Eur.XFEL

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2017-11-09
10:29
[PUBDB-2017-11802] Journal Article
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Single-shot nonlinear spectroscopy in the vacuum-ultraviolet
Optica 4(8), 871 - 878 (2017) [10.1364/OPTICA.4.000871]  GO
ddc:530
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. [...]
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2017-11-09
10:16
[PUBDB-2017-11799] Journal Article
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Probing Transient Valence Orbital Changes with Picosecond Valence-to-Core X-ray Emission Spectroscopy
ddc:540
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. [...]
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2017-10-24
11:53
OpenAccess [PUBDB-2017-11523] Journal Article
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Analysis of XFEL serial diffraction data from individual crystalline fibrils
IUCrJ 4(6), 795 - 811 (2017) [10.1107/S2052252517014324]  GO
ddc:530
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 [...]
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2017-08-31
16:31
OpenAccess [PUBDB-2017-10204] Journal Article
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Coherent soft X-ray diffraction imaging of coliphage PR772 at the Linac coherent light source
ddc:610
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. [...]
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2017-08-31
08:45
arXiv [PUBDB-2017-10155] Report/Journal Article
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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 20162016-07-032016-07-07 Journal of Instrumentation 12(03), C03025 - C03025 (2017) [10.1088/1748-0221/12/03/C03025]  GO
ddc:610
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. [...]
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2017-08-09
15:15
OpenAccess [PUBDB-2017-09033] Journal Article
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Single-shot Monitoring of Ultrafast Processes via X-ray Streaking at a Free Electron Laser
ddc:000
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 [...]
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2017-08-08
14:44
[PUBDB-2017-08920] Contribution to a conference proceedings/Contribution to a book
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Terahertz-induced optical birefringence in liquid water
CLEO: Science and Innovations in Proceedings Conference on Lasers and Electro-Optics
Conference on Lasers and Electro-Optics, CLEO 2017, Meeting locationSan Jose,California, USA, 14 May 2017 - 19 May 20172017-05-142017-05-19
Washington, D.C. : OSA, STu3J.8 (2017) [10.1364/CLEO_SI.2017.STu3J.8] special issue: "CLEO: Science and Innovations"  GO
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..
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2017-07-25
10:57
DBCoverage [PUBDB-2017-08413] Journal Article
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Single-shot determination of focused FEL wave fields using iterative phase retrieval
Optics express 25(15), 17892 - 17903 (2017) [10.1364/OE.25.017892]  GO
ddc:530
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. [...]
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2017-07-18
17:40
OpenAccess [PUBDB-2017-07906] Preprint/Report
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On Radiation Emission from a Microbunched Beam with Wavefront Tilt and Its Experimental Observation
[DESY-17-093; arXiv:1706.10185]
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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. [...]
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2017-06-23
10:06
OpenAccess [PUBDB-2017-05924] Journal Article
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Statistical properties of a free-electron laser revealed by Hanbury Brown?Twiss interferometry
ddc:530
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 [...]
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