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Effect of laser intensity on microwave radiation generated in nanosecond laser-plasma interactions

文献类型：期刊论文

作者Jiang Wei-Man2,3; Li Yu-Tong1,2,3; Zhang Zhe2; Zhu Bao-Jun2,3; Zhang Yi-Hang2,3; Yuan Da-Wei4; Wei Hui-Gang4; Liang Gui-Yun4; Han Bo5; Liu Chang5
刊名ACTA PHYSICA SINICA
出版日期2019-06-20
卷号68期号:12页码:9
ISSN号1000-3290
关键词intense laser microwave radiation electromagnetic disturbance nanosecond laser plasma
DOI10.7498/aps.68.20190501
英文摘要Microwave radiation in several gigahertz frequency band is a common phenomenon in laser-plasma interactions. It can last hundreds of nanoseconds and cause huge electromagnetic pulse disturbances to electrical devices in experiments. It has been found that the microwave radiation might originate from the oscillation of charged chambers, the return current on target holders, the dipole radiation, the quadrupole radiation, and the electron bunch emitted from the plasma to the vacuum. The microwave radiation waveform, frequency spectrum, and intensity depend on many factors such as laser pulse, target, and chamber parameter. To distinguish the microwave radiation mechanisms, the influence of the experimental parameters on the radiation characteristics should be investigated systematically. In this paper we investigate the microwave radiation influenced by the laser intensity in nanosecond laser-plasma interactions. It is found that the microwave radiation intensity varies nonmonotonically with the laser intensity. For the lower laser intensity, the radiation intensity first increases and then decreases with laser intensity increasing, the radiation field continuously oscillates in tens of nanoseconds, and the radiation spectrum contains two components below and above 0.3 GHz, respectively. For the higher laser intensity, the radiation intensity increases with the laser intensity increasing, the radiation field has a unipolar radiation lasting tens of nanoseconds, and the radiation spectrum mainly includes the component below 0.3 GHz. The waveform and spectrum analysis show that these phenomena are due to the difference of the radiation mechanisms at different laser intensities. The frequency component below and above 0.3 GHz are induced by the electron bunch emitted from the plasma to the vacuum and the dipole radiation respectively. At low laser intensity, both the dipole radiation and the electron bunch emitted from the plasma contribute to the microwave radiation. At high laser intensity, the microwave radiation is mainly produced by the electron beam emitted from the plasma to the vacuum. This work is significant for understanding the microwave radiation mechanisms in nanosecond laser-plasma interactions, and implies the potential to provide a reference to the diagnosing of the escape electrons and the sheath field on the target surface by the microwave radiation in laser-plasma interaction.
WOS关键词ELECTROMAGNETIC PULSES ; EMISSION ; BEAMS
资助项目Science Challenge Project, China[TZ2016005] ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences)[112111KYSB20160015] ; National Natural Science Foundation of China[11520101003] ; National Natural Science Foundation of China[11827807] ; National Natural Science Foundation of China[11861121001] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB16010000]
WOS研究方向Physics
语种英语
出版者CHINESE PHYSICAL SOC
WOS记录号WOS:000472505500019
资助机构Science Challenge Project, China ; Science Challenge Project, China ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Science Challenge Project, China ; Science Challenge Project, China ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Science Challenge Project, China ; Science Challenge Project, China ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Science Challenge Project, China ; Science Challenge Project, China ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; CAS-JSPS Joint Research Program (External Cooperation Program of the BIC, Chinese Academy of Sciences) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.bao.ac.cn/handle/114a11/26571]  
专题中国科学院国家天文台
通讯作者Li Yu-Tong; Zhang Zhe
作者单位1.Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
5.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
6.Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
7.China Acad Engn Phys, Shanghai Inst Laser Plasma, Shanghai 201800, Peoples R China
8.Shanghai Jiao Tong Univ, CICIFSA, Shanghai 200240, Peoples R China
推荐引用方式
GB/T 7714		 Jiang Wei-Man,Li Yu-Tong,Zhang Zhe,et al. Effect of laser intensity on microwave radiation generated in nanosecond laser-plasma interactions[J]. ACTA PHYSICA SINICA,2019,68(12):9.
APA Jiang Wei-Man.,Li Yu-Tong.,Zhang Zhe.,Zhu Bao-Jun.,Zhang Yi-Hang.,...&Zhang Jie.(2019).Effect of laser intensity on microwave radiation generated in nanosecond laser-plasma interactions.ACTA PHYSICA SINICA,68(12),9.
MLA Jiang Wei-Man,et al."Effect of laser intensity on microwave radiation generated in nanosecond laser-plasma interactions".ACTA PHYSICA SINICA 68.12(2019):9.

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来源：国家天文台

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