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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2505.06865 |
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| _version_ | 1866908359784923136 |
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| author | Sun, Yanwen Li, Haoyuan Ichii, Yoshio Zhu, Diling |
| author_facet | Sun, Yanwen Li, Haoyuan Ichii, Yoshio Zhu, Diling |
| contents | We present a novel split-delay line design for generating hard x-ray attosecond pulse pulse pairs. The design introduces an unconventional delay adjustment mechanism, where an x-ray mirror pair rotation was used for adjusting the path length differential between two beam paths. The exit beam pointing stability is guaranteed by the mirror-pair self-compensating geometry, therefore enabling stable continuous delay adjustments. We present a parameter study for this concept covering 5-11 keV photon energies with high efficiency over a delay time coverage window of 20-femstosecond with sub-20 attosecond scanning resolution. Wavefront simulations incorporating realistic mirror parameters demonstrate that the system achieves high throughput and is capable of delivering high-peak-intensity pulses. Attosecond x-ray pump x-ray probe capability enabled by such a delay line is poised to unlock a wide range of hard x-ray nonlinear spectroscopy measurements at sub-femtosecond timescales for the first time. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_06865 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An ultrastable hard x-ray attosecond split-delay line Sun, Yanwen Li, Haoyuan Ichii, Yoshio Zhu, Diling Optics We present a novel split-delay line design for generating hard x-ray attosecond pulse pulse pairs. The design introduces an unconventional delay adjustment mechanism, where an x-ray mirror pair rotation was used for adjusting the path length differential between two beam paths. The exit beam pointing stability is guaranteed by the mirror-pair self-compensating geometry, therefore enabling stable continuous delay adjustments. We present a parameter study for this concept covering 5-11 keV photon energies with high efficiency over a delay time coverage window of 20-femstosecond with sub-20 attosecond scanning resolution. Wavefront simulations incorporating realistic mirror parameters demonstrate that the system achieves high throughput and is capable of delivering high-peak-intensity pulses. Attosecond x-ray pump x-ray probe capability enabled by such a delay line is poised to unlock a wide range of hard x-ray nonlinear spectroscopy measurements at sub-femtosecond timescales for the first time. |
| title | An ultrastable hard x-ray attosecond split-delay line |
| topic | Optics |
| url | https://arxiv.org/abs/2505.06865 |