C2 Swan spectrum used as a molecular pyrometer in transferred arc and the influence noise to signal ratio on the temperature values

15th International Congress on Plasma Physics; 13th Latin American Workshop on Plasma Physics

Nassar, H.^1

Lebanese University, FSP, Section IV, Karak Zahlé, Lebanon^1

关键词: Inverted spectra;    Linear CCD arrays;    Molecular emission spectrums;    Noise-to-signal ratios;    Point to point;    Rotational temperature;    Temperature values;    Transferred arcs;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/511/1/012066/pdf
DOI  :  10.1088/1742-6596/511/1/012066

来源: IOP

【 摘 要 】

The C2Swan system molecular emission spectrum is frequently observed in arc plasmas containing hydrocarbons. The spectra emitted from 5 kw in the transferred arc reactor at atmospheric pressure by CH4/CO2/Ar mixture are recorded with the help of an optical system consisting of a linear CCD array coupled with 2m spectrometer. The rotational temperature of 4300±300K is found from the experimental Abel inverted spectra in the arc center after a point-to-point comparison of the spectrum with a computer simulated one. The influence of the noise to signal ratio has been studied, if the noise to signal ratio is about 10% we found an error of 7% at temperature 3000K and 10% at 6000K.