AI Article Synopsis
- The advancement in delivering two X-ray pulses with precise time delays allows researchers to investigate ultra-fast processes in condensed matter systems using X-ray free electron lasers (FEL).
- Recent developments in hard X-ray optics have improved the ability to observe atomic-scale movements that previous techniques couldn't detect.
- Characterization of the X-ray beam shows that it maintains good coherence through the split-and-delay optics, with measurements indicating nearly perfect pulse qualities after transmission.
Article Abstract
The ability to deliver two coherent X-ray pulses with precise time-delays ranging from a few femtoseconds to nanoseconds enables critical capabilities of probing ultra-fast phenomena in condensed matter systems at X-ray free electron laser (FEL) sources. Recent progress made in the hard X-ray split-and-delay optics developments now brings a very promising prospect for resolving atomic-scale motions that were not accessible by previous time-resolved techniques. Here, we report on characterizing the spatial and temporal coherence properties of the hard X-ray FEL beam after propagating through split-and-delay optics. Speckle contrast analysis of small-angle scattering measurements from nanoparticles reveals well-preserved transverse coherence of the beam. Measuring intensity fluctuations from successive X-ray pulses also reveals that only single or double temporal modes remain in the transmitted beam, corresponding to nearly Fourier transform limited pulses.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7081363 | PMC |
| http://dx.doi.org/10.1038/s41598-020-61926-y | DOI Listing |
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