New dynamic diamond anvil cells for tera-pascal per second fast compression x-ray diffraction experiments

Jenei, Zsolt; Liermann, Hanns‐Peter; Husband, R. J.; Méndez, Alba San José; Pennicard, David; Marquardt, Hauke; O’Bannon, E. F.; Pakhomova, Anna; Konôpková, Zuzana; Glazyrin, Konstantin; Wendt, M.; Wenz, Sergej; McBride, E. E.; Morgenroth, Wolfgang; Winkler, Björn; Rothkirch, André; Hanfland, Michael; Evans, W. J.

doi:10.1063/1.5098993

Cited by 43 publications

(57 citation statements)

References 42 publications

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“…Our observations indicate that ambient temperature dynamic compression experiments, which become more and more popular (i.e., Ref. [21]), may not reach a full equilibrium at the time of the compression, and their comparison with the static experiments should be performed carefully. Significant amount of strain accommodated during dynamic compression may divert the process from the equilibrium path.…”

Section: Resultsmentioning

confidence: 93%

Revisiting spin-state crossover in (MgFe)O by means of high-resolution x-ray diffraction from a single crystal

et al. 2020

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MgFe)O is a solid solution with ferrous iron undergoing high to low spin state (HS-LS) crossover under high pressure. The exact state of the material in the region of the crossover is still a mystery as domains with different spin states may coexist over a wide pressure range without changing the crystal structure neither in terms of symmetry nor in terms of the atomic positions. At the conditions of the crossover, (MgFe)O is a special type of microscopic disorder system. We explore the influences of: (a) stress-strain relations in a diamond-anvil cell, (b) time-relaxation processes, and (c) the crossover itself on the characteristic features of a single-crystal (111) hkl Bragg spot across the transformation. Using high-resolution x-ray diffraction as a method for studies of unconventional processes at the conditions of suppressed diffusion, we detect and discuss subtle changes in the (111) hkl Bragg spot projections which we measure and analyze as a function of pressure. We report changes in the spot size which can be correlated with the HS-LS relative abundance. In addition, we report the formation of structural defects in a single crystal as an intrinsic material response to the HS-LS crossover. These static defects are formed and accumulated during the compression within the crossover pressure range.

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Section: Resultsmentioning

confidence: 93%

Revisiting spin-state crossover in (MgFe)O by means of high-resolution x-ray diffraction from a single crystal

et al. 2020

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“…Milli-Q H 2 O is loaded along with Au powder (99.99% pure from Sigma-Aldrich) as P marker and a ruby chip to monitor P in the sample during precompression. DACs are inserted in a "cap housing" coupled to a high-voltage piezoelectric actuator (PEA) as described in Jenei et al [31]. DAC and PEA are coupled by tightening the end cap at the back of the housing until a P increase of 1-2 GPa is observed.…”

Section: A Experimental Setupmentioning

confidence: 99%

“…Here we perform compression experiments in combination with time-resolved XRD in order to explore the compressive behavior of H 2 O across the ice VII-ice X transition up to 180 GPa using a dynamic diamond anvil cell (dDAC) driven by a piezoelectric actuator [30,31]. This setup provides quasicontinuous volume-P data, with hundreds of diffraction patterns recorded in one experiment, and therefore allows us to compute compressibility by numerical differentiation without invoking an equation of state model to fit the data [32], a significant advance over prior static experiments with tens of data points.…”

Section: Introductionmentioning

confidence: 99%

Bulk modulus of H2O across the ice VII–ice X transition measured by time-resolved x-ray diffraction in dynamic diamond anvil cell experiments

et al. 2021

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We have studied the H 2 O ice VII-ice X phase transition at room temperature by performing three quasicontinuous synchrotron time-resolved x-ray-diffraction experiments in a dynamic diamond anvil cell, reaching pressures of 180 GPa. The dense pressure coverage of our volume data allows us to directly derive the bulk modulus for H 2 O over the entire pressure range. Our data document three major changes in compression behavior in the ranges of 35-40, 50-55, and 90-110 GPa, likely corresponding to the formation of pretransition dynamically disordered ice VII and ice X, and static ice X, respectively. Our results confirm that ice X has a very high bulk modulus.

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“…Solid black, blue and red lines are linear fits to the data to guide the eye. Jenei et al (2019), the improved IR is due to the decreased pixel size of the XRD 4343CT. Fig.…”

Section: Figure 12mentioning

confidence: 99%

Novel experimental setup for megahertz X-ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X-ray Free-Electron Laser (EuXFEL)

Liermann¹,

Konôpková²,

Appel³

et al. 2021

J Synchrotron Rad

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The high-precision X-ray diffraction setup for work with diamond anvil cells (DACs) in interaction chamber 2 (IC2) of the High Energy Density instrument of the European X-ray Free-Electron Laser is described. This includes beamline optics, sample positioning and detector systems located in the multipurpose vacuum chamber. Concepts for pump–probe X-ray diffraction experiments in the DAC are described and their implementation demonstrated during the First User Community Assisted Commissioning experiment. X-ray heating and diffraction of Bi under pressure, obtained using 20 fs X-ray pulses at 17.8 keV and 2.2 MHz repetition, is illustrated through splitting of diffraction peaks, and interpreted employing finite element modeling of the sample chamber in the DAC.

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New dynamic diamond anvil cells for tera-pascal per second fast compression x-ray diffraction experiments

Abstract: A modular, multi-diagnostic, automated shock tube for gas-phase chemistry Review of Scientific Instruments 90, 064104 (2019);

Cited by 43 publications

References 42 publications

Revisiting spin-state crossover in (MgFe)O by means of high-resolution x-ray diffraction from a single crystal

Revisiting spin-state crossover in (MgFe)O by means of high-resolution x-ray diffraction from a single crystal

Bulk modulus of H2O across the ice VII–ice X transition measured by time-resolved x-ray diffraction in dynamic diamond anvil cell experiments

Novel experimental setup for megahertz X-ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X-ray Free-Electron Laser (EuXFEL)

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