Grazing-incidence synchrotron radiation diffraction studies on irradiated Ce-doped and pristine Y-stabilized ZrO2 at the Rossendorf beamline
In this work, Ce-doped yttria-stabilized zirconia (YSZ) and pure YSZ phases were subjected to irradiation with 14 MeV Au ions. Irradiation studies were performed to simulate long-term structural and microstructural damage due to self-irradiation in YSZ phases hosting alpha-active radioactive species. It was found that both the Ce-doped YSZ and the YSZ phases had a reasonable tolerance to irradiation at high ion fluences and the bulk crystallinity was well preserved. Nevertheless, local microstrain increased in all compounds under study after irradiation, with the Ce-doped phases being less affected than pure YSZ. Dopin...
Source: Journal of Synchrotron Radiation - February 16, 2024 Category: Physics Authors: Svitlyk, V. Braga Ferreira dos Santos, L. Niessen, J. Gilson, S. Marquardt, J. Findeisen, S. Richter, S. Akhmadaliev, S. Huittinen, N. Hennig, C. Tags: yttria-stabilized zirconia irradiation synchrotron radiation grazing incidence diffraction microstrain beamlines Source Type: research
Quantifying bunch-mode influence on photon-counting detectors at SPring-8
Count-loss characteristics of photon-counting 2D detectors are demonstrated for eight bunch-modes at SPring-8 through Monte Carlo simulations. As an indicator, the effective maximum count rate was introduced to signify the X-ray intensity that the detector can count with a linearity of 1% or better after applying a count-loss correction in each bunch-mode. The effective maximum count rate is revealed to vary depending on the bunch-mode and the intrinsic dead time of the detectors, ranging from 0.012 to 0.916 Mcps (megacounts per second) for a 120 ns dead time, 0.009 to 0.807 Mcps for a 0.5 µ s dead time an...
Source: Journal of Synchrotron Radiation - February 16, 2024 Category: Physics Authors: Imai, Y. Hatsui, T. Tags: photon-counting 2D detectors count-loss bunch-modes maximun count rates rate correction research papers Source Type: research
The role of carboxylate ligand orbitals in the breathing dynamics of a metal-organic framework by resonant X-ray emission spectroscopy
Metal-organic frameworks (MOFs) exhibit structural flexibility induced by temperature and guest adsorption, as demonstrated in the structural breathing transition in certain MOFs between narrow-pore and large-pore phases. Soft modes were suggested to entropically drive such pore breathing through enhanced vibrational dynamics at high temperatures. In this work, oxygen K-edge resonant X-ray emission spectroscopy of the MIL-53(Al) MOF was performed to selectively probe the electronic perturbation accompanying pore breathing dynamics at the ligand carboxylate site for metal – ligand interaction. It was observed that the tem...
Source: Journal of Synchrotron Radiation - February 16, 2024 Category: Physics Authors: Ugalino, R. Yamazoe, K. Miyawaki, J. Kiuchi, H. Kurahashi, N. Kosegawa, Y. Harada, Y. Tags: resonant X-ray emission spectroscopy phase transition metal-organic framework research papers Source Type: research
ProSPyX: software for post-processing images of X-ray ptychography with spectral capabilities
X-ray ptychography is a coherent diffraction imaging technique based on acquiring multiple diffraction patterns obtained through the illumination of the sample at different partially overlapping probe positions. The diffraction patterns collected are used to retrieve the complex transmittivity function of the sample and the probe using a phase retrieval algorithm. Absorption or phase contrast images of the sample as well as the real and imaginary parts of the probe function can be obtained. Furthermore, X-ray ptychography can also provide spectral information of the sample from absorption or phase shift images by capturing...
Source: Journal of Synchrotron Radiation - February 9, 2024 Category: Physics Authors: Boudjehem, R. Kulow, A. P é rez, J. Gautier, E. Ould-chikh, S. Pairis, S. Hazemann, J.-L. da Silva, J.C. Tags: ProSPyX X-ray spectral ptychography graphical user interface PyQt5 Toupy computer programs Source Type: research
Investigation of structural and reflective characteristics of short-period Mo/B4C multilayer X-ray mirrors
The results of a study of the structural and reflective characteristics of short-period multilayer X-ray mirrors based on Mo/B4C at wavelengths 1.54 Å , 9.89 Å and 17.59 Å are presented. The period of the samples varied in the range 8 – 35 Å . The average widths of the interfaces were ∼ 3.5 and 2.2 Å at one and the other boundaries, with a tendency for weak growth with any decrease in the period. The interlayer roughness was ∼ 1 Å . The research results indicate promising prospects for the use of multilayer Mo/B4C mirrors for synchrotron applications. (Source: Journal of Synchrotron Radiation)
Source: Journal of Synchrotron Radiation - February 9, 2024 Category: Physics Authors: Shaposhnikov, R. Polkovnikov, V. Garakhin, S. Vainer, Y. Chkhalo, N. Smertin, R. Durov, K. Glushkov, E. Yakunin, S. Borisov, M. Tags: X-ray multilayer mirrors synchrotron applications X-ray monochromators research papers Source Type: research
Ultrashort large-bandwidth X-ray free-electron laser generation with a dielectric-lined waveguide
Large-bandwidth pulses produced by cutting-edge X-ray free-electron lasers (FELs) are of great importance in research fields like material science and biology. In this paper, a new method to generate high-power ultrashort FEL pulses with tunable spectral bandwidth with spectral coherence using a dielectric-lined waveguide without interfering operation of linacs is proposed. By exploiting the passive and dephasingless wakefield at terahertz frequency excited by the beam, stable energy modulation can be achieved in the electron beam and large-bandwidth high-intensity soft X-ray radiation can be generated. Three-dimensional s...
Source: Journal of Synchrotron Radiation - February 9, 2024 Category: Physics Authors: Liu, Y. Wang, Z. Tu, L. Feng, C. Zhao, Z. Tags: free-electron laser dielectric wakefield large-bandwidth X-ray terahertz research papers Source Type: research
xrdPlanner: exploring area detector geometries for powder diffraction and total scattering experiments
xrdPlanner is a software package designed to aid in the planning and preparation of powder X-ray diffraction and total scattering beam times at synchrotron facilities. Many modern beamlines provide a flexible experimental setup and may have several different detectors available. In combination with a range of available X-ray energies, it often makes it difficult for the user to explore the available parameter space relevant for a given experiment prior to the scheduled beam time. xrdPlanner was developed to provide a fast and straightforward tool that allows users to visualize the accessible part of reciprocal space of the...
Source: Journal of Synchrotron Radiation - February 2, 2024 Category: Physics Authors: Krause, L. Gj ø rup, F.H. J ø rgensen, M.R.V. Tags: X-ray diffraction X-ray scattering synchrotron facilities software tools experiment planning computer programs Source Type: research
Open-source electrochemical cell for in situ X-ray absorption spectroscopy in transmission and fluorescence modes
X-ray spectroscopy is a valuable technique for the study of many materials systems. Characterizing reactions in situ and operando can reveal complex reaction kinetics, which is crucial to understanding active site composition and reaction mechanisms. In this project, the design, fabrication and testing of an open-source and easy-to-fabricate electrochemical cell for in situ electrochemistry compatible with X-ray absorption spectroscopy in both transmission and fluorescence modes are accomplished via windows with large opening angles on both the upstream and downstream sides of the cell. Using a hobbyist computer numerical ...
Source: Journal of Synchrotron Radiation - February 2, 2024 Category: Physics Authors: Lopez-Astacio, H. Vargas-Perez, B.L. Del Valle-Perez, A. Pollock, C.J. Cunci, L. Tags: electrochemical cells for in situ XAS EXAFS ORR catalysts research papers Source Type: research
Enhancing electrospray ionization efficiency for particle transmission through an aerodynamic lens stack
We report absolute particle transmission values for different neutralizers and geometries while keeping the conditions suitable for SPI experiments. Our findings reveal that a vacuum ultraviolet ionizer demonstrates a transmission efficiency approximately seven times greater than the soft X-ray ionizer used previously. Combined with an optimized orifice size on the counter electrode, we achieve>40% particle transmission from solution into the X-ray interaction region. These findings offer valuable insights for optimizing electrospray aerosol generator configurations and data rates for SPI experiments. (Source: Journal of S...
Source: Journal of Synchrotron Radiation - February 2, 2024 Category: Physics Authors: Rafie-Zinedine, S. Varma Yenupuri, T. Worbs, L. Maia, F.R.N.C. Heymann, M. Schulz, J. Bielecki, J. Tags: electrospray ionization aerosol injection aerosol neutralization single-particle imaging XFELs research papers Source Type: research
A new modular framework for high-level application development at HEPS
As a representative of the fourth-generation light sources, the High Energy Photon Source (HEPS) in Beijing, China, utilizes a multi-bend achromat lattice to obtain an approximately 100 times emittance reduction compared with third-generation light sources. New technologies bring new challenges to operate the storage ring. In order to meet the beam commissioning requirements of HEPS, a new framework for the development of high-level applications (HLAs) has been created. The key part of the new framework is a dual-layer physical module to facilitate the seamless fusion of physical simulation models with the real machine, al...
Source: Journal of Synchrotron Radiation - February 1, 2024 Category: Physics Authors: Lu, X. Zhao, Y. Ji, H. Jiao, Y. Li, J. Li, N. Meng, C. Peng, Y. Ji, D. Wei, Y. Xu, H. Pan, W. Xu, G. Tags: high-level application Pyapas physical quantities computer programs Source Type: research
DOMAS: a data management software framework for advanced light sources
In recent years, China's advanced light sources have entered a period of rapid construction and development. As modern X-ray detectors and data acquisition technologies advance, these facilities are expected to generate massive volumes of data annually, presenting significant challenges in data management and utilization. These challenges encompass data storage, metadata handling, data transfer and user data access. In response, the Data Organization Management Access Software (DOMAS) has been designed as a framework to address these issues. DOMAS encapsulates four fundamental modules of data management software, including...
Source: Journal of Synchrotron Radiation - February 1, 2024 Category: Physics Authors: Hu, H. Lei, L. Wang, H. Zhuang, B. Zhang, R. Luo, Q. Sun, X. Qi, F. Tags: data management metadata catalogue data transfer data service research papers Source Type: research
Image registration for in situ X-ray nano-imaging of a composite battery cathode with deformation
The structural and chemical evolution of battery electrodes at the nanoscale plays an important role in affecting the cell performance. Nano-resolution X-ray microscopy has been demonstrated as a powerful technique for characterizing the evolution of battery electrodes under operating conditions with sensitivity to their morphology, compositional distribution and redox heterogeneity. In real-world batteries, the electrode could deform upon battery operation, causing challenges for the image registration which is necessary for several experimental modalities, e.g. XANES imaging. To address this challenge, this work develops...
Source: Journal of Synchrotron Radiation - February 1, 2024 Category: Physics Authors: Su, B. Qian, G. Gao, R. Tao, F. Zhang, L. Du, G. Deng, B. Pianetta, P. Liu, Y. Tags: image registration transmission X-ray microscopy battery electrode deformation chemical heterogeneity research papers Source Type: research
Angle-resolved X-ray emission spectroscopy facility realized by an innovative spectrometer rotation mechanism at SPring-8 BL07LSU
The X-ray emission spectrometer at SPring-8 BL07LSU has recently been upgraded with advanced modifications that enable the rotation of the spectrometer with respect to the scattering angle. This major upgrade allows the scattering angle to be flexibly changed within the range of 45 – 135 ° , which considerably simplifies the measurement of angle-resolved X-ray emission spectroscopy. To accomplish the rotation system, a sophisticated sample chamber and a highly precise spectrometer rotation mechanism have been developed. The sample chamber has a specially designed combination of three rotary stages that can smoothly move...
Source: Journal of Synchrotron Radiation - February 1, 2024 Category: Physics Authors: Miyawaki, J. Kosegawa, Y. Harada, Y. Tags: X-ray emission spectroscopy resonant inelastic X-ray scattering spectrometer research papers Source Type: research
A thermal deformation optimization method for cryogenically cooled silicon crystal monochromators under high heat load
A method to optimize the thermal deformation of an indirectly cryo-cooled silicon crystal monochromator exposed to intense X-rays at a low-emittance diffraction-limited synchrotron radiation source is presented. The thermal-induced slope error of the monochromator crystal has been studied as a function of heat transfer efficiency, crystal temperature distribution and beam footprint size. A partial cooling method is proposed, which flattens the crystal surface profile within the beam footprint by modifying the cooling contact area to optimize the crystal peak temperature. The optimal temperature varies with different photon...
Source: Journal of Synchrotron Radiation - January 22, 2024 Category: Physics Authors: Liu, J. Ji, Z. Fan, Y. Yan, X. Wang, M. Qin, H. Tags: monochromator silicon crystal thermal deformation cryo-cooled scheme research papers Source Type: research
Correlation of refractive index based and THz streaking arrival time tools for a hard X-ray free-electron laser
To fully exploit ultra-short X-ray pulse durations routinely available at X-ray free-electron lasers to follow out-of-equilibrium dynamics, inherent arrival time fluctuations of the X-ray pulse with an external perturbing laser pulse need to be measured. In this work, two methods of arrival time measurement were compared to measure the arrival time jitter of hard X-ray pulses. The methods were photoelectron streaking by a THz field and a transient refractive index change of a semiconductor. The methods were validated by shot-to-shot correction of a pump – probe transient reflectivity measurement. An ultimate shot-to-shot...
Source: Journal of Synchrotron Radiation - January 22, 2024 Category: Physics Authors: B ł achucki, W. Johnson, P.J.M. Usov, I. Divall, E. Cirelli, C. Knopp, G. Jurani ć , P. Patthey, L. Szlachetko, J. Lemke, H. Milne, C. Arrell, C. Tags: X-ray free-electron lasers timing tools THz streaking spatial encoding research papers Source Type: research
