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Title: Accurate prediction of X-ray pulse properties from a free-electron laser using machine learning

Journal Article · · Nature Communications
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  1. Imperial College, London (United Kingdom). Dept. of Physics
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE); European X-ray Free-Electron Laser (XFEL), Schenefeld (Germany)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
  4. European X-ray Free-Electron Laser (XFEL), Schenefeld (Germany)
  5. Uppsala Univ. (Sweden). Dept. of Physics and Astronomy
  6. Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS); Argonne National Lab. (ANL), Argonne, IL (United States)
  8. Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette (France)
  9. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  10. SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE); Stanford Univ., CA (United States). Dept. of Physics
  11. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS); California Lutheran Univ., Thousand Oaks, CA (United States). Dept. of Physics
  12. SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE)
  13. Univ. of Gothenburg (Sweden). Dept. of Physics
  14. Tohoku Univ., Sendai (Japan). Inst. of Multidisciplinary Research for Advanced Materials
  15. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. Kassel (Germany). Inst. for Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT)
  16. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS); Technische Univ. of Munich (Germany). Dept. of Physics
  17. Univ. Kassel (Germany). Inst. for Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT)
  18. SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE); Univ. of Gothenburg (Sweden). Dept. of Physics
  19. Lund Univ. (Sweden). MAX IV Lab.

Free-electron lasers providing ultra-short high-brightness pulses of X-ray radiation have great potential for a wide impact on science, and are a critical element for unravelling the structural dynamics of matter. To fully harness this potential, we must accurately know the X-ray properties: intensity, spectrum and temporal profile. Owing to the inherent fluctuations in free-electron lasers, this mandates a full characterization of the properties for each and every pulse. While diagnostics of these properties exist, they are often invasive and many cannot operate at a high-repetition rate. Here, we present a technique for circumventing this limitation. Employing a machine learning strategy, we can accurately predict X-ray properties for every shot using only parameters that are easily recorded at high-repetition rate, by training a model on a small set of fully diagnosed pulses. Lastly, this opens the door to fully realizing the promise of next-generation high-repetition rate X-ray lasers.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Engineering and Physical Sciences Research Council (EPSRC); European Research Council (ERC)
Grant/Contract Number:
AC02-76SF00515; SC0012376; EP/I032517/1
OSTI ID:
1369405
Journal Information:
Nature Communications, Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 59 works
Citation information provided by
Web of Science

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Cited By (10)

Attosecond time–energy structure of X-ray free-electron laser pulses journal March 2018
X-ray Raman scattering: a building block for nonlinear spectroscopy journal April 2019
Development of ultrafast capabilities for X-ray free-electron lasers at the linac coherent light source
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  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145 https://doi.org/10.1098/rsta.2018.0386
journal April 2019
xcalib : a focal spot calibrator for intense X-ray free-electron laser pulses based on the charge state distributions of light atoms journal May 2019
Machine learning-based pulse characterization in figure-eight mode-locked lasers journal January 2019
THz streak camera performance for single-shot characterization of XUV pulses with complex temporal structures text January 2020
Ultrashort Free-Electron Laser X-ray Pulses journal September 2017
Ultrashort Free-Electron Laser X-ray Pulses text January 2017
xcalib : a focal spot calibrator for intense X-ray free-electron laser pulses based on the charge state distributions of light atoms text January 2019
Attosecond time–energy structure of X-ray free-electron laser pulses text January 2018

Figures / Tables (6)