FS-PS

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2017-04-25
18:11
OpenAccess [PUBDB-2017-01894] Journal Article
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Pressure-induced structural change in liquid GaIn eutectic alloy
ddc:000
Synchrotron x-ray diffraction reveals a pressure induced crystallization at about 3.4 GPa and apolymorphic transition near 10.3 GPa when compressed a liquid GaIn eutectic alloy up to ~13 GPa atroom temperature in a diamond anvil cell. Upon decompression, the high pressure crystalline phaseremains almost unchanged until it transforms to the liquid state at around 2.3 GPa. [...]
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2017-04-10
21:18
OpenAccess [PUBDB-2017-01621] Book/Report/Dissertation / PhD Thesis
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Nuclear Resonance Scattering Study of Iridates, Iridium and Antimony Based Pyrochlores
[DESY-THESIS-2017-013]
DESY-THESIS 170 pp., (2017) [10.3204/PUBDB-2017-01621]  GO
This thesis shows the first synchrotron-based Mössbauer spectroscopy studies on iridium containing compounds and first vibrational spectroscopy on Sb containing compounds carried out at the P01 beamline of PETRA III. In this context, two types of x-ray monochromators have been developed: a monochromator for 73 keV photons with medium energy resolution, and a high-resolution backscattering monochromator based on a sapphire crystal. [...]
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2017-03-15
21:50
OpenAccess [PUBDB-2017-01388] Internal Report
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Atomic Resolution Incoherent Diffractive Imaging (IDI) via Intensity-IntensityCorrelations of Hard X-rays
The advent of accelerator-driven x-ray free-electron lasers has opened new avenues for high resolution structure determination via diffraction methods that go far beyond conventional x-ray crystallography methods. While these techniques rely on coherent scattering, incoherent processes like Compton scattering and fluorescence emission - the predominant scattering mechanism in the x-ray regime - are generally considered detrimental for imaging applications. [...]
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2017-03-14
18:36
OpenAccess [PUBDB-2017-01374] Internal Report
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Quantum Imaging with Incoherently Scattered Light from a Free-Electron Laser
The advent of accelerator-driven x-ray free-electron lasers (FEL) has opened new avenues for high-resolution structure determination via diffraction methods that go far beyond conventional x-ray crystallography methods. These techniques rely on coherent scattering processes that require the maintenance of first-order coherence of the radiation field throughout the imaging procedure. [...]
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2017-03-02
16:54
OpenAccess [PUBDB-2017-01266] Book/Report/Dissertation / PhD Thesis
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Characterization of nanowires by coherent x-ray diffractive imaging and ptychography
[DESY-THESIS-2017-008]
DESY-THESIS 149 pp., (2017) [10.3204/PUBDB-2017-01266]  GO
Imaging techniques are of paramount importance for our understanding of the universe. From galaxies and stars explored by huge telescopes down to micro and nanostructures studied by microscopes, imaging systems provide invaluable scientific information. [...]
OpenAccess: desy-thesis-17-008.title - Download fulltextPDF; Dzhigaev PhD Thesis - Download fulltextPDF;

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2017-02-28
17:05
OpenAccess [PUBDB-2017-01233] Poster
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Fast Detectors and Electronics for Nanosecond Time Resolved Experiments
DESY Photon Science Users Meeting, Meeting locationHamburg, DESY, Germany, 26 Jan 2017 - 27 Jan 20172017-01-262017-01-27
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2017-02-01
14:31
OpenAccess [PUBDB-2017-00827] Book/Report/Dissertation / PhD Thesis
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Interferometry on small quantum systems at short wavelength
[DESY-THESIS-2017-002]
DESY-THESIS 138 pp., (2016) [10.3204/PUBDB-2017-00827]  GO
The present work concentrates on prototypical studies of light-induced correlated manybodydynamics in complex systems. In its course a reflective split-and-delay unit (SDU)for phase-resolved one-color pump-probe experiments with gas phase samples using VUV–XUV laser pulses was built. [...]
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2017-01-31
11:00
OpenAccess [PUBDB-2017-00813] Report/Poster
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Electronic Anisotropy and Magnetic Structure of Iridates Studied by NRS
[04089982026]
DESY Photon Science User Meeting 2017, Meeting locationHamburg, Germany, 27 Jan 2017 - 27 Jan 20172017-01-272017-01-27
 GO
We report on the first observation of nuclear forward scattering (NFS) of synchrotron radiation at the 73 keV $^{193}$-Ir resonance at PETRA III. The large penetration depth of 73 keV photons, the high natural abundance of $^{193}$-Ir (63%), and polarisation dependence of NFS provide unique possibilities to study the electronic and magnetic properties of 5d-transition metal oxides. [...]
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2017-01-24
13:23
OpenAccess [PUBDB-2017-00751] Journal Article
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Rocking curve imaging of high quality sapphire crystals in backscattering geometry
ddc:530
We report on the characterization of high quality sapphire single crystals suitable for high-resolution X-ray optics at high energy. Investigations using rocking curve imaging reveal the crystals to be of uniformly good quality at the level of ∼10$^{−4}$ in lattice parameter variations, δd/d. [...]
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2017-01-24
10:07
[PUBDB-2017-00740] Journal Article

Transient magnetization dynamics in the free energy formulation of the Landau-Lifshitz equation
ddc:530
Transient magnetization dynamics are calculated from the Landau-Lifshitz-Gilbert equation. The internal fields are described by partial derivatives of the sample's free energy density. [...]
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