# Eur.XFEL

 2017-11-0910:29 [PUBDB-2017-11802] Journal Article et al Single-shot nonlinear spectroscopy in the vacuum-ultraviolet Optica 4(8), 871 - 878 (2017) [10.1364/OPTICA.4.000871]   Time-resolved spectroscopy in the vacuum/extreme ultraviolet (VUV/XUV) spectral range promises to disclose ultrafast dynamics in all states of matter. Completing a measurement within a single shot eliminates the influence of experimental parameter fluctuations and enhances its statistical significance. [...] Restricted: PDF PDF (PDFA); External link: Fulltext 2017-11-0910:16 [PUBDB-2017-11799] Journal Article et al Probing Transient Valence Orbital Changes with Picosecond Valence-to-Core X-ray Emission Spectroscopy The journal of physical chemistry / C 121(5), 2620 - 2626 (2017) [10.1021/acs.jpcc.6b12940]   We probe the dynamics of valence electrons in photoexcited [Fe(terpy)$_2$]$^{2+}$ in solution to gain deeper insight into the Fe−ligand bond changes. We use hard X-rayemission spectroscopy (XES), which combines element specificity and high penetration with sensitivity to orbital structure, making it a powerful technique for molecular studies in a wide variety of environments. [...] Fulltext: PDF; Restricted: PDF PDF (PDFA); 2017-10-2411:53 [PUBDB-2017-11523] Journal Article et al Analysis of XFEL serial diffraction data from individual crystalline fibrils IUCrJ 4(6), 795 - 811 (2017) [10.1107/S2052252517014324]   Serial diffraction data collected at the Linac Coherent Light Source from crystalline amyloid fibrils delivered in a liquid jet show that the fibrils are well oriented in the jet. At low fibril concentrations, diffraction patterns are recorded from single fibrils; these patterns are weak and contain only a few reflections [...] OpenAccess: PDF PDF (PDFA); 2017-08-3116:31 [PUBDB-2017-10204] Journal Article et al Coherent soft X-ray diffraction imaging of coliphage PR772 at the Linac coherent light source Scientific data 4, 170079 (2017) [10.1038/sdata.2017.79]   Single-particle diffraction from X-ray Free Electron Lasers offers the potential for molecular structure determination without the need for crystallization. In an effort to further develop the technique, we present a dataset of coherent soft X-ray diffraction images of Coliphage PR772 virus, collected at the Atomic Molecular Optics (AMO) beamline with pnCCD detectors in the LAMP instrument at the Linac Coherent Light Source. [...] OpenAccess: PDF PDF (PDFA); 2017-08-3108:45 [PUBDB-2017-10155] Report/Journal Article et al First functionality tests of a 64 × 64 pixel DSSC sensor module connected to the complete ladder readout [arXiv:1701.03613] 18th International Workshop on Radiation Imaging Detectors (IWORID 2016), Meeting locationBarcelona, Spain, 3 Jul 2016 - 7 Jul 2016 Journal of Instrumentation 12(03), C03025 - C03025 (2017) [10.1088/1748-0221/12/03/C03025]   The European X-ray Free Electron Laser (XFEL.EU) will provide every 0.1 s a train of 2700 spatially coherent ultrashort X-ray pulses at 4.5 MHz repetition rate. The Small Quantum Systems (SQS) instrument and the Spectroscopy and Coherent Scattering instrument (SCS) operate with soft X-rays between 0.5 keV–6 keV. [...] Restricted: PDF PDF (PDFA); 2017-08-0915:15 [PUBDB-2017-09033] Journal Article et al Single-shot Monitoring of Ultrafast Processes via X-ray Streaking at a Free Electron Laser Scientific reports 7(1), 7253 (2017) [10.1038/s41598-017-07069-z]   The advent of x-ray free electron lasers has extended the unique capabilities of resonant x-ray spectroscopy techniques to ultrafast time scales. Here, we report on a novel experimental method that allows retrieving with a single x-ray pulse the time evolution of an ultrafast process, not only at a few discrete time delays, but continuously over an extended time window [...] OpenAccess: PDF PDF (PDFA); 2017-08-0814:44 [PUBDB-2017-08920] Contribution to a conference proceedings/Contribution to a book et al Terahertz-induced optical birefringence in liquid water CLEO: Science and Innovations in Proceedings Conference on Lasers and Electro-OpticsConference on Lasers and Electro-Optics, CLEO 2017, Meeting locationSan Jose,California, USA, 14 May 2017 - 19 May 2017 Washington, D.C. : OSA, STu3J.8 (2017) [10.1364/CLEO_SI.2017.STu3J.8] special issue: "CLEO: Science and Innovations"   We have observed optical birefringence in neat water induced by single-cycle intense terahertz pulses. The refractive index changes are explained by the electronic polarizability modulated by molecular orientation driven by the strong terahertz electric field.. Restricted: PDF PDF (PDFA); 2017-07-2510:57 [PUBDB-2017-08413] Journal Article et al Single-shot determination of focused FEL wave fields using iterative phase retrieval Optics express 25(15), 17892 - 17903 (2017) [10.1364/OE.25.017892]   Determining fluctuations in focus properties is essential for many experiments at Self-Amplified-Spontaneous-Emission (SASE) based Free-Electron-Lasers (FELs), in particular for imaging single non-crystalline biological particles. We report on a diffractive imaging technique to fully characterize highly focused, single-shot pulses using an iterative phase retrieval algorithm, and benchmark it against an existing Hartmann wavefront sensor. [...] Fulltext: PDF PDF (PDFA); 2017-07-1817:40 [PUBDB-2017-07906] Preprint/Report Saldin, E. On Radiation Emission from a Microbunched Beam with Wavefront Tilt and Its Experimental Observation [DESY-17-093; arXiv:1706.10185]   In this paper we compare experimental observations and theory of radiation emission from a microbunched beam with microbunching wavefront tilt with respect to the direction of motion. The theory refers to the work [1], which predicts, in this case, exponential suppression of coherent radiation along the kicked direction. [...] OpenAccess: PDF PDF (PDFA); 2017-06-2310:06 [PUBDB-2017-05924] Journal Article et al Statistical properties of a free-electron laser revealed by Hanbury Brown?Twiss interferometry Physical review / A 95(2), 023843 (2017) [10.1103/PhysRevA.95.023843]   We present a comprehensive experimental analysis of statistical properties of the self-amplified spontaneous emission free-electron laser (FEL) FLASH by means of Hanbury Brown and Twiss interferometry. The experiments were performed at FEL wavelengths of 5.5, 13.4, and 20.8 nm [...] OpenAccess: PDF PDF (PDFA);