A photo-charge measurement system based on large dynamic photomultiplier tube (PMT) and current integration method is set up to capture the transient optical signal generated by the positive streamer in the test chamber of which the temperature is adjustable. The results of the luminescent radiation, including the photo-charge quantity, propagation velocity and morphology of the streamer, for the three-electrode and the rod-plate electrode arrangements are presented at different temperatures. The influence trend of temperature on streamer is similar in both arrangements. The pronounced feature of luminescent radiation in the low temperature air ranging from 173 to 293 K is that it has a positive correlation with the temperature. The photo-charge amount of the uniform and non-uniform field increases approximately linearly with the increase of external electric field and voltage, respectively. It is remarkable that the streamer channels become much clearer and brighter with the increase of the temperature. Furthermore, the real luminescent radiation intensity of streamer and the feather-like structure were also displayed by the nanosecond resolved ICCD images.

中文翻译：

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探测大气中正流光的发光辐射：低温实验

建立了基于大动态光电倍增管（PMT）和电流积分法的光电荷测量系统，用于捕获温度可调的试验室中正流光产生的瞬态光信号。给出了不同温度下三电极和棒板电极排列的发光辐射结果，包括光电荷量、传播速度和流光的形态。两种布置中温度对流光的影响趋势相似。173～293 K低温空气中发光辐射的显着特点是与温度呈正相关。均匀场和非均匀场的光电荷量分别随着外部电场和电压的增加而近似线性增加。值得注意的是，随着温度的升高，流光通道变得更加清晰和明亮。此外，流光和羽毛状结构的真实发光辐射强度也通过纳秒分辨的ICCD图像显示出来。