Electric field step in air gap streamer discharges
Electric field step in air gap streamer discharges
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DOI：
10.1063/1.3665633
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发表时间：
2011-11
影响因子：
4
通讯作者：
R. Zeng;C. Zhuang;Zhanqing Yu;Zhizhao Li;Y. Geng
中科院分区：
文献类型：
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作者：
R. Zeng;C. Zhuang;Zhanqing Yu;Zhizhao Li;Y. Geng
通过专门开发的集成电光传感器测量正雷电脉冲下气隙流光放电中的电场（E 场）。观察到电场阶跃现象。电场首先与拉普拉斯场一致，然后突然增加，上升时间为μs。这种现象发生的概率随着施加电压的增加而增加。放电电流波形和快速相机拍摄的照片证明电场阶跃是由空间净电荷引起的。根据E步上升时间和电晕面积范围，估计实验情况下的平均电子漂移速度约为0.2 × 106 – 0.6 × 106 m/s。
Electric field (E-field) in air gap streamer discharges under positive lightning impulse was measured by specifically developed integrated electro-optic sensors. An E-field step phenomenon was observed. The E-field firstly agreed with the Laplace field, then suddenly increased with a rise time of μs. The occurrence probability of this phenomenon increased as the applied voltage increased. The discharge current waveforms and photos taken by a fast camera prove the E-field step was caused by the space net charge. From the E-step rise time and the corona area range, the average electron drift speed under the experiment situation was estimated about 0.2 × 106 – 0.6× 106 m/s.