AI Article Synopsis
- The authors present a new method using a beam-splitting technique to monitor x-ray free-electron lasers (XFELs) under low-invasiveness conditions.
- They employ a transmission grating to create multiple x-ray beam branches, using one for spectral measurement and another for timing diagnostics with optical laser pulses.
- Their experiments demonstrated that this timing-monitoring method is highly accurate, achieving an error as low as 7.0 femtoseconds, showcasing its potential to improve XFEL experiments.
Article Abstract
We report a method for achieving advanced photon diagnostics of x-ray free-electron lasers (XFELs) under a quasi-noninvasive condition by using a beam-splitting scheme. Here, we used a transmission grating to generate multiple branches of x-ray beams. One of the two primary diffracted branches (+1st-order) is utilized for spectral measurement in a dispersive scheme, while the other (-1st-order) is dedicated for arrival timing diagnostics between the XFEL and the optical laser pulses. The transmitted x-ray beam (0th-order) is guided to an experimental station. To confirm the validity of this timing-monitoring scheme, we measured the correlation between the arrival timings of the -1st and 0th branches. The observed error was as small as 7.0 fs in root-mean-square. Our result showed the applicability of the beam branching scheme to advanced photon diagnostics, which will further enhance experimental capabilities of XFEL.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4733081 | PMC |
| http://dx.doi.org/10.1063/1.4939655 | DOI Listing |
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