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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2506.23548 |
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| _version_ | 1866908428089163776 |
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| author | Ogura, K. Pirozhkova, M. S. Sagisaka, A. Esirkepov, T. Zh. Faenov, A. Ya. Pikuz, T. A. Kotaki, H. Hayashi, Y. Fukuda, Y. Koga, J. K. Bulanov, S. V. Daido, H. Hasegawa, N. Ishino, M. Nishikino, M. Koike, M. Kawachi, T. Kiriyama, H. Kando, M. Neely, D. Pirozhkov, A. S. |
| author_facet | Ogura, K. Pirozhkova, M. S. Sagisaka, A. Esirkepov, T. Zh. Faenov, A. Ya. Pikuz, T. A. Kotaki, H. Hayashi, Y. Fukuda, Y. Koga, J. K. Bulanov, S. V. Daido, H. Hasegawa, N. Ishino, M. Nishikino, M. Koike, M. Kawachi, T. Kiriyama, H. Kando, M. Neely, D. Pirozhkov, A. S. |
| contents | Burst Intensification by Singularity Emitting Radiation (BISER) in underdense relativistic laser plasma is a bright source of coherent extreme ultraviolet (XUV) and x-ray radiation. In contrast to all harmonic generation mechanisms, high-resolution experimental BISER spectra in the XUV region contain spectral fringes with separation much finer (down to 0.12 eV) than the initial driving laser frequency (~1.5 eV). We show that these fringe separations result from two main factors: laser frequency downshift (redshift) due to the quasi-adiabatic energy loss to the plasma waves, and spectral interference of different harmonic orders from different emission moments, i.e. alloharmonics [Pirozhkova et al., arXiv:2306.01018] |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_23548 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Alloharmonics in Burst Intensification by Singularity Emitting Radiation Ogura, K. Pirozhkova, M. S. Sagisaka, A. Esirkepov, T. Zh. Faenov, A. Ya. Pikuz, T. A. Kotaki, H. Hayashi, Y. Fukuda, Y. Koga, J. K. Bulanov, S. V. Daido, H. Hasegawa, N. Ishino, M. Nishikino, M. Koike, M. Kawachi, T. Kiriyama, H. Kando, M. Neely, D. Pirozhkov, A. S. Plasma Physics Burst Intensification by Singularity Emitting Radiation (BISER) in underdense relativistic laser plasma is a bright source of coherent extreme ultraviolet (XUV) and x-ray radiation. In contrast to all harmonic generation mechanisms, high-resolution experimental BISER spectra in the XUV region contain spectral fringes with separation much finer (down to 0.12 eV) than the initial driving laser frequency (~1.5 eV). We show that these fringe separations result from two main factors: laser frequency downshift (redshift) due to the quasi-adiabatic energy loss to the plasma waves, and spectral interference of different harmonic orders from different emission moments, i.e. alloharmonics [Pirozhkova et al., arXiv:2306.01018] |
| title | Alloharmonics in Burst Intensification by Singularity Emitting Radiation |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2506.23548 |