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<p>High-power laser pulses interacting with targets can generate intense electromagnetic pulses (EMPs), which can disrupt physical experimental diagnostics and even damage diagnostic equipment, posing a threat to the reliable operation of experiments. In this study, EMPs resulting from multi-petawatt laser irradiating nitrogen gas jets were systematically analyzed and investigated. The experimental results revealed that the EMP amplitude is positively correlated with the quantity and energy of the electrons captured and accelerated by the plasma channel. These factors are reflected by parameters such as laser energy and nitrogen gas jet pressure. Additionally, we propose several potential sources of EMPs produced by laser-irradiated gas jets and separately analyzed their spatiotemporal distributions. The findings provide insight into the mechanisms of EMP generation and introduce a new approach to achieve controllable EMPs by regulating the laser energy and gas jet pressure.</p>

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Generation and regulation of electromagnetic pulses induced by multi-petawatt laser coupling with gas jets

  • 期刊论文

  • 发表日期：

    2025年4月19日

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  • Qiang-You He,
  • Zi-Tao Wang,
  • Zhi-Gang Deng,
  • Jie Feng,
  • Ya-Dong Xia,
  • Xi-Chen Hu,
  • Ming-Yang Zhu,
  • Jia-Jie Xie,
  • Zong-Qiang Yuan,
  • Zhi-Meng Zhang,
  • Feng Lu,
  • Lei Yang,
  • Hao Cheng,
  • Yu-Ze Li,
  • Yang Yan,
  • Yan-Lv Fang,
  • Chen-Tong Li,
  • Wei-Min Zhou,
  • Ting-Shuai Li,
  • Li-Ming Chen,
  • Chen Lin,
  • Xue-Qing Yan

摘要

High-power laser pulses interacting with targets can generate intense electromagnetic pulses (EMPs), which can disrupt physical experimental diagnostics and even damage diagnostic equipment, posing a threat to the reliable operation of experiments. In this study, EMPs resulting from multi-petawatt laser irradiating nitrogen gas jets were systematically analyzed and investigated. The experimental results revealed that the EMP amplitude is positively correlated with the quantity and energy of the electrons captured and accelerated by the plasma channel. These factors are reflected by parameters such as laser energy and nitrogen gas jet pressure. Additionally, we propose several potential sources of EMPs produced by laser-irradiated gas jets and separately analyzed their spatiotemporal distributions. The findings provide insight into the mechanisms of EMP generation and introduce a new approach to achieve controllable EMPs by regulating the laser energy and gas jet pressure.