scholarly journals Spectral study of argon-methane mixture plasma jet generated by a DC plasmatron

2021 ◽  
Vol 2100 (1) ◽  
pp. 012018
Author(s):  
D I Kavyrshin ◽  
M B Shavelkina ◽  
V F Chinnov ◽  
A S Miazin
Keyword(s):  
Emission Spectra ◽  
Optical Emission ◽  
Spectral Lines ◽  
Neutral Particles ◽  
Direct Excitation ◽  
Graphene Synthesis ◽  
Basic Set ◽  
Methane Mixture ◽  
Optical Emission Spectra ◽  
Mixture Plasma

Abstract We present the results of studying optical emission spectra of Ar:CH4 plasma produced on a DC plasmatron for graphene synthesis. We have identified the basic set of spectral lines and bands in the obtained spectra and shown that H lines and C2 bands appear due to direct excitation by an electron strike of corresponding neutral particles. C2 molecular bands were also identified in the spectra with intensity considerably lower compared to previous studies where He: C2H2 mixture was used as plasma-forming gas.

Computer-Controlled Densitometer for the Analysis of Photographically Recorded Optical Emission Spectra

1987 ◽  
Vol 41 (8) ◽  
pp. 1422-1427 ◽  
Author(s):  
Willard A. Hareland ◽  
Stephen E. Grant ◽  
Steven P. Ward ◽  
David R. Anderson
Keyword(s):  
High Speed ◽  
Emission Spectra ◽  
Optical Emission ◽  
Linear Measurement ◽  
Spectral Lines ◽  
Measurement Transducer ◽  
Computer Algorithms ◽  
High Speed Analysis ◽  
Computer Controlled ◽  
Optical Emission Spectra

A computer-controlled densitometer for data acquisition and high speed analysis of photographically recorded optical emission spectra has been developed. The instrument scans and digitizes spectra and stores the data sequentially in computer memory. A high-resolution linear measurement transducer mounted on a Jarrell-Ash densitometer monitors the plate position as the spectrum is scanned. The transducer measurement is accurate to within 0.001% over a range of about 340 mm on a glass photoplate. Computer algorithms for locating and identifying peaks and for calculating the wavelengths of spectral lines from their positions in the spectrum are described. With the use of a calibration curve based on the measured positions of three known spectral lines, the wavelength of any spectral line can be determined to within 0.005 nm, and the transmittance of a peak in the recorded spectrum can be measured to within 1%. The wavelengths and transmittances of all detectable spectral lines in the digitized emission spectrum are determined in less than two minutes.

scholarly journals Optical Emission Spectra of Oxygen Plasma Produced by Radio-Frequency Plasma

2009 ◽  
Vol 18 (2) ◽  
pp. 102-107
Author(s):  
Do-Yeob Kim ◽  
Min-Su Kim ◽  
Tae-Hoon Kim ◽  
Ghun-Sik Kim ◽  
Hyun-Young Choi ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Oxygen Plasma ◽  
Emission Spectra ◽  
Optical Emission ◽  
Radio Frequency Plasma ◽  
Frequency Plasma ◽  
Optical Emission Spectra

scholarly journals REFORMING OF ETHANOL IN PLASMA-CATALYTIC SYSTEM WITH DC AND AC ROTATING GLIDING DISCHARGE

2021 ◽  
pp. 117-121
Author(s):  
O.A. Nedybaliuk ◽  
T.A. Tereshchenko ◽  
I.I. Fedirchyk ◽  
P.V. Tyshchuk ◽  
V.P. Demchina
Keyword(s):  
Synthesis Gas ◽  
Emission Spectra ◽  
Optical Emission ◽  
Reaction Chamber ◽  
Catalytic Reforming ◽  
Instantaneous Power ◽  
Wide Aperture ◽  
Ethanol Reforming ◽  
Gliding Discharge ◽  
Optical Emission Spectra

The article presents the results of the investigation of the reforming of ethanol into synthesis gas using a plasmacatalytic system with either AC or DC wide-aperture rotating gliding discharge. Current and voltage oscillograms of the wide-aperture rotating gliding discharge were measured. The time-dependence of the instantaneous power of the discharge in the air was built. The photographs of the discharge in the airflow and discharge during the ethanol reforming were compared. The optical emission spectra of the plasmas of the torches of AC and DC wide-aperture rotating gliding discharges were studied. The rotational and vibrational temperatures of the plasma torch in the reaction chamber were determined. The results of the gas-chromatography of the synthesis gas produced during the plasm-catalytic reforming of ethanol using either AC or DC rotating gliding discharge are presented.

scholarly journals PREPARATION OF DIAMOND FILMS BY DC ARC DISCHARGE AND IN SITU MEASUREMENTS OF THE PLASMA BY OPTICAL EMISSION SPECTRA

1990 ◽  
Vol 39 (12) ◽  
pp. 1965
Author(s):  
ZHANG FANG-QING ◽  
ZHANG YA-FEI ◽  
YANG YING-HU ◽  
LI JING-QI ◽  
CHEN GUANG-HUA ◽  
...  
Keyword(s):  
Arc Discharge ◽  
Diamond Films ◽  
Emission Spectra ◽  
Optical Emission ◽  
In Situ Measurements ◽  
Dc Arc ◽  
Optical Emission Spectra
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