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  • Seiboth, F., et al. (author)
  • Focusing XFEL SASE pulses by rotationally parabolic refractive x-ray lenses
  • 2014
  • In: Journal of Physics, Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596. ; 499:1, s. 012004-
  • Journal article (peer-reviewed)abstract
    • Using rotationally parabolic refractive x-ray lenses made of beryllium, we focus hard x-ray free-electron laser pulses of the Linac Coherent Light Source (LCLS) down to a spot size in the 100 nm range. We demonstrated efficient nanofocusing and characterized the nanofocused wave field by ptychographic imaging [A. Schropp, et al., Sci. Rep. 3, 1633 (2013)] in the case of monochromatic LCLS pulses produced by a crystal monochromator that decreases the LCLS bandwidth down to ΔE/E 1.4 · 10-4. The full spectrum of LCLS pulses generated by self-amplified spontaneous emission (SASE), however, fluctuates and has a typical bandwidth of a few per mille (ΔE/E 2 · 10-3). Due to the dispersion in the lens material, a polychromatic nanobeam generated by refractive x-ray lenses is affected by chromatic aberration. After reviewing the chromaticity of refractive x-ray lenses, we discuss the influence of increased bandwidth on the quality of a nanofocused SASE pulse.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Nilsson, Daniel (1)
Vogt, Ulrich (1)
Nagler, B. (1)
Hoppe, R (1)
Hertz, Hans M. (1)
Hastings, J B (1)
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Zastrau, U. (1)
Lee, H. J. (1)
Seiboth, F. (1)
Schroer, C. G. (1)
Arnold, B. (1)
Schropp, A. (1)
Meier, V. (1)
Patommel, J. (1)
Galtier, E. C. (1)
Uhlén, Fredrik (1)
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University
Royal Institute of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2014 (1)Undo refine

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