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2020-01-15
10:14
OpenAccess [PUBDB-2020-00275] Journal Article
et al
Multimodal X-ray imaging of nanocontainer-treated macrophages and calcium distribution in the perilacunar bone matrix
Studies of biological systems typically require the application of several complementary methods able to yield statistically-relevant results at a unique level of sensitivity. Combined X-ray fluorescence and ptychography offer excellent elemental and structural imaging contrasts at the nanoscale. [...]
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2019-12-12
08:49
[PUBDB-2019-05045] Conference Presentation (Other)

Control and Data Acquisition Systems at Petra III experiments
International Workshop in Future Linear Colliders, LCWS2019, SendaiSendai, Japan, 28 Oct 2019 - 1 Nov 20192019-10-282019-11-01
The Petra accelerator, built in 1978 at DESY for serving particle physicsexperiments, was rebuilt in year 2007 as one of the world-best synchrotronradiation sources. A control system for the beamlines was designed andimplemented before the start of the user operation in year 2009.The main solutions and challenges achieved with this control system relatedto crucial points like interfacing the devices, performing measurements,monitoring, storing and transfering data are described in this contribution,highlighting possible differences or similarities with control systems forparticle physics experiments.The system is also partially in use at the FLASH free electron laser at DESY..
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2019-12-04
13:22
OpenAccess [PUBDB-2019-04730] Journal Article/Contribution to a conference proceedings
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Megapixels @ Megahertz – The AGIPD high-speed cameras for the European XFEL
Ultrafast Imaging and Tracking Instrumentation, Methods and Applications Forum 2018, ULITIMA 2018, Argonne, ILArgonne, IL, USA, 11 Sep 2018 - 14 Sep 20182018-09-112018-09-14 Nuclear instruments & methods in physics research / A Accelerators, spectrometers, detectors and associated equipment Section A 942, 162324 - () [10.1016/j.nima.2019.06.065]  GO
The European XFEL is an extremely brilliant Free Electron Laser Source with a very demanding pulse structure: trains of 2700 X-Ray pulses are repeated at 10 Hz. The pulses inside the train are spaced by 220 ns and each one contains up to $10^{12}$ photons of 12.4 keV, while being $\rm \leq 100$ fs in length.AGIPD, the Adaptive Gain Integrating Pixel Detector, is a hybrid pixel detector developed by DESY, PSI, and the Universities of Bonn and Hamburg to cope with these properties. [...]
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2019-11-27
08:34
Embargoed OpenAccess [PUBDB-2019-04503] Journal Article
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Determination of the Surface Facets of Gold Nanorods in Wet‐Coated Thin Films with Grazing‐Incidence Wide Angle X‐Ray Scattering
This work studies the surface facets of gold nanorods (AuNRs) in wet‐coated nanoparticle thin films with synchrotron‐light‐based grazing‐incidence wide angle X‐ray scattering (GIWAXS), which provides statistically relevant results on many nanoparticles. Air‐brush spraying deposits the monodisperse AuNRs into sparse monolayers where the long axis of rods is parallel to the substrate surface [...]
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2019-02-13
14:30
OpenAccess [PUBDB-2019-01075] Journal Article
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The Adaptive Gain Integrating Pixel Detector at the European XFEL
The Adaptive Gain Integrating Pixel Detector (AGIPD) is an X-ray imager, custom designed for the European X-ray Free-Electron Laser (XFEL). It is a fast, low-noise integrating detector, with an adaptive gain amplifier per pixel. [...]
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2019-01-09
16:24
[PUBDB-2019-00237] Journal Article
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Parallel and Perpendicular Alignment of Anisotropic Particles in Free Liquid Microjets and Emerging Microdroplets
Langmuir 34(16), 4843 - 4851 () [10.1021/acs.langmuir.8b00062]  GO
Liquid microjets play a key role in fiber spinning, inkjet printing, and coating processes. In all of these applications, the liquid jets carry dispersed particles whose spatial and orientational distributions within the jet critically influence the properties of the fabricated structures. [...]
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2019-01-09
13:33
OpenAccess [PUBDB-2019-00192] Journal Article
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Towards the geometric structure of small supported $Au_{9}$ clusters on Si
Ultra-small clusters containing few atoms are of high interest in both fundamental research and applications due to their specific functional, magnetic or chemical properties which depend on size and composition. The experimental results of the morphology of the size-selected clusters, consisting of few atoms can be an ideal benchmark for sophisticated theoretical models [...]
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2018-12-20
14:46
OpenAccess [PUBDB-2018-05817] Journal Article
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Morphological properties of airbrush spray-deposited enzymatic cellulose thin films
We investigate the layer formation of enzymatic cellulose by airbrush spray coating on silicon oxide surfaces. The layer structure and morphology of enzymatic cellulose films in the thickness range between 86 nm and 2.1 µm is determined as a function of the spray coating procedures [...]
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2018-07-23
08:54
Embargoed OpenAccess [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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2018-04-20
10:07
[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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