Spatiotemporal response of crystals in x-ray Bragg diffraction
The spatiotemporal response of crystals in x-ray Bragg diffraction resulting from excitation by an ultrashort, laterally confined x-ray pulse is studied theoretically. The theory presents an extension of the analysis in symmetric reflection geometry [R. R. Lindberg and Y. V. Shvyd’ko, Phys. Rev. ST...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2012-10-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.15.100702 |
| _version_ | 1828857953825849344 |
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| author | Yuri Shvyd’ko Ryan Lindberg |
| author_facet | Yuri Shvyd’ko Ryan Lindberg |
| author_sort | Yuri Shvyd’ko |
| collection | DOAJ |
| description | The spatiotemporal response of crystals in x-ray Bragg diffraction resulting from excitation by an ultrashort, laterally confined x-ray pulse is studied theoretically. The theory presents an extension of the analysis in symmetric reflection geometry [R. R. Lindberg and Y. V. Shvyd’ko, Phys. Rev. ST Accel. Beams 15, 050706 (2012)PRABFM1098-440210.1103/PhysRevSTAB.15.050706] to the generic case, which includes Bragg diffraction both in reflection (Bragg) and transmission (Laue) asymmetric scattering geometries. The spatiotemporal response is presented as a product of a crystal-intrinsic plane-wave spatiotemporal response function and an envelope function defined by the crystal-independent transverse profile of the incident beam and the scattering geometry. The diffracted wave fields exhibit amplitude modulation perpendicular to the propagation direction due to both angular dispersion and the dispersion due to Bragg’s law. The characteristic measure of the spatiotemporal response is expressed in terms of a few parameters: the extinction length, crystal thickness, Bragg angle, asymmetry angle, and the speed of light. Applications to self-seeding of hard x-ray free-electron lasers are discussed, with particular emphasis on the relative advantages of using either the Bragg or Laue scattering geometries. Intensity front inclination in asymmetric diffraction can be used to make snapshots of ultrafast processes with femtosecond resolution. |
| first_indexed | 2024-12-13T01:47:01Z |
| format | Article |
| id | doaj.art-fcd82457b60243cf896744f9585fa997 |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-12-13T01:47:01Z |
| publishDate | 2012-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-fcd82457b60243cf896744f9585fa9972022-12-22T00:03:37ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022012-10-01151010070210.1103/PhysRevSTAB.15.100702Spatiotemporal response of crystals in x-ray Bragg diffractionYuri Shvyd’koRyan LindbergThe spatiotemporal response of crystals in x-ray Bragg diffraction resulting from excitation by an ultrashort, laterally confined x-ray pulse is studied theoretically. The theory presents an extension of the analysis in symmetric reflection geometry [R. R. Lindberg and Y. V. Shvyd’ko, Phys. Rev. ST Accel. Beams 15, 050706 (2012)PRABFM1098-440210.1103/PhysRevSTAB.15.050706] to the generic case, which includes Bragg diffraction both in reflection (Bragg) and transmission (Laue) asymmetric scattering geometries. The spatiotemporal response is presented as a product of a crystal-intrinsic plane-wave spatiotemporal response function and an envelope function defined by the crystal-independent transverse profile of the incident beam and the scattering geometry. The diffracted wave fields exhibit amplitude modulation perpendicular to the propagation direction due to both angular dispersion and the dispersion due to Bragg’s law. The characteristic measure of the spatiotemporal response is expressed in terms of a few parameters: the extinction length, crystal thickness, Bragg angle, asymmetry angle, and the speed of light. Applications to self-seeding of hard x-ray free-electron lasers are discussed, with particular emphasis on the relative advantages of using either the Bragg or Laue scattering geometries. Intensity front inclination in asymmetric diffraction can be used to make snapshots of ultrafast processes with femtosecond resolution.http://doi.org/10.1103/PhysRevSTAB.15.100702 |
| spellingShingle | Yuri Shvyd’ko Ryan Lindberg Spatiotemporal response of crystals in x-ray Bragg diffraction Physical Review Special Topics. Accelerators and Beams |
| title | Spatiotemporal response of crystals in x-ray Bragg diffraction |
| title_full | Spatiotemporal response of crystals in x-ray Bragg diffraction |
| title_fullStr | Spatiotemporal response of crystals in x-ray Bragg diffraction |
| title_full_unstemmed | Spatiotemporal response of crystals in x-ray Bragg diffraction |
| title_short | Spatiotemporal response of crystals in x-ray Bragg diffraction |
| title_sort | spatiotemporal response of crystals in x ray bragg diffraction |
| url | http://doi.org/10.1103/PhysRevSTAB.15.100702 |
| work_keys_str_mv | AT yurishvydko spatiotemporalresponseofcrystalsinxraybraggdiffraction AT ryanlindberg spatiotemporalresponseofcrystalsinxraybraggdiffraction |