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View article: Multiple freezing–melting pathways of high-density ice through ice XXI phase at room temperature
Multiple freezing–melting pathways of high-density ice through ice XXI phase at room temperature Open
Various metastable ice phases and their complicated transition pathways have been found by pressurization at low temperatures at which slow kinetics and high metastability are easily achieved. By contrast, such diversity is less expected a…
View article: Synthesis of Gold Hydride at High Pressure and High Temperature
Synthesis of Gold Hydride at High Pressure and High Temperature Open
Gold is an unreactive metal and its chemical interactions with hydrogen have only recently been explored. Here, we report the formation of gold hydride above 40 GPa and 2200 K in X‐ray free electron laser heated diamond anvil cells using v…
View article: Observation of Body-Centered Cubic Iron above 200 Gigapascals
Observation of Body-Centered Cubic Iron above 200 Gigapascals Open
The crystallographic structure of iron under extreme conditions is a key benchmark for cutting-edge experimental and numerical methods. Moreover, it plays a crucial role in understanding planetary cores, as it significantly influences the …
View article: Development of CoRDIA: An Imaging Detector for Next-Generation Synchrotron Rings and Free Electron Lasers
Development of CoRDIA: An Imaging Detector for Next-Generation Synchrotron Rings and Free Electron Lasers Open
CoRDIA (Continuous Readout Digitizing Imager Array) is a hybrid pixel detector development targeted to 4 th generation synchrotron sources and (continuous) high-rate Free Electron Lasers. Serving the latter it builds upon the concept of th…
View article: Multiple freezing–melting pathways of high-density ice at room temperature
Multiple freezing–melting pathways of high-density ice at room temperature Open
Various metastable ice phases and their complicated transition pathways have been found by pressurization at low temperatures, where slow kinetics and high metastability can be easily achieved. In contrast, such diversity is less expected …
View article: Ultrafast Yttrium Hydride Chemistry at High Pressures via Non-equilibrium States Induced by an X-ray Free Electron Laser
Ultrafast Yttrium Hydride Chemistry at High Pressures via Non-equilibrium States Induced by an X-ray Free Electron Laser Open
Controlling the formation and stoichiometric content of the desired phases of materials has become of central interest for a variety of fields. The possibility of accessing metastable states by initiating reactions by X-ray-triggered mecha…
View article: Measurement bias in self-heating x-ray free electron laser experiments from diffraction studies of phase transformation in titanium
Measurement bias in self-heating x-ray free electron laser experiments from diffraction studies of phase transformation in titanium Open
X-ray self-heating is a common by-product of X-ray Free Electron Laser (XFEL) techniques that can affect targets, optics, and other irradiated materials. Diagnosis of heating and induced changes in samples may be performed using the x-ray …
View article: The Thermal Conductivity of Bridgmanite at Lower Mantle Conditions Using a Multi‐Technique Approach
The Thermal Conductivity of Bridgmanite at Lower Mantle Conditions Using a Multi‐Technique Approach Open
The thermal conductivity of bridgmanite, the primary constituent of the Earth's lower mantle, has been investigated using diamond anvil cells at pressures up to 85 GPa and temperatures up to 3,100 K. We report the results of time‐domain op…
View article: Development of the Continuous Readout Digitising Imager Array detector
Development of the Continuous Readout Digitising Imager Array detector Open
The CoRDIA project aims to develop an X-ray imager capable of continuous operation in excess of 100 kframe/s. The goal is to provide a suitable instrument for Photon Science experiments at diffraction-limited Synchrotron Rings and Free Ele…
View article: Operational experience with Adaptive Gain Integrating Pixel Detectors at European XFEL
Operational experience with Adaptive Gain Integrating Pixel Detectors at European XFEL Open
The European X-ray Free Electron Laser (European XFEL) is a cutting-edge user facility that generates per second up to 27,000 ultra-short, spatially coherent X-ray pulses within an energy range of 0.26 to more than 20 keV. Specialized inst…
View article: Detector developments for photon science at DESY
Detector developments for photon science at DESY Open
The past, current and planned future developments of X-ray imagers in the Photon-Science Detector Group at DESY-Hamburg is presented. the X-ray imagers are custom developed and tailored to the different X-ray sources in Hamburg, including …
View article: Ultra-fast yttrium hydride chemistry at high pressures via non-equilibrium states induced by x-ray free electron laser
Ultra-fast yttrium hydride chemistry at high pressures via non-equilibrium states induced by x-ray free electron laser Open
Controlling the formation and stoichiometric content of desired phases of materials has become a central interest for the study of a variety of fields, notably high temperature superconductivity under extreme pressures. The further possibi…
View article: A MHz X-ray diffraction set-up for dynamic compression experiments in the diamond anvil cell
A MHz X-ray diffraction set-up for dynamic compression experiments in the diamond anvil cell Open
An experimental platform for dynamic diamond anvil cell (dDAC) research has been developed at the High Energy Density (HED) Instrument at the European X-ray Free Electron Laser (European XFEL). Advantage was taken of the high repetition ra…
View article: Single and multi-pulse based X-ray photon correlation spectroscopy
Single and multi-pulse based X-ray photon correlation spectroscopy Open
The ability of pulsed nature of synchrotron radiation opens up the possibility of studying microsecond dynamics in complex materials via speckle-based techniques. Here, we present the study of measuring the dynamics of a colloidal system b…
View article: Development of CoRDIA: an Imaging Detector for next-generation Synchrotron Rings and Free Electron Lasers
Development of CoRDIA: an Imaging Detector for next-generation Synchrotron Rings and Free Electron Lasers Open
An x-ray imager is being developed for use in diffraction-limited synchrotron rings and continuous wave free electron lasers. The imager is named CoRDIA (COntinuous Readout Digitising Imager Array) and aims at achieving continuous operatio…
View article: Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source
Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source Open
X-ray photon correlation spectroscopy (XPCS) is a routine technique to study slow dynamics in complex systems at storage-ring sources. Achieving nanosecond time resolution with the conventional XPCS technique is, however, still an experime…
View article: Evaluation of serial crystallographic structure determination within megahertz pulse trains
Evaluation of serial crystallographic structure determination within megahertz pulse trains Open
The new European X-ray Free-Electron Laser (European XFEL) is the first X-ray free-electron laser capable of delivering intense X-ray pulses with a megahertz interpulse spacing in a wavelength range suitable for atomic resolution structure…
View article: Diffraction anomalous fine structure in Laue geometry
Diffraction anomalous fine structure in Laue geometry Open
This thesis deals with the further development of the method of Borrmannspectroscopy and the development of the novel method of diffractionanomalous fine structure in Laue geometry.Borrmann spectroscopy utilizes the Borrmann effect in orde…
View article: The Adaptive Gain Integrating Pixel Detector at the European XFEL
The Adaptive Gain Integrating Pixel Detector at the European XFEL Open
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. This has a…
View article: The Adaptive Gain Integrating Pixel Detector at the European XFEL
The Adaptive Gain Integrating Pixel Detector at the European XFEL Open
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. This has a…
View article: Megahertz serial crystallography
Megahertz serial crystallography Open
The new European X-ray Free-Electron Laser is the first X-ray free-electron laser capable of delivering X-ray pulses with a megahertz inter-pulse spacing, more than four orders of magnitude higher than previously possible. However, to date…
View article: AGIPD: a multi megapixel, multi megahertz X-ray camera for the European XFEL
AGIPD: a multi megapixel, multi megahertz X-ray camera for the European XFEL Open
AGIPD is a hybrid pixel detector developed by DESY, PSI, and the Universities of Bonn and Hamburg. It is targeted for use at the European XFEL, a source with unique properties: a train of up to 2700 pulses is repeated at 10 Hz rate. The pu…