ArticleScientific reports2019
Coherence and pulse duration characterization of the PAL-XFEL in the hard X-ray regime.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Temporal pulse shaping aspects of refractive X-ray lenses.Journal of synchrotron radiation · 2026Article
- Bayesian electron density determination from sparse and noisy single-molecule X-ray scattering images.Science advances · 2024Article
- Resonant X-ray emission spectroscopy using self-seeded hard X-ray pulses at PAL-XFEL.Journal of synchrotron radiation · 2023Article
- Single-pulse characterization of the focal spot size of X-ray free-electron lasers using coherent diffraction imaging.Journal of synchrotron radiation · 2023Article
- Statistical analysis of hard X-ray radiation at the PAL-XFEL facility performed by Hanbury Brown and Twiss interferometry.Journal of synchrotron radiation · 2022Article
- Development of an experimental apparatus to observe ultrafast phenomena by tender X-ray absorption spectroscopy at PAL-XFEL.Journal of synchrotron radiation · 2022Article
- High spatial coherence and short pulse duration revealed by the Hanbury Brown and Twiss interferometry at the European XFEL.Structural dynamics (Melville, N.Y.) · 2021Article
- Emergence of anomalous dynamics in soft matter probed at the European XFEL.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
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Authors and funding
14 authors.
Funding
Abstract
We characterize the spatial and temporal coherence properties of hard X-ray pulses from the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL, Pohang, Korea). The measurement of the single-shot speckle contrast, together with the introduction of corrections considering experimental conditions, allows obtaining an intrinsic degree of transverse coherence of 0.85 ± 0.06. In the Self-Amplified Spontaneous Emission regime, the analysis of the intensity distribution of X-ray pulses also provides an estimate for the number of longitudinal modes. For monochromatic and pink (i.e. natural bandwidth provided by the first harmonic of the undulator) beams, we observe that the number of temporal modes is 6.0 ± 0.4 and 90.0 ± 7.2, respectively. Assuming a coherence time of 2.06 fs and 0.14 fs for the monochromatic and pink beam respectively, we estimate an average X-ray pulse duration of 12.6 ± 1.0 fs.
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