Design and first-round commissioning result of the SASE beamline at the Shanghai Soft X-ray FEL facility
The Shanghai Soft X-ray Free-Electron Laser (SXFEL) is the first X-ray free-electron laser facility in China. The SASE beamline, which consists of a pink-beam branch and a mono-beam branch, is one of the two beamlines in the Phase-I construction. The pink-beam branch opened for users in 2023 after successful first-round beamline commissioning. In this paper, the design of the beamline is presented and the performance of the pink-beam branch is reported. The measured energy-resolving power of the online spectrometer is over 6000 @ 400 eV. The focusing spot size of the pink beam is less than 3 µ m in both the horizo...
Source: Journal of Synchrotron Radiation - November 17, 2023 Category: Physics Authors: Xue, C. Guo, Z. Liu, H. Chen, J. Tong, Y. Fan, J. Jiang, H. Liu, Z. Zhang, X. Tai, R. Tags: free-electron laser SASE beamline online spectrometer focusing spot beamlines Source Type: research
tomoCAM: fast model-based iterative reconstruction via GPU acceleration and non-uniform fast Fourier transforms
X-ray-based computed tomography is a well established technique for determining the three-dimensional structure of an object from its two-dimensional projections. In the past few decades, there have been significant advancements in the brightness and detector technology of tomography instruments at synchrotron sources. These advancements have led to the emergence of new observations and discoveries, with improved capabilities such as faster frame rates, larger fields of view, higher resolution and higher dimensionality. These advancements have enabled the material science community to expand the scope of tomographic measur...
Source: Journal of Synchrotron Radiation - November 10, 2023 Category: Physics Authors: Kumar, D. Parkinson, D.Y. Donatelli, J.J. Tags: X-ray tomography micro-CT synchrotron tomography GPU MBIR nano-CT tomographic reconstruction research papers Source Type: research
Investigation of the mechanical work during ultrasonic fatigue loading using pulsed time-resolved X-ray diffraction
In the energy production and transportation industries, numerous metallic structures may be subjected to at least several billions of cycles, i.e. loaded in the very high cycle fatigue domain (VHCF). Therefore, to design structures in the VHCF domain, a reliable methodology is necessary. One useful quantity to characterize plastic activity at the microscopic scale and fatigue damage evolution is the mechanical work supplied to a material. However, the estimation of this mechanical work in a metal during ultrasonic fatigue tests remains challenging. This paper aims to present an innovative methodology to quantify this. An e...
Source: Journal of Synchrotron Radiation - November 10, 2023 Category: Physics Authors: Jacquemain, V. Cheuleu, C. Ranc, N. Castelnau, O. Michel, V. Vinci, D. Favier, V. Mocuta, C. Thiaudiere, D. Tags: X-ray diffraction ultrasonic fatigue machine very high cycle fatigue pump – probe method pulsed X-ray source research papers Source Type: research
Opportunities and new developments for the study of surfaces and interfaces in soft condensed matter at the SIRIUS beamline of Synchrotron SOLEIL
The SIRIUS beamline of Synchrotron SOLEIL is dedicated to X-ray scattering and spectroscopy of surfaces and interfaces, covering the tender to mid-hard X-ray range (1.1 – 13 keV). The beamline has hosted a wide range of experiments in the field of soft interfaces and beyond, providing various grazing-incidence techniques such as diffraction and wide-angle scattering (GIXD/GIWAXS), small-angle scattering (GISAXS) and X-ray fluorescence in total reflection (TXRF). SIRIUS also offers specific sample environments tailored for in situ complementary experiments on solid and liquid surfaces. Recently, the beamline has added...
Source: Journal of Synchrotron Radiation - November 7, 2023 Category: Physics Authors: Hemmerle, A. Aubert, N. Moreno, T. K é kicheff, P. Heinrich, B. Spagnoli, S. Goldmann, M. Ciatto, G. Fontaine, P. Tags: beamline soft condensed matter grazing-incidence techniques TXRF surface science beamlines Source Type: research
Improvement of ultra-small-angle XPCS with the Extremely Brilliant Source
Recent technical developments and the performance of the X-ray photon correlation spectroscopy (XPCS) method over the ultra-small-angle range with the Extremely Brilliant Source (EBS) at the ESRF are described. With higher monochromatic coherent photon flux ( ∼ 1012 photons s − 1) provided by the EBS and the availability of a fast pixel array detector (EIGER 500K detector operating at 23000 frames s − 1), XPCS has become more competitive for probing faster dynamics in relatively dilute suspensions. One of the goals of the present development is to increase the user-friendliness of the method. This is ...
Source: Journal of Synchrotron Radiation - November 7, 2023 Category: Physics Authors: Ch è vremont, W. Zinn, T. Narayanan, T. Tags: XPCS coherent X-ray scattering speckle contrast UA-XPCS USAXS research papers Source Type: research
Beagle: a near-edge X-ray absorption fine-structure spectroscopy data processing solution for beamline experiments at Pohang Accelerator Laboratory
Near-edge X-ray absorption fine-structure (NEXAFS) spectroscopy is a powerful tool for identifying chemical bonding states at synchrotron radiation facilities. Advances in new materials require researchers in both academia and industry to measure tens to hundreds of samples during the available beam time on a synchrotron beamline, which is typically allocated to users. Automated measurement methods, along with analysis software, have been developed for beamlines. Automated measurements facilitate high-throughput experiments and accumulate vast amounts of measured spectral data. The analysis software supports various functi...
Source: Journal of Synchrotron Radiation - November 6, 2023 Category: Physics Authors: Park, J.Y. Lee, M. Jeong, S.-H. Lee, H.-K. Tags: NEXAFS spectroscopy high-throughput analysis synchrotron radiation beamline spectral data analysis software computer programs Source Type: research
X-ray-induced piezoresponse during X-ray photon correlation spectroscopy of PbMg1/3Nb2/3O3
X-ray photon correlation spectroscopy (XPCS) holds strong promise for observing atomic-scale dynamics in materials, both at equilibrium and during non-equilibrium transitions. Here an in situ XPCS study of the relaxor ferroelectric PbMg1/3Nb2/3O3 (PMN) is reported. A weak applied AC electric field generates strong response in the speckle of the diffuse scattering from the polar nanodomains, which is captured using the two-time correlation function. Correlated motions of the Bragg peak are also observed, which indicate dynamic tilting of the illuminated volume. This tilting quantitatively accounts for the observed two-time ...
Source: Journal of Synchrotron Radiation - November 6, 2023 Category: Physics Authors: Sheyfer, D. Zheng, H. Krogstad, M. Thompson, C. You, H. Eastman, J.A. Liu, Y. Wang, B.-X. Ye, Z.-G. Rosenkranz, S. Phelan, D. Dufresne, E.M. Stephenson, G.B. Cao, Y. Tags: X-ray photon correlation spectroscopy relaxor surface charging X-ray-induced piezoresponse research papers Source Type: research
Spectral-brightness optimization of an X-ray free-electron laser by machine-learning-based tuning
A machine-learning-based beam optimizer has been implemented to maximize the spectral brightness of the X-ray free-electron laser (XFEL) pulses of SACLA. A new high-resolution single-shot inline spectrometer capable of resolving features of the order of a few electronvolts was employed to measure and evaluate XFEL pulse spectra. Compared with a simple pulse-energy-based optimization, the spectral width was narrowed by half and the spectral brightness was improved by a factor of 1.7. The optimizer significantly contributes to efficient machine tuning and improvement of XFEL performance at SACLA. (Source: Journal of Synchrotron Radiation)
Source: Journal of Synchrotron Radiation - October 27, 2023 Category: Physics Authors: Iwai, E. Inoue, I. Maesaka, H. Inagaki, T. Yabashi, M. Hara, T. Tanaka, H. Tags: X-ray free-electron lasers machine learning beam tuning SACLA spectral-brightness optimization single-shot inline spectrometers research papers Source Type: research
synapse: interactive support on photoemission spectroscopy measurement and analysis for non-expert users
In this study, the problems faced by novice users of photoemission spectroscopy are identified, and a native application named synapse with functions to solve these problems is implemented and evaluated qualitatively and quantitatively. This paper describes the contents of an interview survey, the functional design and the implementation of the application synapse based on the interview survey, and results and discussion of the evaluation experiment. (Source: Journal of Synchrotron Radiation)
Source: Journal of Synchrotron Radiation - October 27, 2023 Category: Physics Authors: Masuda, T. Kobayashi, M. Yatani, K. Tags: photoemission spectroscopy synchrotron radiation user interface data analysis research papers Source Type: research
Experimental capabilities for liquid jet samples at sub-MHz rates at the FXE Instrument at European XFEL
The Femtosecond X-ray Experiments (FXE) instrument at the European X-ray Free-Electron Laser (EuXFEL) provides an optimized platform for investigations of ultrafast physical, chemical and biological processes. It operates in the energy range 4.7 – 20 keV accommodating flexible and versatile environments for a wide range of samples using diverse ultrafast X-ray spectroscopic, scattering and diffraction techniques. FXE is particularly suitable for experiments taking advantage of the sub-MHz repetition rates provided by the EuXFEL. In this paper a dedicated setup for studies on ultrafast biological and chemical dynamics...
Source: Journal of Synchrotron Radiation - October 20, 2023 Category: Physics Authors: Lima, F.A. Otte, F. Vakili, M. Ardana-Lamas, F. Biednov, M. Dall'Antonia, F. Frankenberger, P. Gawelda, W. Gelisio, L. Han, H. Huang, X. Jiang, Y. Kloos, M. Kluyver, T. Knoll, M. Kubicek, K. Bermudez Macias, I.J. Schulz, J. Turkot, O. Uemura, Y. Valerio, Tags: X-ray free-electron laser XES WAXS XRD utrafast science pump – probe liquid jets beamlines Source Type: research
The new small-angle X-ray scattering beamline for materials research at PETRA III: SAXSMAT beamline P62
The SAXSMAT beamline P62 (Small-Angle X-ray Scattering beamline for Materials Research) is a new beamline at the high-energy storage ring PETRA III at DESY. This beamline is dedicated to combined small- and wide-angle X-ray scattering (SAXS/WAXS) techniques for both soft and hard condensed matter systems. It works mainly in transmission geometry. The beamline covers an energy range from 3.5 keV to 35.0 keV, which fulfills the requirements of the user community to perform anomalous scattering experiments. Mirrors are used to reduce the intensity of higher harmonics. Furthermore, the mirrors and 2D compound refra...
Source: Journal of Synchrotron Radiation - October 20, 2023 Category: Physics Authors: Haas, S. Sun, X. Concei ç ã o, A.L.C. Horbach, J. Pfeffer, S. Tags: SAXS WAXS SAXS tensor tomography SAXS-TT computed tomography anomalous scattering ASAXS SAXS-CT beamlines Source Type: research
Multiplexed emitting system for an energy-recovery-linac-based coherent light source
Recently, a novel approach has been proposed to produce ultrashort, fully coherent high-repetition-rate EUV and X-ray radiation by combining an energy recovery linac (ERL) with the angular-dispersion-induced microbunching methodology. It is critical to maintain microbunching when the beam passes through bending magnets between the undulators, which results in difficulties supporting multiple beamlines. In this paper, the design of a multiplexed emitting system consisting of multi-bend achromats, matching sections and radiators to facilitate the multi-beamline operation is presented. Theoretical analysis and numerical simul...
Source: Journal of Synchrotron Radiation - October 19, 2023 Category: Physics Authors: Cao, L. Liu, J. Wang, Z. Huang, D. Feng, C. Zhao, Z. Tags: energy recover linac multi-beamline operation coherent radiation angular-dispersion-induced microbunching multi-bend achromat research papers Source Type: research
Improved precision in As speciation analysis with HERFD-XANES at the As K-edge: the case of As speciation in mine waste. Corrigendum
The name of an author in the article by Saurette et al. (2022) [J. Synchrotron Rad. 29, 1198 – 1208] is corrected. (Source: Journal of Synchrotron Radiation)
Source: Journal of Synchrotron Radiation - October 18, 2023 Category: Physics Authors: Saurette, E.M. Finfrock, Y.Z. Verbuyst, B. Blowes, D.W. McBeth, J.M. Ptacek, C.J. Tags: HERFD-XANES geochemistry mine waste arsenic linear combination fitting addenda and errata Source Type: research
Correction and integration of solid-angle data from the azimuthally resolving 2D detector at ID06-LVP, ESRF
The unique diffraction geometry of ESRF beamline ID06-LVP offers continuous static 2D or azimuthally resolving data collections over all accessible solid angles available to the tooling geometry. The system is built around a rotating custom-built Pilatus3 CdTe 900k-W detector from Dectris, in a configuration equivalent to three butted 300k devices. As a non-standard geometry, here the method of alignment, correction and subsequent integration for any data collected over all solid angles accessible, or over any azimuthal range contained therein, are provided and illustrated by parameterizing and extending existing pyFAI rou...
Source: Journal of Synchrotron Radiation - October 17, 2023 Category: Physics Authors: Crichton, W.A. Kieffer, J. Wattecamps, P. Valls, V. Berruyer, G. Ruat, M. Favre-Nicolin, V. Tags: diffraction detector beamline high pressure extreme conditions beamlines Source Type: research
The emergence of super-resolution beyond the probe size in scanning 3DXRD microscopy
The spatial resolution in scanning-based two-dimensional microscopy is normally limited by the size of the probe, thereby a smaller probe is a prerequisite for enhancing the spatial resolution. For three-dimensional microscopy that combines translation and rotation motions of a specimen, however, complex trajectories of the probe highly overlap in the specimen, which could change the postulate above. Here, the spatial resolution achieved in scanning three-dimensional X-ray diffraction (s3DXRD) microscopy is investigated. In this method, the most appropriate orientation of the pixel in the specimen coordinate is selected by...
Source: Journal of Synchrotron Radiation - October 17, 2023 Category: Physics Authors: Kim, J. Hayashi, Y. Yabashi, M. Tags: scanning 3DXRD super resolution beam trajectory research papers Source Type: research
