High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasers
Cavity-based X-ray free-electron lasers (CBXFELs) represent a possible realization of fully coherent hard X-ray sources having high spectral brilliance along with a narrow spectral bandwidth of ∼1–50 meV, a high repetition pulse rate of ∼1 MHz, and good stability. A diagnostic tool is required to me...
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| Format: | Article |
| Language: | English |
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International Union of Crystallography
2025-07-01
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| Series: | Journal of Synchrotron Radiation |
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| Online Access: | https://journals.iucr.org/paper?S1600577525004278 |
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| author | Keshab Kauchha Peifan Liu Paresh Pradhan Yuri Shvyd'ko |
| author_facet | Keshab Kauchha Peifan Liu Paresh Pradhan Yuri Shvyd'ko |
| author_sort | Keshab Kauchha |
| collection | DOAJ |
| description | Cavity-based X-ray free-electron lasers (CBXFELs) represent a possible realization of fully coherent hard X-ray sources having high spectral brilliance along with a narrow spectral bandwidth of ∼1–50 meV, a high repetition pulse rate of ∼1 MHz, and good stability. A diagnostic tool is required to measure CBXFEL spectra with meV resolution and high luminosity on a shot-to-shot basis. We have designed a high-luminosity single-shot hard X-ray spectrograph that images 9.831 keV X-rays in a ∼200 meV spectral window with a spectral resolution of a few meV. The spectrograph is designed around angular dispersion of X-rays in Bragg diffraction from crystals. It operates close to design specifications, exhibiting a linear dispersion rate of ∼1.4 µm meV−1 and a ∼200 meV window of high-fidelity spectral imaging. The experimentally demonstrated spectral resolution is ∼20 meV; this resolution is twice as low as expected from theory primarily because the spectrograph is highly sensitive to crystal angular instabilities. The experiment was performed at the bending magnet X-ray optics testing beamline 1-BM at the Advanced Photon Source. |
| format | Article |
| id | doaj-art-e0453ee3317e4dbcb1daafa7fee75484 |
| institution | Kabale University |
| issn | 1600-5775 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | International Union of Crystallography |
| record_format | Article |
| series | Journal of Synchrotron Radiation |
| spelling | doaj-art-e0453ee3317e4dbcb1daafa7fee754842025-08-20T03:28:04ZengInternational Union of CrystallographyJournal of Synchrotron Radiation1600-57752025-07-0132486187210.1107/S1600577525004278yi5175High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasersKeshab Kauchha0Peifan Liu1Paresh Pradhan2Yuri Shvyd'ko3Argonne National Laboratory, Lemont, IL 60439, USAArgonne National Laboratory, Lemont, IL 60439, USAArgonne National Laboratory, Lemont, IL 60439, USAArgonne National Laboratory, Lemont, IL 60439, USACavity-based X-ray free-electron lasers (CBXFELs) represent a possible realization of fully coherent hard X-ray sources having high spectral brilliance along with a narrow spectral bandwidth of ∼1–50 meV, a high repetition pulse rate of ∼1 MHz, and good stability. A diagnostic tool is required to measure CBXFEL spectra with meV resolution and high luminosity on a shot-to-shot basis. We have designed a high-luminosity single-shot hard X-ray spectrograph that images 9.831 keV X-rays in a ∼200 meV spectral window with a spectral resolution of a few meV. The spectrograph is designed around angular dispersion of X-rays in Bragg diffraction from crystals. It operates close to design specifications, exhibiting a linear dispersion rate of ∼1.4 µm meV−1 and a ∼200 meV window of high-fidelity spectral imaging. The experimentally demonstrated spectral resolution is ∼20 meV; this resolution is twice as low as expected from theory primarily because the spectrograph is highly sensitive to crystal angular instabilities. The experiment was performed at the bending magnet X-ray optics testing beamline 1-BM at the Advanced Photon Source.https://journals.iucr.org/paper?S1600577525004278x-raysbragg diffractionangular dispersionspectrographcavity-based xfels |
| spellingShingle | Keshab Kauchha Peifan Liu Paresh Pradhan Yuri Shvyd'ko High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasers Journal of Synchrotron Radiation x-rays bragg diffraction angular dispersion spectrograph cavity-based xfels |
| title | High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasers |
| title_full | High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasers |
| title_fullStr | High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasers |
| title_full_unstemmed | High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasers |
| title_short | High-luminosity meV-resolution single-shot hard X-ray spectrograph for cavity-based X-ray free-electron lasers |
| title_sort | high luminosity mev resolution single shot hard x ray spectrograph for cavity based x ray free electron lasers |
| topic | x-rays bragg diffraction angular dispersion spectrograph cavity-based xfels |
| url | https://journals.iucr.org/paper?S1600577525004278 |
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