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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.01784 |
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| _version_ | 1866912998241599488 |
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| author | Rodriguez-Fernandez, Angel Karpov, Dmitry Leake, Steven Carbone, Dina Diaz, Ana |
| author_facet | Rodriguez-Fernandez, Angel Karpov, Dmitry Leake, Steven Carbone, Dina Diaz, Ana |
| contents | Multiple x-ray beams generated by interference processes in perfect crystals were imaged with a resolution of about 100nm using tele-ptychography in the diffraction direction. These multiple wave-fields, also known as x-ray diffraction echoes, are related to the process known as the Pendelloesung effect and are described by dynamical diffraction theory. The echoes are produced by the constructive interference of diffracted x-rays at the exit surface of the crystal sample. In the imaged diffraction peak, we observed 10 echoes maxima with a total signal length of 78 um. Which translates into a total temporal delay in the signal of less than 108 fs.This makes the echoes of high importance for x-ray optics at x-ray Free Electron Laser sources, as the effect could be used for future ultrafast x-ray beam splitters. In addition to this application, echoes can be exploited to follow ultrafast processes in single crystal micro-structures such as melting or strain propagation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_01784 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Understanding ultrafast x-ray 'echoes' diffracted from single crystals Rodriguez-Fernandez, Angel Karpov, Dmitry Leake, Steven Carbone, Dina Diaz, Ana Materials Science Optics Multiple x-ray beams generated by interference processes in perfect crystals were imaged with a resolution of about 100nm using tele-ptychography in the diffraction direction. These multiple wave-fields, also known as x-ray diffraction echoes, are related to the process known as the Pendelloesung effect and are described by dynamical diffraction theory. The echoes are produced by the constructive interference of diffracted x-rays at the exit surface of the crystal sample. In the imaged diffraction peak, we observed 10 echoes maxima with a total signal length of 78 um. Which translates into a total temporal delay in the signal of less than 108 fs.This makes the echoes of high importance for x-ray optics at x-ray Free Electron Laser sources, as the effect could be used for future ultrafast x-ray beam splitters. In addition to this application, echoes can be exploited to follow ultrafast processes in single crystal micro-structures such as melting or strain propagation. |
| title | Understanding ultrafast x-ray 'echoes' diffracted from single crystals |
| topic | Materials Science Optics |
| url | https://arxiv.org/abs/2604.01784 |