| 神光-Ⅲ原型高功率激光装置电磁脉冲辐射 |
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| 引用本文： | 杨为明,王传珂,易 涛,李廷帅,高崇信,王 锐,张 健,王保清,刘慎业,丁永坤,江少恩.神光-Ⅲ原型高功率激光装置电磁脉冲辐射[J].太赫兹科学与电子信息学报,2016,14(6):905-909. |
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| 作者姓名： | 杨为明 王传珂 易 涛 李廷帅 高崇信 王 锐 张 健 王保清 刘慎业 丁永坤 江少恩 |
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| 作者单位： | Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,School of Energy Science and Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,1.Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China;2.School of Energy Science and Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,School of Energy Science and Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,1.Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China;2.School of Energy Science and Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China and Research Center of Laser Fusion，China Academy of Engineering Physics，Mianyang Sichuan 621999，China |
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| 基金项目： | 国家自然科学基金资助项目(11105129)；中国工程物理研究院科学技术发展基金资助项目(2014B0102011；2014B0102012) |
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| 摘 要： | 实验测量了神光-III原型装置上脉冲强激光与金属靶相互作用产生的电脉冲辐射，电脉冲峰值梯度为3 kV/m，频谱范围大约在50 MHz?2 GHz，在160 MHz等处有明显的特征峰，信号持续时间大约60 ns。本文研究表明电偶极辐射是打靶过程产生电磁脉冲信号的来源之一，由理论模型计算得到频率为160 MHz的特征峰，并计算出探测点电场脉冲峰值梯度约为2 kV/m，辐射总功率约105 W，能量转换率约10-6，辐射功率近似正比于激光能量的4/3次方，可见激光能量越大，功率密度越高，电脉冲的辐射强度越大。大型激光装置上的激光与靶作用产生的电磁脉冲测量，对大型激光装置产生的电磁辐射的防护有重要指导作用，在等离子体诊断等领域也有潜在应用价值。
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| 关 键 词： | 激光等离子体相互作用 电磁脉冲 天线 偶极辐射 |
| 收稿时间： | 2015/7/23 0:00:00 |
| 修稿时间： | 2015/9/17 0:00:00 |
Investigation of electromagnetic pulse emission from Shenguang high power laser facilities |
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| YANG Weiming,WANG Chuanke,YI Tao,LI Tingshuai,GAO Chongxin,WANG Rui,ZHANG Jian,WANG Baoqing,LIU Shenye,DING Yongkun and JIANG Shaoen.Investigation of electromagnetic pulse emission from Shenguang high power laser facilities[J].Journal of Terahertz Science and Electronic Information Technology,2016,14(6):905-909. |
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| Authors: | YANG Weiming WANG Chuanke YI Tao LI Tingshuai GAO Chongxin WANG Rui ZHANG Jian WANG Baoqing LIU Shenye DING Yongkun and JIANG Shaoen |
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| Abstract: | Electromagnetic pulse emission of Shenguang-III prototype laser facilities from pulse-laser-irradiated metallic target is evaluated by using B-dot. An electric signal lasting for about 60 ns is detected in the experiment, with radiated field up to 3 kV/m and frequency bins for 0.1 GHz-2 GHz which has an obvious peak at 160 MHz. The results demonstrate that the model of dipole radiation is one of the major mechanisms of electromagnetic pulse emission from laser-target interaction. The dipole radiation model can produce about 105 W, 160 MHz central frequency electromagnetic pulse with an energy conversion efficiency of 10-6 according to the calculation, and the electric field of antenna position is about 2 kV/m. This experiment evaluates the electromagnetic pulse emission from pulse-laser-irradiated metallic target on Shenguang-III prototype laser facilities, which is of great significance for shielding electromagnetic disturbance of diagnostics on large laser facilities. Moreover, investigation of eletromagnetic pulse emission may have many potential applications. |
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