Coherence properties of the European XFEL

Geloni, Gianluca; Saldin, Evgeni; Samoylova, Liubov; Schneidmiller, Evgeni; Sinn, H.; Tschentscher, Th.; Yurkov, M.V.

doi:10.1088/1367-2630/12/3/035021

Cited by 108 publications

(79 citation statements)

References 24 publications

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“…In particular, the advantage of efficient Kirkpatrick-Baez mirror pre-focusing and of the dedicated instrumentation can be exploited for more challenging imaging experiments. The European free-electron laser currently under construction will provide pulses with a duration of smaller than 100 fs, containing 10 12 − 10 13 transversely coherent photons at wavelength down to 0.1 nm [102]. Here, the use of waveguide optics could possibly help to define the illumination wavefronts in a single pulse imaging experiment, which otherwise would suffer from the statistical fluctuations inherent in the so-called self-amplified stimulated emission (SASE) principle.…”

Section: Discussionmentioning

confidence: 99%

Optimization of waveguide optics for lensless x-ray imaging

Krüger¹

2011

Göttingen Series in X-Ray Physics

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Section: Discussionmentioning

confidence: 99%

Optimization of waveguide optics for lensless x-ray imaging

Krüger¹

2011

Göttingen Series in X-Ray Physics

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“…The new DLSR and FEL sources will provide 3-10 orders of magnitude higher brightness with much better coherence than the current generation of storage rings. 169 To gain the full benefits of these new light sources, the greatly increased photon flux needs to be preserved and an accurate control of the light pulses needs to be achieved to provide the desired spectral/temporal and polarization properties for the different applications.…”

Section: Prospectsmentioning

confidence: 99%

Spectral tailoring of nanoscale EUV and soft x-ray multilayer optics

Huang

Медведев

Kruijs

et al. 2017

Applied Physics Reviews

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Extreme ultraviolet and soft X-ray (XUV) multilayer optics have experienced significant development over the past few years, particularly on controlling the spectral characteristics of light for advanced applications like EUV photolithography, space observation, and accelerator- or lab-based XUV experiments. Both planar and three dimensional multilayer structures have been developed to tailor the spectral response in a wide wavelength range. For the planar multilayer optics, different layered schemes are explored. Stacks of periodic multilayers and capping layers are demonstrated to achieve multi-channel reflection or suppression of the reflective properties. Aperiodic multilayer structures enable broadband reflection both in angles and wavelengths, with the possibility of polarization control. The broad wavelength band multilayer is also used to shape attosecond pulses for the study of ultrafast phenomena. Narrowband multilayer monochromators are delivered to bridge the resolution gap between crystals and regular multilayers. High spectral purity multilayers with innovated anti-reflection structures are shown to select spectrally clean XUV radiation from broadband X-ray sources, especially the plasma sources for EUV lithography. Significant progress is also made in the three dimensional multilayer optics, i.e., combining micro- and nanostructures with multilayers, in order to provide new freedom to tune the spectral response. Several kinds of multilayer gratings, including multilayer coated gratings, sliced multilayer gratings, and lamellar multilayer gratings are being pursued for high resolution and high efficiency XUV spectrometers/monochromators, with their advantages and disadvantages, respectively. Multilayer diffraction optics are also developed for spectral purity enhancement. New structures like gratings, zone plates, and pyramids that obtain full suppression of the unwanted radiation and high XUV reflectance are reviewed. Based on the present achievement of the spectral tailoring multilayer optics, the remaining challenges and opportunities for future researches are discussed.

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“…A European X-ray Free-Electron Laser (X-FEL) is being commissioned in Germany [4]. In those facilities, synchrotron-like insertion devices of typically a few meters in length are expanded to lengths of several hundred meters and X-ray light is emitted coherently [5]. All these sources and facilities cover differences in brilliance of over 25 orders of magnitude-some of the largest ranges of magnitude found in modern technology!…”

Section: Facilities and Sourcesmentioning

confidence: 99%