Eur.XFEL

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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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2017-06-23
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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2017-06-15
12:49
[PUBDB-2017-05074] Journal Article
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Quantifying Angular Correlations between the Atomic Lattice and the Superlattice of Nanocrystals Assembled with Directional Linking
Nano letters 17(6), 3511 - 3517 (2017) [10.1021/acs.nanolett.7b00584]  GO
ddc:540
We show that the combination of X-ray scatteringwith a nanofocused beam and X-ray cross correlation analysis is anefficient way for the full structural characterization of mesocrystallinenanoparticle assemblies with a single experiment. We analyze severalhundred diffraction patterns at individual sample locations, that is,individual grains, to obtain a meaningful statistical distribution of thesuperlattice and atomic lattice ordering. [...]
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2017-06-09
10:53
OpenAccess [PUBDB-2017-04587] Journal Article
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Mapping few-femtosecond slices of ultra-relativistic electron bunches
ddc:000
Free-electron lasers are unique sources of intense and ultra-short x-ray pulses that led to major scientific breakthroughs across disciplines from matter to materials and life sciences. The essential element of these devices are micrometer-sized electron bunches with high peak currents, low energy spread, and low emittance. [...]
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2017-06-08
17:06
OpenAccess [PUBDB-2017-04558] Journal Article
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Communication: Direct evidence for sequential dissociation of gas-phase Fe(CO)$_5$ via a singlet pathway upon excitation at 266 nm
ddc:540
We prove the hitherto hypothesized sequential dissociation of Fe(CO)$_5$ in the gas phase upon photoexcitation at 266 nm via a singlet pathway with time-resolved valence and core-level photoelectron spectroscopy with an x-ray free-electron laser. Valence photoelectron spectra are used to identify free CO molecules and to determine the time constants of stepwise dissociation to Fe(CO)$_4$ within the temporal resolution of the experiment and further to Fe(CO)$_3$ within 3 ps [...]
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2017-06-06
14:18
OpenAccess [PUBDB-2017-04342] Contribution to a conference proceedings
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OCELOT as a Framework for Beam Dynamics Simulations of X-RAY Sources
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19
4 p. (2017) [10.3204/PUBDB-2017-04342]  GO
We describe the OCELOT open source project focusing on new beam dynamics simulation capabilities of the whole machine in modern electron-based x-ray sources. Numerical approaches for particle tracking and field calculations are discussed. [...]
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