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[PUBDB-2018-02650] Journal Article
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Elastic Softening of $\mathrm{(Mg_{0.8}Fe_{0.2})O}$ Ferropericlase Across the Iron Spin Crossover Measured at Seismic Frequencies
Geophysical research letters 45(14), 6862 - 6868 () [10.1029/2018GL077982]  GO
We experimentally determined the bulk modulus of (Mg$_{0.8}$Fe$_{0.2}$)O ferropericlase across theiron spin transition and in the low-spin phase by employing a new experimental approach. In ourmeasurements, we simulate the propagation of a compressional seismic wave (P wave) through our sampleby employing a piezo-driven dynamic diamond anvil cell that allows to oscillate pressure at seismicfrequencies. [...]
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[PUBDB-2018-01797] Journal Article
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LAMBDA 2M GaAs—A multi-megapixel hard X-ray detector for synchrotrons
11th International Conference on Position Sensitive Detectors, PSD11, Walton Hall, Milton KeynesWalton Hall, Milton Keynes, UK, 3 Sep 2017 - 8 Sep 20172017-09-032017-09-08 Journal of Instrumentation 13(01), C01026 - C01026 () [10.1088/1748-0221/13/01/C01026]  GO
Synchrotrons can provide very intense and focused X-ray beams, which can be used tostudy the structure of matter down to the atomic scale. In many experiments, the quality of theresults depends strongly on detector performance; in particular, experiments studying dynamics ofsamples require fast, sensitive X-ray detectors.“LAMBDA” is a photon-counting hybrid pixel detector system for experiments at synchrotrons,based on the Medipix3 readout chip. [...]
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Embargoed OpenAccess [PUBDB-2018-00052] Contribution to a conference proceedings/Contribution to a book
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Investigation of time dependence of dissipation and strain induced crystallization in natural rubber under cyclic and impact loading
Constitutive Vodels for Rubber X
10th European Conference on Constitutive Models for Rubber, ECCMR X, MunichMunich, Germany, 28 Aug 2017 - 31 Aug 20172017-08-282017-08-31
London : Taylor & Francis Group 173-178 () [10.1201/9781315223278-30]  GO
Strain induced crystallization (SIC) is one of the special features of natural rubber (NR), responsible for its outstanding mechanical performance. Especially, for the short term behavior of NR, e.g. [...]
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OpenAccess [PUBDB-2017-09548] Journal Article
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Transmission zone plates as analyzers for efficient parallel 2D RIXS-mapping
We have implemented and successfully tested an off-axis transmission Fresnel zone plate as spectral analyzer for resonant inelastic X-ray scattering (RIXS). The imaging capabilities of zone plates allow for advanced two-dimensional (2D) mapping applications. [...]
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OpenAccess [PUBDB-2016-05318] Journal Article/Contribution to a conference proceedings
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Data reduction for XAS experiments with the 100 element Ge Detector
16. International Conference on X-ray Absorption Fine Structure, XAFS16, KarlsruheKarlsruhe, Germany, 23 Aug 2015 - 28 Aug 20152015-08-232015-08-28 Journal of physics / Conference Series 712, 012016 () [10.1088/1742-6596/712/1/012016]  GO
X-ray absorption spectroscopy on dilute samples is still a challenge nowadays. By means of the fluorescence processes that follow the absorption it is possible to obtain the XAS spectrum; however, in order to gain sufficient statistics a multi-pixel fluorescence detector is required. [...]
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[PUBDB-2016-04831] Journal Article
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A non-destructive view with X-rays into the strain state of bronze axes
In this paper we present a new approach using highly surface sensitive X-ray diffraction methods for archaeometrical investigation highlighted on the Neolithic Axe of Ahneby. Applying the sin$^2$Ψ-method with a scintillation detector and a MAXIM camera setup, both were usually applied for material strain analysis on modern metal fabrics. [...]
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OpenAccess [PUBDB-2016-04604] Journal Article
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Fast X-ray microfluorescence imaging with submicrometer-resolution integrating a Maia detector at beamline P06 at PETRA III
The high brilliance of third-generation synchrotron sources increases thedemand for faster detectors to utilize the available flux. The Maia detector is anadvanced imaging scheme for energy-dispersive detection realising dwell timesper image-pixel as low as 50 ms and count rates higher than 10 106 s1. [...]
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OpenAccess [PUBDB-2016-02784] Journal Article/Contribution to a conference proceedings
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Fast helicity switching of X-ray circular polarization at beamline P09 at PETRA III
Proceedings of the 12th International Conference on Synchrotron Radiation Instrumentation, SRI2015, New YorkNew York, NY USA, 5 Jul 2015 - 10 Jul 20152015-07-052015-07-10 AIP conference proceedings 1741, 030017 () [10.1063/1.4952840]  GO
At the resonant scattering and diffraction beamline P09 at PETRA III/DESY, polarization manipulation in the X-rayenergy range 3-13 keV is possible using wave-plates. Recently, fast flipping of circular polarization helicity using the Raspberry Pi controlled FPGA (PiLC) device developed at DESY and dedicated piezo-electric flippers has been commissioned. [...]
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[PUBDB-2015-06317] Conference Presentation
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A non destructive view into Neolithic bronze axes
TECHNART 2015, CataniaCatania, Italy, 27 Apr 2015 - 30 Apr 20152015-04-272015-04-30
Results from an ongoing research project of the archaeological state museum chateau Gottorf in Schleswig and the Deutsches Elektronen-Synchrotron in Hamburg are presented. The manufacturing techniques of Neolithic bronze axes were investigated using non destructive measurements. [...]
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Hybrid OpenAccess [PUBDB-2015-02327] Journal Article
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The Extreme Conditions Beamline P02.2 and the Extreme Conditions Science Infrastructure at PETRA III
A detailed description is presented of the Extreme Conditions Beamline P02.2for micro X-ray diffraction studies of matter at simultaneous high pressure andhigh/low temperatures at PETRA III, in Hamburg, Germany. This includesperformance of the X-ray optics and instrumental resolution as well as anoverview of the different sample environments available for high-pressurestudies in the diamond anvil cell. [...]
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