An improved X-ray detector for use at synchrotrons

Thoms, M.; Bauchau, S.; Häusermann, Daniel M.; Kunz, Martin; Bihan, T. Le; Mézouar, M.; Strawbridge, Dick

doi:10.1016/s0168-9002(98)00199-5

Cited by 49 publications

(29 citation statements)

References 12 publications

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“…The powder diffraction rings were collected with an online imaging plate detector. 17 A diffraction pattern of Si was used to determine the sample to detector distance ͑310.042 mm͒. Corrections for spatial distortion, calculation of imaging plate pixel size ͑0.07 ϫ 0.08 mm 2 ͒, and subsequent integration over the complete powder rings were performed using the software FIT2D.…”

Section: B High-pressure Investigationsmentioning

confidence: 99%

High-pressure structural behavior of large-void CoSn-type intermetallics: Experiments and first-principles calculations

et al. 2008

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The high-pressure structural behavior of the binary intermetallic compounds CoSn, FeSn, and NiIn with the peculiar void containing CoSn ͑B35͒-type structure has been studied by means of room-temperature diamond anvil cell and high-temperature multianvil experiments, as well as by first-principles calculations. All three compounds remain structurally stable at pressures up to at least 25 GPa, whereas first-principles calculations predict high-pressure structural changes below 20 GPa. A plausible explanation for the discrepancy is that at room temperature, a sizable activation barrier inhibits kinetically the transformation into more close-packed polymorphs. It is supported by our experiments at temperatures around 1000°C and a pressure of 10 GPa. At these conditions, NiIn transforms into the temperature-quenchable stoichiometric CsCl-type high-pressure phase, which has been predicted in our first-principles calculations. However, CoSn and FeSn decompose into a mixture of compounds richer and poorer in tin, respectively. Nevertheless, it might be possible that lower temperatures and higher pressures may afford theoretically predicted polymorphs. In particular, a phase transformation to the FeSi-type structure predicted for CoSn is of interest as materials with the FeSi-type structure are known for unusual thermal and transport properties.

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Section: B High-pressure Investigationsmentioning

confidence: 99%

High-pressure structural behavior of large-void CoSn-type intermetallics: Experiments and first-principles calculations

et al. 2008

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“…They are increasingly being used for powder diffractometry (Hammersley et al 1996) and provide a number of advantages (Thoms et al 1998) over conventional detectors. As they record a large portion of the Debye-Scherrer ring, the effects of preferred orientation can be clearly observed.…”

Section: Synchrotron-beamline Configurations and Detectors For Powdermentioning

confidence: 99%

“…When transient processes occur on a subsecond scale, the time required to read detectors after exposure is a severe limitation. Recent improvements in online imaging plate (IP) technology (Thoms et al 1998) and CCD capabilities will improve this situation. One simple solution to this problem is to record the pattern continuously behind a slit and then process the data after the reaction is complete (Norby 1996(Norby , 1997b).…”

Section: Synchrotron-beamline Configurations and Detectors For Powdermentioning

confidence: 99%

Dynamic Powder Crystallography With Synchrotron X-Ray Sources

Parise

Cahill

Lee

2000

The Canadian Mineralogist

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The increased brightness, tunability, low divergence and low emittance of X-ray beams available at synchrotron X-ray sources facilitate a variety of powder-diffraction experiments not practical using conventional in-house sources. Furthermore, the increased availability of fast position-sensitive detectors, along with implementation of improved software, make possible new classes of experiments. These include time-resolved powder-diffraction of phase transitions, precipitation, recrystallization and ion-exchange reactions. Examples of time-resolved studies that highlight some of these developments include: (1) observations of the phases forming during reaction under controlled hydrothermal conditions (e.g., FeS); (2) full Rietveld structure refinement using time-resolved data to determine the mechanism of ion exchange in zeolites. The advent of area detectors, commonly coupled with focusing optics at synchrotrons, will further increase the time resolution at the synchrotron, possibly leading to a data glut. Solutions are available now, and developments in the near term will allow semi-automatic decisions on which datasets to analyze amongst the thousands collected.Keywords: synchrotron radiation, crystallography, time-resolved studies, diffraction, scattering, high pressure, element partitioning, phase diagrams, ion-exchange reactions, energy-dispersive diffraction. SOMMAIRELa luminance accrue, la possibilité de syntoniser, la faible divergence et le faible pouvoir émissif des faisceaux de rayons X disponibles aux sources synchrotron permettent une série d'expériences en diffraction X sur poudres qui ne sont pas du tout pratiques avec les sources conventionnelles. De plus, la disponibilité accrue de détecteurs efficaces sensibles à la position et de logiciels améliorés rend possible de nouvelles sortes d'expériences. Par exemple, il est maintenant possible d'étudier par diffraction X sur poudres le progrès dans le temps d'une transition de phases, une précipitation, une recristallisation, et une réaction d'échange ionique. Nous décrivons les exemples suivants pour souligner certains de ces développements: (1) observations des phases apparaissant au cours d'une réaction hydrothermale sous conditions controlées, impliquant par exemple FeS; (2) affinement complet d'une structure par la méthode de Rietveld en utilisant des données échelonnées dans le temps pour étudier le mécanisme d'échange ionique dans les zéolites. L'installation de détecteurs à aire, couplée en général avec une focalisation optique dans le circuit d'un synchrotron, augmenteront surement la résolution temporelle dans de telles expériences, menant nécessairement à un surplus de données. Nous avons déjà des solutions à ce problème, et des développements dans un futur rapproché permettront des décisions semi-automatiques à propos de quels prélèvements de données sont à retenir pour analyse, parmi les milliers qui sont enregistrés.(Traduit par la Rédaction)Mots-clés: rayonnement synchrotron, cristallographie, résolution temporelle, diffractio...

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“…In particular, this device allows a rapid checking (<2 min) of the alignment after each compression or heating of the sample. Angle-dispersive data are collected using image plates mounted on the new fastscan detector (Thoms et al, 1998). This new detector allows the collection of high-quality data in less than 1 min, which is at least one order of magnitude faster than other imagingplate systems.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…However, an important limitation, mentioned by Chen et al (1997Chen et al ( , 1998, is the large acquisition time needed for generating an exploitable image. This limitation has recently been overcome by the use of a new on-line fast imaging-plate detector (Thoms et al, 1998) and the high brilliance of third-generation sources. This paper is dedicated to a detailed description of this new set-up for structural investigation at high pressure and high temperature installed on the high-pressure beamline ID30 at the ESRF.…”

Section: Introductionmentioning

confidence: 99%

Paris–Edinburgh large-volume cell coupled with a fast imaging-plate system for structural investigation at high pressure and high temperature

et al. 1999

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A new set-up for collecting high-quality data suitable for structural re®nement at high pressure and high temperature has been developed on beamline ID30 at the ESRF. The possibility of using high X-ray energies, high brilliance of third-generation sources and a new fast imaging-plate detector interfaced to the Paris±Edinburgh large-volume press has lead to a signi®cant reduction of acquisition time and improvement of the quality of the data. The feasibility of angle-dispersive X-ray diffraction experiments at high pressure and high temperature, even on light elements, has been demonstrated.

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An improved X-ray detector for use at synchrotrons

Cited by 49 publications

References 12 publications

High-pressure structural behavior of large-void CoSn-type intermetallics: Experiments and first-principles calculations

High-pressure structural behavior of large-void CoSn-type intermetallics: Experiments and first-principles calculations

Dynamic Powder Crystallography With Synchrotron X-Ray Sources

Paris–Edinburgh large-volume cell coupled with a fast imaging-plate system for structural investigation at high pressure and high temperature

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