氮气大气压介质阻挡放电发射光谱诊断  

Diagnosis of optical emission spectrometry of atmospheric dielectric barrier discharges in N_2

作　　者：肖重发[1] 徐勇[1] 王文春[1] 王卫国[1] 朱爱民[1] 

机构地区：[1]大连理工大学等离子体物理化学实验室,辽宁大连116024

出　　处：《大连理工大学学报》2004年第5期625-629,共5页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(10075011).

摘　　要：用发射光谱法对氮气大气压介质阻挡放电等离子体进行了诊断,测出了N2(C3Пu-B3Пg)的337.1nm谱线强度随气体流量、电极间距、放电电压以及放电频率的变化规律.发现光强在气体流量为300mL/min或电极间距为1.5mm时有一个最大值;光强随放电电压及频率的增加而增强,但放电频率或电压增加到某一值时,光强的增强产生了突变,这时放电从丝状介质阻挡放电转变成准辉光介质阻挡放电;测得了放电电压电流波形、电压-电荷李萨如图形、时间分辨的发射光谱,发现丝状介质阻挡放电的微放电通道是随机分布独立存在的,相互不受影响;而准辉光介质阻挡放电的微放电通道之间产生叠加,并相互影响.N2 dielectric barrier discharges are diagnosticated by optical emission spectrometry, and the relationships between the intensity at 337.1 nm of N2(C3∏u -B3∏g) and gas flow, electrode gap, voltage and frequency of power supply are obtained. The intensity at 337.1 nm has a maximum value when gas flow rate is 300 mL/min or electrode gap is 1.5 mm; the intensity at 337.1 nm increases when voltage or frequency of power supply increases, but it has a sharp increasing when the voltage or frequency of power supply increases to some extent, at this time, filamentary dielectric barrier discharges transfer into homogeneous dielectric barrier discharges. The voltage and current of power supply and Lissajous figure are measured; in addition, the temporal resolution spectrometry at 337.1 nm is also measured. It is found that the microdischarges of filamentary dielectric barrier discharge are distributed at random, but those of homogeneous dielectric barrier discharges are overlapped and influenced by each other.

关 键 词：介质阻挡放电 微放电 发射光谱 光强 谱线强度 放电电压 李萨如图形 诊断 放电频率 突变 

分 类 号：O461[理学—电子物理学] R338.26[理学—物理]