Power spectral fractalysis: a surrogate method for laser-induced plasma temperature analysis

2021 ◽  
Author(s):  
S. Sankararaman
Keyword(s):  
Plasma Temperature ◽  
Temperature Analysis ◽  
Laser Induced Plasma ◽  
Power Spectral ◽  
Surrogate Method

DIAGNOSTICS OF LASER INDUCED GRAPHITE PLASMA UNDER VARIOUS PRESSURES OF AIR, HELIUM AND ARGON

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Zuhaib Haider ◽  
Kashif Chaudhary ◽  
Sufi Roslan ◽  
Jalil Ali ◽  
Yusof Munajat
Keyword(s):  
Electron Density ◽  
Laser Energy ◽  
Ambient Pressure ◽  
Plasma Temperature ◽  
Sample Surface ◽  
Ambient Atmosphere ◽  
Plasma Parameters ◽  
Saha Equation ◽  
Laser Induced Plasma ◽  
Spectroscopic Information

Laser induced plasma provides information about the elemental composition of sample surface and through spectroscopy vital information about plasma dynamics can be obtained. In this paper we present the diagnostics of laser induced plasma at various pressures of Air, Helium and Argon gases. Graphite sample was ablated with Q-smart 850 laser while spectra were captured  Plasma parameters have been calculated by using well known methods based on Saha and Boltzmann equations. Plasma temperature was calculated relative intensity of ionic carbon lines CII 251.21 nm and CII 426.73 nm while the electron density was determined by using spectroscopic information of CI 247.85 nm and CII 426.73 nm emission lines in Saha equation. Plasma temperature and electron density were found to be dependent upon nature and pressure of the ambient atmosphere. Higher temperatures and electron densities were obtained in the presence of Air as ambient environment that is attributed to electrical and physical properties of the Air. Keeping into consideration the plasma expansion in various environments the selection of a suitable ambient pressure can be made on the basis of spectral diagnostics of plasma for a particular laser energy to obtain desirable plasma temperature and electron density suited for certain applications.

Measurements of laser-induced plasma temperature field in deep penetration laser welding

2013 ◽  
Vol 45 ◽  
pp. 551-557 ◽  
Author(s):  
Genyu Chen ◽  
Mingjun Zhang ◽  
Zhi Zhao ◽  
Yi Zhang ◽  
Shichun Li
Keyword(s):  
Temperature Field ◽  
Laser Welding ◽  
Plasma Temperature ◽  
Deep Penetration ◽  
Laser Induced Plasma

Effects of non-uniformity of laser induced plasma on plasma temperature and concentrations determined by the Boltzmann plot method: implications from plasma modeling

2010 ◽  
Vol 25 (10) ◽  
pp. 1643 ◽  
Author(s):  
I. B. Gornushkin ◽  
S. V. Shabanov ◽  
S. Merk ◽  
E. Tognoni ◽  
U. Panne
Keyword(s):  
Plasma Temperature ◽  
Plasma Modeling ◽  
Boltzmann Plot ◽  
Laser Induced Plasma

scholarly journals Time-resolved aluminium laser-induced plasma temperature measurements

2014 ◽  
Vol 548 ◽  
pp. 012046 ◽  
Author(s):  
D M Surmick ◽  
C G Parigger
Keyword(s):  
Plasma Temperature ◽  
Temperature Measurements ◽  
Time Resolved ◽  
Laser Induced Plasma

scholarly journals Studies on the ns-IR-Laser-Induced Plasma Parameters in the Vanadium Oxide

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Arnab Sarkar ◽  
Raju V. Shah ◽  
D. Alamelu ◽  
Suresh K. Aggarwal
Keyword(s):  
Vanadium Oxide ◽  
Electron Density ◽  
Plasma Temperature ◽  
Spectroscopic Studies ◽  
Decay Rates ◽  
Plasma Parameters ◽  
Boltzmann Plot ◽  
Saha Equation ◽  
Laser Induced Plasma ◽  
Light Pulses

We report spectroscopic studies of laser-induced plasma (LIP) produced by ns-IR-Nd:YAG laser light pulses of different energies onto four different oxides of vanadium (VO, V2O3, VO2, and V2O5) in air under atmospheric pressure. For each oxide with a different oxidation state of vanadium, both electron density and plasma temperature were calculated for different time delays and laser pulse energies. The plasma temperature was determined from Boltzmann plot method, whereas the electron number density was estimated from the Saha equation. The decay rates for plasma temperature as well as electron density were observed to follow power law and were independent of the nature of vanadium oxide. These investigations provide an insight to optimize various parameters during LIBS analysis of vanadium-based matrices.

Determination of laser-induced plasma temperature

2000 ◽  
Vol 25 (4) ◽  
pp. 231-233
Author(s):  
Zhong-Hua Shen ◽  
Bao-Ming Bian ◽  
Xiao-Wu Ni ◽  
Jian Lu ◽  
Shu-Yi Zhang
Keyword(s):  
Plasma Temperature ◽  
Laser Induced Plasma

Laser-induced plasma temperature

2014 ◽  
Vol 97 ◽  
pp. 13-33 ◽  
Author(s):  
Shudi Zhang ◽  
Xiaohua Wang ◽  
Miaohong He ◽  
Yunbin Jiang ◽  
Bochao Zhang ◽  
...  
Keyword(s):  
Plasma Temperature ◽  
Laser Induced Plasma

A simple method for laser-induced plasma diagnostics under condition of optically thin

2016 ◽  
Vol 30 (16) ◽  
pp. 1650197 ◽  
Author(s):  
Jian He ◽  
Qingguo Zhang
Keyword(s):  
Electron Density ◽  
Plasma Diagnostics ◽  
Plasma Temperature ◽  
Spectral Lines ◽  
Simple Method ◽  
Laser Induced Plasma ◽  
Spectral Diagnostics ◽  
Order Of Magnitude ◽  
Density Diagnostics ◽  
Copper Plasma

For simple plasma diagnostics for laser-induced plasma (LIP) under the condition of optically thin, taking the Cu I spectral lines produced by the laser-induced copper plasma, we investigate a simple method for temperature and electron density diagnostics, and we obtain the plasma temperature which has 104 K order of magnitude and the averaged electron density is [Formula: see text], which are in agreement with that obtained by other methods. This investigation will be significant for spectral diagnostics for LIP.

Correlation between laser-induced plasma temperature and CN radical molecule emission during tree burning

Optik ◽  
2020 ◽  
Vol 224 ◽  
pp. 165670
Author(s):  
Yihui Yan ◽  
Yuzhu Liu ◽  
Qihang Zhang ◽  
Pengfei Ding
Keyword(s):  
Plasma Temperature ◽  
Laser Induced Plasma
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