Experimental study of the influence of nitrogen admixture on characteristics of DC glow discharge in He gas

The influence of nitrogen admixture on the characteristics and various plasma parameters in DC He discharge at low pressure was studied experimentally. It was shown that the addition of nitrogen leads to noticeable increase in discharge current at the same discharge voltage and gas pressure. Contrary, the breakdown voltage and the cathode fall thickness were observed to decrease with the addition of nitrogen. Single Langmuir probe measurements for determination of plasma parameters (electron energy distribution functions, electron temperature, ion density and electron density) in He and (He-N2) gases were performed and explanation of observed effects were given

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