Correlation between excitation and electron temperature in 50 Hz pulsed Ar-O₂ mixture plasma

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• 作者：M. Imran^a ; N.U. Rehman^b ; ^{najeeb-ur-rehman@comsats.edu.pk" class="auth_mail" title="E-mail the corresponding author} ; M. Zaka-ul-Islam^c ; M. Shafiq^a ; M. Zakaullah^a
• 关键词：Excitation temperature ; Electron temperature ; Boltzmann plot ; Modified Boltzmann plot ; OES
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：127
• 期：6
• 页码：3312-3315
• 全文大小：680 K

文摘

Optical emission spectroscopy is employed to investigate the excitation temperature T_exc and electron temperature T_e in 50 Hz, pulsed DC Ar–O₂ mixture plasma. The excitation and electron temperatures are measured as function of current density, pressure and Ar concentration in the mixture. Boltzmann plot method is employed to estimate the excitation temperature T_exc whereas electron temperature T_e is calculated by using modified Boltzmann plot technique. The results show that both T_e and T_exc have similar trend i.e., both decreasing with increase in pressure while increasing trend is observed with increase in argon concentration in the mixture. On the other hand small variation is noted regarding change in current density. The results of correlation between electron and excitation temperature suggests that T_e can be measured indirectly from T_exc if the variation in ratio T_e/T_exc$T_e/T_{\text{exc}}$, as function of discharge parameters, has similar trend.