中国物理B ›› 2022, Vol. 31 ›› Issue (2): 25205-025205.doi: 10.1088/1674-1056/ac3735

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Analysis of electromagnetic pulses generated from ultrashort laser irradiation of solid targets at CLAPA

Yi-Lin Xu(徐毅麟)1, Dong-Yu Li(李东彧)2, Ya-Dong Xia(夏亚东)2, Si-Yuan Zhang(张思源)2, Min-Jian Wu(吴旻剑)2, Tong Yang(杨童)2, Jun-Gao Zhu(朱军高)2, Hao Cheng(程浩)2, Chuan-Ke Wang(王传珂)3, Chen Lin(林晨)2,†, Ting-Shuai Li(李廷帅)1,‡, and Xue-Qing Yan(颜学庆)2   

  1. 1 School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China;
    2 State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China;
    3 Research Center of Laser Fusion, China Academy of Engineering Physics(CAEP), Mianyang 621900, China
  • 收稿日期:2021-08-06 修回日期:2021-10-21 接受日期:2021-11-06 出版日期:2022-01-13 发布日期:2022-01-22
  • 通讯作者: Chen Lin, Ting-Shuai Li E-mail:lc0812@pku.edu.cn;litingshuai@uestc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11975037 and 11921006) and the National Grand Instrument Project of China (Grant Nos. 2019YFF01014400 and 2019YFF01014404).

Analysis of electromagnetic pulses generated from ultrashort laser irradiation of solid targets at CLAPA

Yi-Lin Xu(徐毅麟)1, Dong-Yu Li(李东彧)2, Ya-Dong Xia(夏亚东)2, Si-Yuan Zhang(张思源)2, Min-Jian Wu(吴旻剑)2, Tong Yang(杨童)2, Jun-Gao Zhu(朱军高)2, Hao Cheng(程浩)2, Chuan-Ke Wang(王传珂)3, Chen Lin(林晨)2,†, Ting-Shuai Li(李廷帅)1,‡, and Xue-Qing Yan(颜学庆)2   

  1. 1 School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China;
    2 State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China;
    3 Research Center of Laser Fusion, China Academy of Engineering Physics(CAEP), Mianyang 621900, China
  • Received:2021-08-06 Revised:2021-10-21 Accepted:2021-11-06 Online:2022-01-13 Published:2022-01-22
  • Contact: Chen Lin, Ting-Shuai Li E-mail:lc0812@pku.edu.cn;litingshuai@uestc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11975037 and 11921006) and the National Grand Instrument Project of China (Grant Nos. 2019YFF01014400 and 2019YFF01014404).

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摘要： Electromagnetic pulses (EMPs) produced by the interaction of a TW femtosecond laser with solid targets at the Compact Laser Plasma Accelerator (CLAPA) are measured and interpreted. The statistical results confirm that the intensities of the EMPs are closely related to both target material and thickness. The signal of the titanium target is more abundant than that of the copper target with the same thickness, and the intensity of EMP is positively correlated with the target thickness for aluminium foil. With the boosted EMP radiations, the energy of accelerated protons is also simultaneously enhanced. In addition, EMPs emitted from the front of the target exceed those from the rear, which are also pertinent to the specific target position. The resonant waveforms in the target chamber are analyzed using the fast Fourier transform, and the local resonance and the attenuation lead to changes of the frequency spectra of EMPs with variation of detecting positions, which is well supported by the modeling results. The findings are beneficial to gaining insight into the mechanism of EMP propagation in a typical target chamber and providing more information for EMP shielding design.

关键词: laser driven proton accleration, electromagnetic pulses, laser, target

Abstract: Electromagnetic pulses (EMPs) produced by the interaction of a TW femtosecond laser with solid targets at the Compact Laser Plasma Accelerator (CLAPA) are measured and interpreted. The statistical results confirm that the intensities of the EMPs are closely related to both target material and thickness. The signal of the titanium target is more abundant than that of the copper target with the same thickness, and the intensity of EMP is positively correlated with the target thickness for aluminium foil. With the boosted EMP radiations, the energy of accelerated protons is also simultaneously enhanced. In addition, EMPs emitted from the front of the target exceed those from the rear, which are also pertinent to the specific target position. The resonant waveforms in the target chamber are analyzed using the fast Fourier transform, and the local resonance and the attenuation lead to changes of the frequency spectra of EMPs with variation of detecting positions, which is well supported by the modeling results. The findings are beneficial to gaining insight into the mechanism of EMP propagation in a typical target chamber and providing more information for EMP shielding design.

Key words: laser driven proton accleration, electromagnetic pulses, laser, target

中图分类号:  (Electromagnetic (nonlaser) radiation interactions with plasma)

  • 52.40.Db
41.75.Jv (Laser-driven acceleration?) 33.20.Xx (Spectra induced by strong-field or attosecond laser irradiation) 42.25.Bs (Wave propagation, transmission and absorption)