Temporal Evolution of the Pulsed Positive Streamer Discharge in Water
Temporal Evolution of the Pulsed Positive Streamer Discharge in Water
复制标题
水中脉冲正流光放电的时间演化
DOI：
10.1109/tps.2011.2176516
复制
发表时间：
2012-01
影响因子：
1.5
通讯作者：
Ding, Zhen Feng
中科院分区：
文献类型：
--
作者：
Wen, Xiao Qiong;Liu, Gui Shi;Ding, Zhen Feng
利用高速摄影技术研究了水中脉冲正流光放电的时间演化过程。从同一放电脉冲中获得了四张连续的单次照片。从时间分辨图像中确定了两种传播模式，即第一模式和第二模式。第一模流光看起来像一个膨胀的发光等离子体球，在这个阶段没有灯丝可以识别。发光等离子体球的停留时间为40 ~ 60ns，最大半径为600 ~ 800 μm。然后，流光过渡到第二种模式，在这种模式下，许多发光的细丝从等离子体球中生长出来。在第二模式开始时，所有的细丝从等离子体球向各向同性传播，并且具有相同的传播速度。只有部分源自等离子体球的细丝能够继续繁殖，大部分在约40ns内自行消失。到达停止长度后，流光停止传播，但仍保持发光。随着放电电压的降低，流光的亮度降低，光从流光头到点阳极的尖端依次缩小。我们测量到的第一种模式的传播速度约为25km /s。当拖光从第一模式过渡到第二模式时，传播速度增加约两倍，然后在第一模式时大约减小到相同的值。在研究范围内，水的电导率对传播速度没有显著影响。
The temporal evolution of the pulsed positive streamer discharge in water is investigated by high-speed photography. Four successive one-shot photographs were acquired from the same discharge pulse. Two modes of streamer propagation, called the first mode and the second mode, were confirmed from the time-resolved images. The first-mode streamer appears as an expanding luminous plasma ball, and no filament can be recognized at this stage. The standing time and the maximum radius of the luminous plasma ball are 40-60 ns and 600-800 μm, respectively. Then, the streamer transits to the second mode, in which many luminous filaments grow up from the plasma ball. At the beginning of the second mode, all the filaments propagate isotropically from the plasma ball and have an equal propagation velocity. Only some of the filaments originated from the plasma ball can propagate furthermore, and most of them spontaneously disappear in about 40 ns. After it reaches the stopping length, the streamer stops propagating but remains luminous. As the discharge voltage drops down, the brightness of the streamer decreases, and the light shrinks successively from the streamer head to the tip of the point anode. Our measured propagation velocity for the first mode is about 25 km/s. The propagation velocity increases about two times as the streamer transits from the first mode to the second mode and then reduces approximately to the same value for the first mode. The water conductivity has no significant influence on the propagation velocity within the range studied.
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DOI：
10.1109/ppc.2009.5386375
发表时间：
2009-06
期刊：
2009 IEEE Pulsed Power Conference
影响因子：
--
作者：
P. Ceccato;O. Guaitella;L. Shaper;B. Graham;A. Rousseau
通讯作者：
P. Ceccato;O. Guaitella;L. Shaper;B. Graham;A. Rousseau
影响因子：
1.5
作者：
Abou-Ghazala, A;Katsuki, S;Moreira, KR
通讯作者：
Moreira, KR
DOI：
10.1109/94.368641
发表时间：
1994-12-01
影响因子：
3.1
作者：
JONES, HM;KUNHARDT, EE
通讯作者：
KUNHARDT, EE
影响因子：
3.8
作者：
A. Starikovskiy;Yong Yang;Young I Cho;A. Fridman
通讯作者：
A. Starikovskiy;Yong Yang;Young I Cho;A. Fridman
影响因子：
1.5
作者：
Gupta, Suryakant B.;Bluhm, Hansjoachim
通讯作者：
Bluhm, Hansjoachim