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Title: Polarization control in an X-ray free-electron laser

Journal Article · · Nature Photonics
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  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); European XFEL GmbH, Hamburg (Germany)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Gothenburg, Gothenburg (Sweden)
  4. European XFEL GmbH, Hamburg (Germany)
  5. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Bern, Bern (Switzerland)

X-ray free-electron lasers are unique sources of high-brightness coherent radiation. However, existing devices supply only linearly polarized light, precluding studies of chiral dynamics. A device called the Delta undulator has been installed at the Linac Coherent Light Source (LCLS) to provide tunable polarization. With a reverse tapered planar undulator line to pre-microbunch the beam and the novel technique of beam diverting, hundreds of microjoules of circularly polarized X-ray pulses are produced at 500–1,200 eV. These X-ray pulses are tens of femtoseconds long, have a degree of circular polarization of 0.98–0.04+0.02 at 707 eV and may be scanned in energy. We also present a new two-colour X-ray pump–X-ray probe operating mode for the LCLS. As a result, energy differences of ΔE/E = 2.4% are supported, and the second pulse can be adjusted to any elliptical polarization. In this mode, the pointing, timing, intensity and wavelength of the two pulses can be modified.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1332904
Report Number(s):
SLAC-PUB-16827
Journal Information:
Nature Photonics, Vol. 10, Issue 7; ISSN 1749-4885
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 97 works
Citation information provided by
Web of Science

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Cited By (47)

Review of fully coherent free-electron lasers journal September 2018
Accurate prediction of X-ray pulse properties from a free-electron laser using machine learning journal June 2017
Three-dimensional nanomagnetism journal June 2017
Fresh-slice multicolour X-ray free-electron lasers journal October 2016
Evidence of depolarization and ellipticity of high harmonics driven by ultrashort bichromatic circularly polarized fields journal November 2018
Femtosecond X-ray induced changes of the electronic and magnetic response of solids from electron redistribution journal November 2019
Attosecond time–energy structure of X-ray free-electron laser pulses journal March 2018
Polarization control of isolated high-harmonic pulses journal April 2018
Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser journal March 2016
Circular dichroism measurements at an x-ray free-electron laser with polarization control journal August 2016
Perspective: Opportunities for ultrafast science at SwissFEL journal November 2017
Progress report on the XUV online diagnostic unit for the highly accurate determination of SR properties
  • Buck, Jens; Bagschik, Kai; Glaser, Leif
  • PROCEEDINGS OF THE 13TH INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION – SRI2018, AIP Conference Proceedings https://doi.org/10.1063/1.5084688
conference January 2019
Vortices in multiphoton pair production by two-color rotating laser fields journal December 2018
Ultrafast magnetodynamics with free-electron lasers journal January 2018
Recent advances in ultrafast X-ray sources
  • Schoenlein, Robert; Elsaesser, Thomas; Holldack, Karsten
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145 https://doi.org/10.1098/rsta.2018.0384
journal April 2019
Off-resonance-enhanced polarization control in two-color atomic ionization journal January 2020
Emitter-site-selective photoelectron circular dichroism of trifluoromethyloxirane journal May 2017
Photoelectron distribution of nonresonant two-photon ionization of neutral atoms journal July 2017
Matching-based fresh-slice method for generating two-color x-ray free-electron lasers journal September 2017
Generation of coherent two-color pulses at two adjacent harmonics in a seeded free-electron laser journal February 2018
Few-femtosecond electron beam with terahertz-frequency wakefield-driven compression journal August 2018
Method for polarization shaping at free-electron lasers journal November 2019
High-Power Femtosecond Soft X Rays from Fresh-Slice Multistage Free-Electron Lasers journal June 2018
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Control of the Lasing Slice by Transverse Mismatch in an X-Ray Free-Electron Laser journal August 2018
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Short-wavelength free-electron laser sources and science: a review text January 2017
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Measurement of the Resonant Magneto-Optical Kerr Effect Using a Free Electron Laser journal June 2017
Generating circularly polarized radiation in the extreme ultraviolet spectral range at the free-electron laser FLASH text January 2017
Three-dimensional nanomagnetism text January 2017
Circular dichroism measurements at an x-ray free-electron laser with polarization control text January 2016
Accurate prediction of X-ray pulse properties from a free-electron laser using machine learning text January 2017
Operation of X-ray gas monitors at the European XFEL text January 2019
Perspective: Opportunities for ultrafast science at SwissFEL text January 2017
Generating circularly polarized radiation in the extreme ultraviolet spectral range at the free-electron laser FLASH journal May 2017
Progress report on the XUV online diagnostic unit for the highly accurate determination of SR properties text January 2019
Perspective: Opportunities for ultrafast science at SwissFEL text January 2017
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