OES diagnostic of radicals in 33MHz radio-frequency Ar/C_2H_5OH atmospheric pressure plasma jet  

作　　者：Qianghua YUAN Pei REN Yongjie ZHOU Guiqin YIN Chenzhong DONG 袁强华;任佩;周永杰;殷桂琴;董晨钟(Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu province,College of Physics and Electronic Engineering,Northwest Normal University)

机构地区：[1]Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu province,College of Physics and Electronic Engineering,Northwest Normal University

出　　处：《Plasma Science and Technology》2019年第2期52-59,共8页等离子体科学和技术（英文版）

基　　金：support provided by National Natural Science Foundation of China (No. 11165012);Project of Natural Science Foundation of GanSu province (No. 145RJZA159);China Postdoctoral Science Foundation funded project (Nos. 2011M501494 and 2012T50831)

摘　　要：Ar/C_2H_5OH plasma jet is generated at atmospheric pressure by 33 MHz radio-frequency power source. This RF excitation frequencies which are higher than 13.56 MHz had rarely been used in atmospheric pressure plasma. The plasma characteristics of ethanol are investigated. The introduction of ethanol leads to the generation of four excited carbonaceous species C, CN, CH and C_2 in plasma, respectively. Optical emission intensities of four carbonaceous species were strengthened with ethanol content increasing in the range of 0-4600 ppm. The ethanol content increase results in all the Ar spectra lines decrease. The reason is that the electron temperature decreases when ethanol content is high. The emission intensity ratios of C/C_2, CN/C_2 and CH/C_2 decrease with the increase of ethanol content, showing that the relative amount of C_2 is increasing by increasing the ethanol flow. The emission intensity ratios of excited species did not change much with the increase of RF power in stable discharge mode.Ar/C_2H_5OH plasma jet is generated at atmospheric pressure by 33 MHz radio-frequency power source. This RF excitation frequencies which are higher than 13.56 MHz had rarely been used in atmospheric pressure plasma. The plasma characteristics of ethanol are investigated. The introduction of ethanol leads to the generation of four excited carbonaceous species C, CN, CH and C_2 in plasma, respectively. Optical emission intensities of four carbonaceous species were strengthened with ethanol content increasing in the range of 0-4600 ppm. The ethanol content increase results in all the Ar spectra lines decrease. The reason is that the electron temperature decreases when ethanol content is high. The emission intensity ratios of C/C_2, CN/C_2 and CH/C_2 decrease with the increase of ethanol content, showing that the relative amount of C_2 is increasing by increasing the ethanol flow. The emission intensity ratios of excited species did not change much with the increase of RF power in stable discharge mode.

关 键 词：ATMOSPHERIC pressure plasma optical emission spectroscopy RADICAL analysis 

分 类 号：O53[理学—等离子体物理] O657.3[理学—物理]