Experimental study of electromagnetic pulse generation induced by laser interaction with solid targets on the Shenguang II upgrade facility

He Feihang; Li Weiren; Dong Yufeng; Zhang Chenglong; Wang Kengqi; Zhang Zhe; Xu Miaohua

doi:10.11884/HPLPB202638.250352

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He Feihang, Li Weiren, Dong Yufeng, et al. Experimental study of electromagnetic pulse generation induced by laser interaction with solid targets on the Shenguang II upgrade facility[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250352

Citation:

He Feihang, Li Weiren, Dong Yufeng, et al. Experimental study of electromagnetic pulse generation induced by laser interaction with solid targets on the Shenguang II upgrade facility[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250352

Citation:

He Feihang, Li Weiren, Dong Yufeng, et al. Experimental study of electromagnetic pulse generation induced by laser interaction with solid targets on the Shenguang II upgrade facility[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250352

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Experimental study of electromagnetic pulse generation induced by laser interaction with solid targets on the Shenguang II upgrade facility

doi: 10.11884/HPLPB202638.250352

He Feihang^{1, 2
,},
Li Weiren^{1, 2},
Dong Yufeng²,
Zhang Chenglong²,
Wang Kengqi^{3, 4},
Zhang Zhe^{2
,
,},
Xu Miaohua^{1
,
,}

1.
Department of Physics, China University of Mining and Technology (Beijing), Beijing 100083, China
2.
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3.
Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
4.
IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China

Received Date: 2025-10-17
Accepted Date: 2026-01-08
Rev Recd Date: 2026-01-19

Available Online: 2026-02-03

Abstract

Abstract

Background
Electromagnetic pulses generated in high-power laser–solid interactions can cause serious electromagnetic interference and threaten diagnostic systems, making their mechanism study essential.
Purpose
This work aims to investigate the characteristics and generation mechanisms of electromagnetic pulses induced by picosecond and nanosecond laser irradiation on solid targets.
Methods
Experiments were carried out on the Shenguang II Upgrade laser facility. The temporal waveforms and frequency spectra of the emitted electromagnetic fields were measured under various pulse durations, laser energies, and irradiation geometries.
Results
For picosecond laser irradiation, the electromagnetic pulses mainly originated from the neutralization current flowing through the target mount, and the peak electric field increased nearly linearly with laser energy. In the nanosecond experiments, the electromagnetic pulse intensity was lower, with the electric field oscillation decaying rapidly and a quasi-DC component observed. Using only the upper eight nanosecond beams produced stronger pulses than sixteen-beam irradiation, showing a modulation. In the combined picosecond and nanosecond laser experiment, the electromagnetic pulse peak generated by the picosecond laser was significantly reduced, which is attributed to the large-scale plasma formed by the nanosecond laser.
Conclusions
These findings clarify the generation behavior of electromagnetic pulses and provide references for mitigating electromagnetic interference in high-power laser experiments.
- Shenguang II Upgrade facility,
- laser–target interaction,
- electromagnetic pulse,
- neutralization current

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References(25)

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