# Eur.XFEL

 2019-11-1115:59 [PUBDB-2019-04122] Journal Article et al Characterizing transmissive diamond gratings as beam splitters for the hard X-ray single-shot spectrometer of the European XFEL Journal of synchrotron radiation 26(3), 708 - 713 (2019) [10.1107/S1600577519003382]   The European X-ray Free Electron Laser (EuXFEL) offers intense, coherent femtosecond pulses, resulting in characteristic peak brilliance values a billion times higher than that of conventional synchrotron facilities. Such pulses result in extreme peak radiation levels of the order of terawatts cm−2 for any optical component in the beam and can exceed the ablation threshold of many materials. [...] 2019-10-3015:11 [PUBDB-2019-03837] Contribution to a conference proceedings et al Harmonic Lasing Experiment at the European XFEL 39th International Free-Electron Laser Conference, FEL19, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 2019 000-000 (2019) Harmonic lasing is an opportunity to extend the photon energy range of existing and planned X-ray FELuser facilities. Contrary to nonlinear harmonic generation, harmonic lasing can provide a much more intense,stable, and narrow-band FEL beam. [...] 2019-10-1611:49 [PUBDB-2019-03689] Journal Article et al Revealing misfit dislocations in $InAs_{x}P_{1− x}-InP$ core–shell nanowires by x-ray diffraction Nanotechnology 30(50), 505703 (2019) [10.1088/1361-6528/ab40f1]   InAs x P1−x nanowires are promising building blocks for future optoelectronic devices and nanoelectronics. Their structure may vary from nanowire to nanowire, which may influence their average optoelectronic properties. [...] OpenAccess: PDF PDF (PDFA); 2019-10-1416:25 [PUBDB-2019-03673] Contribution to a conference proceedings et al Absorbed Radiation Doses on the European XFEL Undulator Systems During Early User Experiments 39th International Free Electron Laser Conference, FEL19, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 2019 5 pp. (2019) The European XFEL GmbH (EuXFEL) is a FEL userfacility based on a superconducting accelerator with highduty cycle. Three movable gap SASE Undulator Systems using hybrid NdFeB permanent magnet segments are in operation. [...] Restricted: PDF PDF (PDFA); External link: Fulltext 2019-10-1112:36 [PUBDB-2019-03654] Contribution to a conference proceedings Smirnov, P. A. First Tests Using Sipm Based Beam Loss Monitors at the European XFEL 8th International Beam Instrumentation Conference, IBIC2019, MalmöMalmö, Sweden, 8 Sep 2019 - 12 Sep 2019 JACoW Publishing, Geneva, Switzerland 4 pp. (2019) The European XFEL uTCA based Beam Loss Monitor System (BLM) is composed of about 470 monitors using photomultiplier tubes (PMTs). BLMs installed in the SASE undulator intersections show high signals at electron energy higher 16 GeV or photon energy higher14 keV due to background synchrotron radiation which directly affects the PMT. [...] Restricted: PDF PDF (PDFA); External link: Fulltext 2019-07-1210:44 [PUBDB-2019-02698] Journal Article et al Evidence of Extreme Ultraviolet Superfluorescence in Xenon Physical review letters 123(2), 023201 (2019) [10.1103/PhysRevLett.123.023201]   We present a comprehensive experimental and theoretical study on superfluorescence in the extreme ultraviolet wavelength regime. Focusing a free-electron laser pulse in a cell filled with Xe gas, the medium is quasi-instantaneously population inverted by 4d-shell ionization on the giant resonance followed by Auger decay [...] OpenAccess: PDF PDF (PDFA); 2019-06-2911:40 [PUBDB-2019-02611] Journal Article et al New dynamic diamond anvil cells for tera-pascal per second fast compression x-ray diffraction experiments Review of scientific instruments 90(6), 065114 (2019) [10.1063/1.5098993]   Fast compression experiments performed using dynamic diamond anvil cells (dDACs) employing piezoactuators offer the opportunity to study compression-rate dependent phenomena. In this paper, we describe an experimental setup which allows us to perform time-resolved x-ray diffraction during the fast compression of materials using improved dDACs. [...] Published on 2019-06-21. Available in OpenAccess from 2020-06-21.: PDF PDF (PDFA); 2019-06-2110:30 [PUBDB-2019-02527] Journal Article et al Two-color XUV+NIR femtosecond photoionization of neon in the near-threshold region New journal of physics 21(6), 063034 (2019) [10.1088/1367-2630/ab2a98]   Results of angle-resolved electron spectroscopy of near-threshold photoionization of Ne atoms bycombined femtosecond extreme ultraviolet and near infraredfields are presented. The dressed-electron spectra show an energetic distribution into so-called sidebands, being separated by thephoton energy of the dressing laser [...] OpenAccess: PDF PDF (PDFA); 2019-05-1616:20 [PUBDB-2019-02299] Journal Article/Report Tomin, S. Accelerator Beam Dynamics at the European X-Ray Free Electron Laser [DESY-18-178]   We consider the collective beam dynamics in the accelerator of the European X-ray Free Electron Laser for electron bunches with charges of 250 and 500 pC. The dynamics has been studied numerically with different computer programs, and we struggle to include properly the whole beam physics with collective effects. [...] OpenAccess: PDF PDF (PDFA); 2019-05-0809:15 [PUBDB-2019-02178] Journal Article et al Photon diagnostics at the FLASH THz beamline Journal of synchrotron radiation 26(3), 700 - 707 (2019) [10.1107/S1600577519003412]   The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts and naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along with the auxiliary NIR and VIS ultrashort lasers, supports a plethora of dynamic investigations in physics, material science and biology. [...] OpenAccess: PDF PDF (PDFA);