Energy-dispersive Laue diffraction by means of a pnCCD detector coupled to a CsI(Tl) scintillator using ultra-hard X-ray synchrotron radiation

Shokr, M.; Tosson, A.; Abboud, Ali J.; Algashi, A.; Schlosser, Dieter; Hartmann, R.; Klaus, Manuela; Genzel, Christoph; Strüder, L.; Pietsch, U.

doi:10.1107/s160057751900626x

Cited by 3 publications

(4 citation statements)

References 31 publications

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“…This pattern contains intense spots (reflections) representing each a crystal plane which fulfills the Bragg condition [11,15]. However, usual 2D detectors are not able to index the Bragg peaks without preliminary information but this is possible using an energy-dispersive detector [13,16]. Thus, the information obtained by EDLD allows to monitor the crystal structure and structural changes induced by external perturbations.…”

Section: Jinst 14 P01008mentioning

confidence: 99%

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EDLD-Tool: A real-time GPU-based tool to stream and analyze energy-dispersive Laue diffraction of BIG Data sets collected by a pnCCD

Tosson¹,

Shokr

Abboud

et al. 2019

J. Inst.

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Energy-dispersive Laue diffraction (EDLD) is a tool for the characterization of singlecrystalline and polycrystalline materials. Using a two-dimensional energy-dispersive detector, both the angular positions and the diffracting energies of the Laue spots can be analysed without additional information, allowing for fast indexing, determination of the crystal structure and the respective lattice parameters. Running the detector at ≈ 400 Hz, a typical data set (≈ 10 min) taken by the single photon counting mode has a size of ten Gigabytes. Up to now, problems such as data transfer, data storage, data reduction and on time data analysis are drawbacks for wider application of this technique. A fast and effective algorithm for processing of these BIG Data is required to overcome the drawbacks and to allow for quality assessment of the running experiment in real time. This paper presents a GPU based tool for energy-dispersive Laue diffraction (EDLD) experiments, named "EDLD-Tool", providing the optimization of geometric parameters of the experiment, autoindexation, online steering, error detection and determination of all crystal parameters considering pnCCD data taken from a single crystal. This tool is exploiting parallel computing technology of the GPU and makes use of many scientific, high performance libraries (i.e. OpenCV, Root-Cern, Eigen and others). As a result, the developed tool allows for data processing in the time frame of few seconds compared to the previous analysis system which requires few hours to process the same amount of data.

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Section: Jinst 14 P01008mentioning

confidence: 99%

“…The simultaneous determination of the position and the energy of an event enables to extract crystallographic information (i.e. unit-cell, texture and full strain tensor) of the probed samples by X-ray exposure without sample rotation and preliminary information [10,11,16].…”

Section: • Time Stampmentioning

confidence: 99%

EDLD-Tool: A real-time GPU-based tool to stream and analyze energy-dispersive Laue diffraction of BIG Data sets collected by a pnCCD

Tosson¹,

Shokr

Abboud

et al. 2019

J. Inst.

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“…IThe pnCCDs have also been widely used in ground-based experiments, such as X-ray spectrometers at synchrotron radiation facilities and X-ray free-electron laser facilities (Strüder et al 2010;Roseker et al 2018;Shokr et al 2019). Additionally, the focusing X-ray mirrors of eROSITA were well calibrated by a prototype of pnCCD on the PANTER X-ray test facility of the Max Planck Institute for Extraterrestrial Physics in Germany (Burwitz et al 2014;Dennerl et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Characterization of a pnCCD-based Camera for Applications at the 100 m X-Ray Test Facility*

Hou¹,

Wang²,

Zhao³

et al. 2023

PASP

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The 100 m long X-ray test facility (100XF for clarity) in Institute of High Energy Physics of CAS has been playing an increasingly important role in the X-ray astronomy field in China. 100XF has been contributing to the missions under development, such as the Einstein Probe mission. The facility has also been providing support to R&D of focusing X-ray optics in China that will enable future X-ray telescopes to be realized, such as the enhanced X-ray Timing and Polarization (eXTP) mission. A pnCCD-based camera has been employed at 100XF to rapidly measure the performance of the X-ray optics. In this work, we study the performance of the camera and its spectral and imaging applications at 100XF. The camera system can provide a high frame readout rate, with a low readout noise <3 e−. It is sensitive to X-ray photons in the 3–10 keV energy band with a high quantum efficiency exceeding 90%. Actually, the low threshold of detection energy range can reach down to 0.2 keV. The energy resolution can reach 145.2 eV for single events and 154.8 eV for all valid events (including single events and split events) at 6.4 keV. The camera also exhibits excellent imaging capability in both the full frame mode and the windowing mode, with a readout rate of up to 1000 Hz. Finally, a prototype of a focusing X-ray mirror shell of eXTP was smoothly measured with this camera. The obtained on-axis point-spread function and half-power diameter are consistent with expectations. It is proven that the camera can improve the capability of 100XF in characterizing the X-ray optics. This camera will be very useful for performing on-ground calibrations for future X-ray telescope missions.

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“…For instance, polychromatic diffraction contrast tomography experiments can also be performed under laboratory conditions (King et al, 2014;Bachmann et al, 2019). Recently, a new technique called energy-dispersive Laue diffraction (EDLD) has been developed to determine the lattice parameters of an unknown crystal using synchrotron (Shokr et al, 2019) and laboratory (Kurdzesau, 2019) radiation. EDLD uses the latest generations of X-ray detectors such as pnCCD (Leitenberger et al, 2008) or hybrid photon counting (HPC) detectors (Brö nni-mann et al, 2001) to measure the energy of the diffraction spots.…”

Section: Introductionmentioning

confidence: 99%

A laboratory transmission diffraction Laue setup to evaluate single-crystal quality

Arnaud¹,

Guediche²,

Remacha³

et al. 2020

J Appl Crystallogr

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A scanning laboratory Laue transmission setup is developed to probe extended quasi-monocrystalline samples. Orientation mapping is achieved by controlling the collimation of the incident beam and scanning the position of the specimen. An automated indexing algorithm for transmission Laue patterns is presented, together with a forward simulation model adapted for a laboratory setup. The effect of the main parameters of the system is studied with the aim of achieving exposure times of the order of one second. Applications are presented to probe the orientation of an extended part and detect disoriented regions within the bulk. Finally, the analysis of diffraction spot shapes shows that the misorientation within the illuminated volume can be measured, and a new method is proposed to evaluate its complete mean lattice rotation tensor.

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Energy-dispersive Laue diffraction by means of a pnCCD detector coupled to a CsI(Tl) scintillator using ultra-hard X-ray synchrotron radiation

Cited by 3 publications

References 31 publications

EDLD-Tool: A real-time GPU-based tool to stream and analyze energy-dispersive Laue diffraction of BIG Data sets collected by a pnCCD

EDLD-Tool: A real-time GPU-based tool to stream and analyze energy-dispersive Laue diffraction of BIG Data sets collected by a pnCCD

Characterization of a pnCCD-based Camera for Applications at the 100 m X-Ray Test Facility*

A laboratory transmission diffraction Laue setup to evaluate single-crystal quality

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