Hα line Doppler broadening in a glow discharge cathode region in the argon-hydrogen mixture

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Zobnin, A.V.^1 ; Usachev, A.D.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Cathode region;    Direct-current discharge;    Discharge gaps;    Doppler profile;    Effective temperature;    Excited atoms;    Spectral line;    Spectral measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012142/pdf
DOI  :  10.1088/1742-6596/653/1/012142

来源: IOP

【 摘 要 】

Spectral measurements of Doppler profiles of the hydrogen Hαspectral line in a glow direct current discharge in a mixture of 1% hydrogen in argon at pressures of 60, 120 and 180 Pa were performed. Solid and mesh cathodes were used. It is brought out that the line shapes are Gaussian with the width corresponding to the effective temperature of the excited atoms of 35-60 eV for emission from the cathode region. The line width does not change with the pressure and the distance from cathode in the region of negative glowing and increases slightly with the distance from the mesh cathode outside of the discharge gap.