| 飞秒激光引导闪电的模拟实验研究 |
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| 引用本文： | 张喆,鲁欣,郝作强,张适昌,张东东,王兆华,马媛媛,严萍,张杰. 飞秒激光引导闪电的模拟实验研究[J]. 物理学报, 2007, 56(9): 5293-5297 |
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| 作者姓名： | 张喆 鲁欣 郝作强 张适昌 张东东 王兆华 马媛媛 严萍 张杰 |
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| 作者单位： | (1)中国科学院电工研究所，北京 100080; (2)中国科学院物理研究所，北京凝聚态物理国家实验室，北京 100080 |
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| 摘 要： | 采用能量40 mJ，脉冲宽度50 fs的超短脉激光脉冲形成的等离子体通道诱发和引导了3—23 cm长间隙的静态高压放电.实验观测显示，等离子体通道整体上能使空气间隙的击穿阈值降低到自然击穿阈值的40％.实验中通过对放电电弧发出的白光信号与激光信号的时间延迟进行分析得到激光引导下梯级先导的发展速度约为107 cm/s.关键词：等离子体通道高压放电
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| 关 键 词： | 等离子体通道 高压放电 |
| 文章编号： | 1000-3290/2007/56(09)/5293-05 |
| 收稿时间： | 2006-05-22 |
| 修稿时间： | 2006-05-22 |
Laboratory simulation of femtosecond laser guided lightning discharge |
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| Zhang Zhe,Lu Xin,Hao Zuo-Qiang,Zhang Shi-Chang,Zhang Dong-Dong,Wang Zhao-Hua,Ma Yuan-Yuan,Yan Ping,Zhang Jie. Laboratory simulation of femtosecond laser guided lightning discharge[J]. Acta Physica Sinica, 2007, 56(9): 5293-5297 |
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| Authors: | Zhang Zhe Lu Xin Hao Zuo-Qiang Zhang Shi-Chang Zhang Dong-Dong Wang Zhao-Hua Ma Yuan-Yuan Yan Ping Zhang Jie |
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| Affiliation: | 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; 2 Institute of Electriecd Engineering, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | We triggered and guided the stationary electric field discharges in 3—23 cm long air gaps by using plasma channels produced by 40mJ ultrashort laser pulses. We have observed that the plasma channel reduced the discharge breakdown voltage to 40% of its natural value. By analyzing the delay between the laser pulse and the white light emission of discharge, we evaluated the speed of the stepped leader with laser guiding to be about 107 cm/s. |
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| Keywords: | plasma channel discharge |
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