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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：Professor Dr. Hongbin Ding
其他任职：物理学院学术委员会主任，等离子体联合研究中心主任,中国光学工程学会LIBS专委会副主任, 中国核学会核聚变等离子体分会常务理事，辽宁省物理学会副理事长，国际ITER-ITPA 委员
性别：男
毕业院校：巴塞尔大学
学位：博士
所在单位：物理学院
学科：等离子体物理. 光学工程
联系方式：hding@dlut.edu.cn
电子邮箱：hding@dlut.edu.cn
Time-resolved measurements of NO2 concentration in pulsed discharges by high-sensitivity cavity ring-down spectroscopy
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论文类型：期刊论文
发表时间：2017-05-01
发表刊物：PLASMA SCIENCE & TECHNOLOGY
收录刊物：SCIE、EI
卷号：19
期号：5
ISSN号：1009-0630
关键字：CRDS; ns-pulsed discharge; time evolution of NO2 concentration
摘要：To describe the complex kinetics of formation and destruction mechanism of nitrogen dioxide (NO2), there is an increasing demand for real-time and in situ analysis of NO2 in the discharge region. Pulsed cavity ring-down spectroscopy (CRDS) provides an excellent diagnostic approach. In the present paper, CRDS has been applied in situ for time evolution measurement of NO2 concentration which is rarely investigated in gas discharges. In pulsed direct current discharge of NO2/Ar mixture at a pressure of 500 Pa, a peak voltage of -1300V and a frequency of 30 Hz, for higher initial NO2 concentration (3.05 x 10(14) cm(-3), 8.88 x 10(13) cm(-3)), the NO2 concentration sharply decreases at the beginning of the discharge afterglow and then becomes almost constant, and the pace of decline increases with pulse duration; however, for lower initial NO2 concentration of 1.69 x 10(13) cm(-3), the NO2 concentration also decreases at the beginning of the discharge afterglow for 200 ns and 1 mu s pulse durations, while it slightly increases and then declines for 2 mu s pulse duration. Thus, the removal of low-level NO2 could not be promoted by a higher mean energy input.