voltage ◽  
Low Cost ◽  
Plasma Electron ◽  
Spectral Lines ◽  
Glow Discharge Plasma ◽  
Working Pressure ◽  
Sputtering System

This paper discusses applying different voltages and pressure in the presence of silver target and argon gas to produce plasma. Home-made dc magnetron sputtering system was used to produce glow discharge plasma. The distance between two electrodes is 4 cm. Gas used to produce plasma is argon that flows inside the chamber with flow rate 40 sccm. Intensity of spectral lines, electron temperature and electron density were studied. The results show that the intensity of spectral lines increases with the increase of the working pressure and applied voltage. Electron temperature increases by the increase of applied voltage but decreases with the increase of working pressure, while electron density decreases with the increase of applied voltage and increases with the increase of working pressure. This research demonstrates a new low cost approach to start producing high corrosion resistance materials.  

Sheath-Convection Effects with Flush-Mounted Electrostatic Probes

1971 ◽  
Vol 49 (20) ◽  
pp. 2540-2546 ◽  
Author(s):  
R. M. Clements ◽  
P. R. Smy
Keyword(s):  
Electron Density ◽  
Free Stream ◽  
Diffusion Theory ◽  
Debye Length ◽  
Leading Edge ◽  
Plasma Electron ◽  
Electronic Charge ◽  
Order Of Magnitude ◽  
Moving Plasma ◽  
Cooling Effects

Theoretical expressions are derived for the ion current to a planar flush-mounted probe which arises from the convection of ions from a moving plasma into the probe sheath. The two situations considered are those where the sheath is either very large or is small compared with the boundary layer. It is found that sheath effects, with an accompanying lack of true current saturation with increasing probe bias, can be expected to intrude when the parameter REα2χ2 > (X/l)1/4. (RE = electric Reynold's number, α = ratio of Debye length to probe length [X], χ = potential of probe normalized with respect to the electron energy, and l = the distance of the probe from the leading edge of the surface into which it is mounted.) For values of REα2χ2(l/X)2 which exceed unity, the formula[Formula: see text](where ne = plasma electron density, u∞ = free stream flow velocity, V = probe bias, μ∞ = free stream ion mobility, e = electronic charge, and ε0 = permittivity of free space) is derived. At lower values of REα2χ2(l/X)2 theoretical considerations which take compression and cooling effects into account show that the above relation should still be approximately correct down to values of [Formula: see text]. The relation shows good agreement with the recent results presented by Scharfman and Bredfeldt under conditions where they report the conventional diffusion theory to be in error by up to one order of magnitude, and moreover to predict an incorrect variation of current with electron density and probe bias.

scholarly journals Influence of working pressure and lasing energy of Al plasma in laser-induced breakdown spectroscopy

2019 ◽  
Vol 17 (40) ◽  
Author(s):  
Qusay Adnan Abbas
Keyword(s):  
Electron Temperature ◽  
Electron Density ◽  
Laser Power ◽  
Debye Length ◽  
Laser Power Density ◽  
Laser Induced Breakdown Spectroscopy ◽  
Working Pressure ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Aluminum Plasma

Aluminum plasma was generated by the irradiation of the targetwith Nd: YAG laser operated at a wavelength of 1064 nm. Theeffect of laser power density and the working pressure on spectrallines generating by laser ablation, were detected by using opticalspectroscopy. The electron density was measured using the Starkbroadening of aluminum lines and the electron temperature byBoltzmann plot method it is one of the methods that are used. Theelectron temperature Te, electron density ne, plasma frequencyand Debye length increased with increasing the laser peakpower. The electron temperature decrease with increasing gaspressure.

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.

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