Observation of Ion-wave Satellites to Laser Harmonics in Intense Picosecond Laser-Solid Interaction
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908623217623040 |
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| author | Marjoribanks, R. S. Zhao, L. Budnik, F. W. Kulcsar, G. Wagner, R. Umstadter, D. Drake, R. P. Downer, M. C. |
| author_facet | Marjoribanks, R. S. Zhao, L. Budnik, F. W. Kulcsar, G. Wagner, R. Umstadter, D. Drake, R. P. Downer, M. C. |
| contents | Detailed spectra of harmonics produced from ultra-intense, sub-picosecond, high-contrast laser pulses incident on solid targets have shown the first observation of regular red- and blue-shifted satellites. Their frequency shift is slightly less than the frequency of a nominal, pure ion-plasma wave associated with electron critical density, where an ion-acoustic wave would be expected. We explain this as the result of a substantial reduction of Debye shielding as the intense optical fields compete to drive electrons in large-amplitude oscillations. This general effect leads to a larger, dynamical and anisotropic Debye length, which should have a broad impact on plasma physics in this regime. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_00174 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observation of Ion-wave Satellites to Laser Harmonics in Intense Picosecond Laser-Solid Interaction Marjoribanks, R. S. Zhao, L. Budnik, F. W. Kulcsar, G. Wagner, R. Umstadter, D. Drake, R. P. Downer, M. C. Plasma Physics Optics Detailed spectra of harmonics produced from ultra-intense, sub-picosecond, high-contrast laser pulses incident on solid targets have shown the first observation of regular red- and blue-shifted satellites. Their frequency shift is slightly less than the frequency of a nominal, pure ion-plasma wave associated with electron critical density, where an ion-acoustic wave would be expected. We explain this as the result of a substantial reduction of Debye shielding as the intense optical fields compete to drive electrons in large-amplitude oscillations. This general effect leads to a larger, dynamical and anisotropic Debye length, which should have a broad impact on plasma physics in this regime. |
| title | Observation of Ion-wave Satellites to Laser Harmonics in Intense Picosecond Laser-Solid Interaction |
| topic | Plasma Physics Optics |
| url | https://arxiv.org/abs/2511.00174 |