Diagnostic techniques for atmospheric streamer discharges
Diagnostic techniques for atmospheric streamer discharges
复制标题
大气流光放电诊断技术
DOI：
10.1049/ip-smt:19941017
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
W. Rutgers
中科院分区：
文献类型：
--
作者：
Y. Creyghton;V. Veldhuizen;W. Rutgers
大气流光放电的分析需要快速的电学和光学诊断。这是说明的情况下，正流光电晕产生沿着线电极的高电压脉冲上升时间为几十纳秒。具有高时间分辨率的电气测量揭示了两个放电阶段（初级和次级流光）的能量输入。放电结构是可视化使用门控图像增强器。确定了阳极丝单位长度上的拖缆数和拖缆直径。拖缆速度的测量与飞行时间的方法，使用两个光纤。N2和N3发射线强度比的时间分辨光谱测量表明，初级流光阶段的平均电子能量显著高于随后的次级流光。放电中的中性气体温度由N1发射线的旋转结构确定，并且仅略高于背景气体温度。纹影照相机可视化残余流光通道中的热耗散。
Fast electrical and optical diagnostics are required for the analysis of atmospheric streamer discharges. This is illustrated for the case of positive streamer corona produced along wire electrodes by high voltage pulses with rise times of tens of nanoseconds. Electrical measurements with a high time resolution reveal the energy input in two discharge phases (primary and secondary streamer). The discharge structure is visualised using a gated image intensifier. The number of streamers per unit length of anode wire and the streamer diameter are determined. The streamer velocity is measured with a time-of-flight method using two optical fibres. Time-resolved spectro- scopic measurements of the intensity ratio of N: and N, emission lines reveal that the average elec- tron energy in the primary streamer phase is sig- nificantly higher than in the subsequent secondary streamer. The neutral gas temperature in the dis- charge is determined from the rotational structure of an N, emission line and is only slightly above the background gas temperature. Schlieren pho- tographs visualise the heat dissipated in residual streamer channels.