Evaluation of plasma absorption and inhomogeneity by line profiles in the plasma emission spectra

2004 ◽  
Vol 54 (S3) ◽  
pp. C897-C902
Author(s):  
K. Yu. Catsalap ◽  
E. A. Ershov-Pavlov ◽  
K. L. Stepanov
Keyword(s):  
Emission Spectra ◽  
Plasma Emission ◽  
Line Profiles ◽  
Plasma Absorption

Systematic investigation of plasma emission spectra during microwave diamond deposition from CH4CO2 and C2H2CO2 gas mixtures

1993 ◽  
Vol 2 (2-4) ◽  
pp. 389-392 ◽  
Author(s):  
G. Balestrino ◽  
M. Marinelli ◽  
E. Milani ◽  
A. Paoletti ◽  
P. Paroli ◽  
...  
Keyword(s):  
Emission Spectra ◽  
Gas Mixtures ◽  
Systematic Investigation ◽  
Plasma Emission ◽  
Diamond Deposition ◽  
Co2 Gas

scholarly journals Laser-Plasma and Self-Absorption Measurements with Applications to Analysis of Atomic and Molecular Stellar Astrophysics Spectra

Atoms ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 63 ◽  
Author(s):  
Christian G. Parigger ◽  
Christopher M. Helstern ◽  
Ghaneshwar Gautam
Keyword(s):  
Molecular Species ◽  
Laser Plasma ◽  
Emission Spectra ◽  
Hydrogen Gas ◽  
Spectral Radiance ◽  
Pure Hydrogen ◽  
Line Profiles ◽  
Emission Data ◽  
Balmer Series ◽  
Gaseous Mixtures

This work discusses laboratory measurements of atomic and diatomic molecular species in laser-plasma generated in gases. Noticeable self-absorption of the Balmer series hydrogen alpha line occurs for electron densities of the order of one tenth of standard ambient temperature and pressure density. Emission spectra of selected diatomic molecules in air or specific gaseous mixtures at or near atmospheric pressure reveal minimal plasma re-absorption. Abel inversion of the plasma in selected gases and gas mixtures confirm expansion dynamics that unravel regions of atomic and molecular species of different electron temperature and density. Time resolved spectroscopy diagnoses self-absorption of hydrogen alpha and hydrogen beta lines in ultra-high pure hydrogen gas. Radiation from a Nd:YAG laser device induces micro-plasma for pulse widths in the range of 6–14 ns, energies in the range of 100–800 mJ, and peak irradiances of the order 1–10 TW/cm 2 . Atomic line profiles yield electron density and temperature from fitting of line profiles to wavelength and sensitivity corrected spectral radiance data. Analysis of measured diatomic emission data yields excitation temperature of primarily molecular recombination spectra. Applications of the laboratory experiments extend to investigations of stellar astrophysics white dwarf spectra.

Effect of nearest-neighbor ions on excited ionic states, emission spectra, and line profiles in hot and dense plasmas

1991 ◽  
Vol 44 (2) ◽  
pp. 1270-1280 ◽  
Author(s):  
D. Salzmann ◽  
J. Stein ◽  
I. B. Goldberg ◽  
R. H. Pratt
Keyword(s):  
Nearest Neighbor ◽  
Emission Spectra ◽  
Line Profiles ◽  
Dense Plasmas ◽  
Ionic States

Plasma Emission Spectroscopy and Chemical Analysis of Amorphous Hydrogenated Carbon

1986 ◽  
Vol 68 ◽  
Author(s):  
Chang Soo Park ◽  
Jeffrey R. Bodart ◽  
He-Xiang Han ◽  
Bernard J. Feldman
Keyword(s):  
Thin Films ◽  
Chemical Composition ◽  
Emission Spectroscopy ◽  
Emission Spectra ◽  
Plasma Emission ◽  
Combustion Analysis ◽  
Bond Strengths ◽  
Plasma Emission Spectroscopy ◽  
Amorphous Hydrogenated Carbon ◽  
Kinetics Of

AbstractThe emission spectra of various hydrocarbon plasmas used in the growth of amorphous hydrogenated carbon (α-C:H) thin films have been measured.The presence of CH, H, H2, and C2 species in the plasma have been observed.The chemical composition of the α-C:H films was determined by combustion analysis and shows roughly equal atomic concentrations of H and C and a surprising large concentration of 0.The plasma emission spectra and chemical composition results can be partially understood in terms of relative bond strengths of the different molecules involved, and these results give some insights into the growth kinetics of α-C:H thin films.

Diagnostics of plasma emission spectra during electron assisted chemical vapor deposition of diamond films

1998 ◽  
Vol 5 (5) ◽  
pp. 1541-1544 ◽  
Author(s):  
Xiao-Dong Zhu ◽  
Min Hu ◽  
Ru-Juan Zhan ◽  
Xiao-Hui Wen ◽  
Hai-Yang Zhou
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Diamond Films ◽  
Emission Spectra ◽  
Chemical Vapor ◽  
Plasma Emission
Sign in / Sign up

Export Citation Format

Share Document