pyXPCSviewer: an open-source interactive tool for X-ray photon correlation spectroscopy visualization and analysis
pyXPCSviewer, a Python-based graphical user interface that is deployed at beamline 8-ID-I of the Advanced Photon Source for interactive visualization of XPCS results, is introduced. pyXPCSviewer parses rich X-ray photon correlation spectroscopy (XPCS) results into independent PyQt widgets that are both interactive and easy to maintain. pyXPCSviewer is open-source and is open to customization by the XPCS community for ingestion of diversified data structures and inclusion of novel XPCS techniques, both of which are growing demands particularly with the dawn of near-diffraction-limited synchrotron sources and their dedicated...
Source: Journal of Synchrotron Radiation - June 7, 2022 Category: Physics Authors: Chu, M. Li, J. Zhang, Q. Jiang, Z. Dufresne, E.M. Sandy, A. Narayanan, S. Schwarz, N. Tags: X-ray photon correlation spectroscopy synchrotron visualization GUI Python computer programs Source Type: research
SyncMRT: a solution to image-guided synchrotron radiotherapy for quality assurance and pre-clinical trials
In this work, a new image guidance system and protocols for delivering image-guided radiotherapy (IGRT) on the Imaging and Medical Beamline (IMBL) at the ANSTO Australian Synchrotron are introduced. The image guidance methods used and the resulting accuracy of tumour alignment in in vivo experiments are often under-reported. Image guidance tasks are often complex, time-consuming and prone to errors. If unchecked, they may result in potential mis-treatments. We introduce SyncMRT, a software package that provides a simple, image guidance tool-kit for aligning samples to the synchrotron beam. We have demonstrated sub-mill...
Source: Journal of Synchrotron Radiation - June 7, 2022 Category: Physics Authors: Barnes, M.J. Paino, J. Day, L.R. Butler, D. H ä usermann, D. Pelliccia, D. Crosbie, J.C. Tags: image guidance radiation therapy pre-clinical synchrotron research papers Source Type: research
Emergence of the first XAFS/XRF beamline in the Middle East: providing studies of elements and their atomic/electronic structure in pluridisciplinary research fields
XAFS/XRF is a general-purpose absorption spectroscopy beamline at the Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME), Jordan. Herein, its optical layout is presented along with its powerful capabilities in collecting absorption and fluorescence spectra within a wide energy range (4.7 – 30 keV). The beamline is equipped with a conventional fixed-exit double-crystal monochromator that allows the collection of an X-ray absorption spectrum within a few minutes in step-by-step mode. An on-the-fly scanning mode will be implemented shortly where the acquisition time will be reduced t...
Source: Journal of Synchrotron Radiation - May 26, 2022 Category: Physics Authors: Harfouche, M. Abdellatief, M. Momani, Y. Abbadi, A. Al Najdawi, M. Al Zoubi, M. Aljamal, B. Matalgah, S. Khan, L.U. Lausi, A. Paolucci, G. Tags: SESAME synchrotron XRF XAS XAFS EXAFS XANES structure optics monochromator catalysis cultural heritage materials beamlines Source Type: research
The Inner Shell Spectroscopy beamline at NSLS-II: a facility for in situ and operando X-ray absorption spectroscopy for materials research
The Inner Shell Spectroscopy (ISS) beamline on the 8-ID station at the National Synchrotron Light Source II (NSLS-II), Upton, NY, USA, is a high-throughput X-ray absorption spectroscopy beamline designed for in situ, operando, and time-resolved material characterization using high monochromatic flux and scanning speed. This contribution discusses the technical specifications of the beamline in terms of optics, heat load management, monochromator motion control, and data acquisition and processing. Results of the beamline tests demonstrating the quality of the data obtainable on the instrument, possible energy scanning spee...
Source: Journal of Synchrotron Radiation - May 26, 2022 Category: Physics Authors: Leshchev, D. Rakitin, M. Luvizotto, B. Kadyrov, R. Ravel, B. Attenkofer, K. Stavitski, E. Tags: beamline monochromator X-ray absorption spectroscopy beamlines Source Type: research
Study of interface reaction in a B4C/Cr mirror at elevated temperature using soft X-ray reflectivity
Boron carbide is a prominent material for high-brilliance synchrotron optics as it remains stable up to very high temperatures. The present study shows a significant change taking place at 550 ° C in the buried interface region formed between the Cr adhesive layer and the native oxide layer present on the silicon substrate. An in situ annealing study is carried out at the Indus-1 Reflectivity beamline from room temperature to 550 ° C (100 ° C steps). The studied sample is a mirror-like boron carbide thin film of 400 Å thickness deposited with an adhesive layer of 20 Å Cr on a silicon substrate. The correspondi...
Source: Journal of Synchrotron Radiation - May 25, 2022 Category: Physics Authors: Modi, M.H. Gupta, S. Yadav, P.K. Gupta, R. Bose, A. Mukherjee, C. Jonnard, P. Idir, M. Tags: boron carbide X-ray mirrors synchrotron radiation soft X-ray reflectivity X-ray optics research papers Source Type: research
3D-printed SAXS chamber for controlled in situ dialysis and optical characterization
3D printing changes the scope of how samples can be mounted for small-angle X-ray scattering (SAXS). In this paper a 3D-printed X-ray chamber, which allows for in situ exchange of buffer and in situ optical transmission spectroscopy, is presented. The chamber is made of cyclic olefin copolymers (COC), including COC X-ray windows providing ultra-low SAXS background. The design integrates a membrane insert for in situ dialysis of the 100 µ l sample volume against a reservoir, which enables measurements of the same sample under multiple conditions using an in-house X-ray setup equipped with a 17.4 keV mol...
Source: Journal of Synchrotron Radiation - May 25, 2022 Category: Physics Authors: Ehm, T. Philipp, J. Barkey, M. Ober, M. Brinkop, A.T. Simml, D. von Westphalen, M. Nickel, B. Beck, R. R ä dler, J.O. Tags: cyclic olefin copolymer 3D printing in situ dialysis in-house measurements small-angle X-ray scattering research papers Source Type: research
Analytic descriptions of parabolic X-ray mirrors
On X-ray beamlines and telescopes, glancing-incidence mirrors with parabolic profiles are used to collimate, focus, and collect light. Here, analytic descriptions for paraboloidal, plane-parabolic, and parabolic cylindrical mirrors in several congruent geometries that are commonly used in fabrication, metrology, and modeling are provided. The exact expressions are derived directly from Fermat's principle, without coordinate transformations, in several mirror-centered coordinate systems, including one with the surface tangent to the central point of intersection. Coefficients for a sixth-order polynomial series approximatio...
Source: Journal of Synchrotron Radiation - May 25, 2022 Category: Physics Authors: Goldberg, K.A. Tags: X-ray mirror parabolic collimator focusing research papers Source Type: research
The COMIX polarimeter: a compact device for XUV polarization analysis
We report on the characterization of a novel extreme-ultraviolet polarimeter based on conical mirrors to simultaneously detect all the components of the electric field vector for extreme-ultraviolet radiation in the 45 – 90 eV energy range. The device has been characterized using a variable polarization source at the Elettra synchrotron, showing good performance in the ability to determine the radiation polarization. Furthermore, as a possible application of the device, Faraday spectroscopy and time-resolved experiments have been performed at the Fe M2,3-edge on an FeGd ferrimagnetic thin film using the FERMI free...
Source: Journal of Synchrotron Radiation - May 19, 2022 Category: Physics Authors: Pancaldi, M. Str ü ber, C. Friedrich, B. Pedersoli, E. De Angelis, D. Nikolov, I.P. Manfredda, M. Foglia, L. Yulin, S. Spezzani, C. Sacchi, M. Eisebitt, S. Korff Schmising, C. von Capotondi, F. Tags: extreme-ultraviolet polarimetry free-electron laser pump – probe experiments magnetic materials research papers Source Type: research
The time-resolved atomic, molecular and optical science instrument at the Linac Coherent Light Source
The newly constructed time-resolved atomic, molecular and optical science instrument (TMO) is configured to take full advantage of both linear accelerators at SLAC National Accelerator Laboratory, the copper accelerator operating at a repetition rate of 120 Hz providing high per-pulse energy as well as the superconducting accelerator operating at a repetition rate of about 1 MHz providing high average intensity. Both accelerators power a soft X-ray free-electron laser with the new variable-gap undulator section. With this flexible light source, TMO supports many experimental techniques not previously available at L...
Source: Journal of Synchrotron Radiation - May 19, 2022 Category: Physics Authors: Walter, P. Osipov, T. Lin, M.-F. Cryan, J. Driver, T. Kamalov, A. Marinelli, A. Robinson, J. Seaberg, M.H. Wolf, T.J.A. Aldrich, J. Brown, N. Champenois, E.G. Cheng, X. Cocco, D. Conder, A. Curiel, I. Egger, A. Glownia, J.M. Heimann, P. Holmes, M. Johnson Tags: LCLS-II FEL AMO attosecond research papers Source Type: research
Modification of the Langendorff system of the isolated beating heart for experimental radiotherapy at a synchrotron: 4000 Gy in a heart beat
Microbeam radiotherapy could help to cure malignant tumours which are currently still considered therapy-resistant. With an irradiation target in the thoracic cavity, the heart would be one of the most important organs at risk. To assess the acute adverse effects of microbeam irradiation in the heart, a powerful ex vivo tool was created by combining the Langendorff model of the isolated beating mammalian heart with X-Tream dosimetry. In a first pilot experiment conducted at the Biomedical and Imaging Beamline of the Australian Synchrotron, the system was tested at a microbeam peak dose approximately ten times higher than t...
Source: Journal of Synchrotron Radiation - May 18, 2022 Category: Physics Authors: Sch ü ltke, E. Lerch, M. Kirschstein, T. Lange, F. Porath, K. Fiedler, S. Davis, J. Paino, J. Engels, E. Barnes, M. Klein, M. Hall, C. H ä usermann, D. Hildebrandt, G. Tags: microbeam irradiation (MBI) Langendorff model of the isolated beating heart organ of risk research papers Source Type: research
Towards performing high-resolution inelastic X-ray scattering measurements at hard X-ray free-electron lasers coupled with energetic laser drivers
High-resolution inelastic X-ray scattering is an established technique in the synchrotron community, used to investigate collective low-frequency responses of materials. When fielded at hard X-ray free-electron lasers (XFELs) and combined with high-intensity laser drivers, it becomes a promising technique for investigating matter at high temperatures and high pressures. This technique gives access to important thermodynamic properties of matter at extreme conditions, such as temperature, material sound speed, and viscosity. The successful realization of this method requires the acquisition of many identical laser-pump/X-ra...
Source: Journal of Synchrotron Radiation - May 18, 2022 Category: Physics Authors: Descamps, A. Ofori-Okai, B.K. Baldwin, J.K. Chen, Z. Fletcher, L.B. Glenzer, S.H. Hartley, N.J. Hasting, J.B. Khaghani, D. Mo, M. Nagler, B. Recoules, V. Redmer, R. Sch ö rner, M. Sun, P. Wang, Y.Q. White, T.G. McBride, E.E. Tags: XFEL high-resolution inelastic X-ray scattering extreme conditions thermal diffuse scattering research papers Source Type: research
An automated approach to the alignment of compound refractive lenses
Compound refractive lenses (CRLs) are established X-ray focusing optics, and are used to focus the beam or image the sample in many beamlines at X-ray facilities. While CRLs are quite established, the stack of single lens elements affords a very small numerical aperture because of the thick lens profile, making them far more difficult to align than classical optical lenses that obey the thin-lens approximation. This means that the alignment must be very precise and is highly sensitive to changes to the incident beam, often requiring regular readjustments. Some groups circumvent the full realignment procedure by using engin...
Source: Journal of Synchrotron Radiation - May 18, 2022 Category: Physics Authors: Breckling, S. Kozioziemski, B. Dresselhaus-Marais, L. Gonzalez, A. Williams, A. Simons, H. Chow, P. Howard, M. Tags: compound refractive lens alignment optimization beamline optics research papers Source Type: research
Serial macromolecular crystallography at ALBA Synchrotron Light Source. Erratum
A revised version of Table 2 of Martin-Garcia et al. [J. Synchrotron Rad. (2022). 29, 896 – 907] is provided. (Source: Journal of Synchrotron Radiation)
Source: Journal of Synchrotron Radiation - May 16, 2022 Category: Physics Authors: Martin-Garcia, J.M. Botha, S. Hu, H. Jernigan, R. Castellv í , A. Lisova, S. Gil, F. Calisto, B. Crespo, I. Roy-Chowdhury, S. Grieco, A. Ketawala, G. Weierstall, U. Spence, J. Fromme, P. Zatsepin, N. Boer, D.R. Carpena, X. Tags: serial synchrotron crystallography viscous jet LCP microcrystal ALBA XALOC addenda and errata Source Type: research
Quantifying signal quality in scanning transmission X-ray microscopy
While the general effects of experimental conditions such as photon flux and sample thickness on the quality of data acquired by scanning transmission X-ray microscopy (STXM) are widely known at a basic level, the specific details are rarely discussed. This leaves the community open to forming misconceptions that can lead to poor decisions in the design and execution of STXM measurements. A formal treatment of the uncertainty and distortions of transmission signals (due to dark counts, higher-order photons and poor spatial or spectral resolution) is presented here to provide a rational basis for the pursuit of maximizing d...
Source: Journal of Synchrotron Radiation - May 16, 2022 Category: Physics Authors: Watts, B. Finizio, S. Raabe, J. Tags: transmission STXM uncertainty research papers Source Type: research
Implementing and evaluating far-field 3D X-ray diffraction at the I12 JEEP beamline, Diamond Light Source
Three-dimensional X-ray diffraction (3DXRD) is shown to be feasible at the I12 Joint Engineering, Environmental and Processing (JEEP) beamline of Diamond Light Source. As a demonstration, a microstructually simple low-carbon ferritic steel was studied in a highly textured and annealed state. A processing pipeline suited to this beamline was created, using software already established in the 3DXRD user community, enabling grain centre-of-mass positions, orientations and strain tensor elements to be determined. Orientations, with texture measurements independently validated from electron backscatter diffraction (EBSD) data, ...
Source: Journal of Synchrotron Radiation - May 16, 2022 Category: Physics Authors: Ball, J.A.D. Kareer, A. Magdysyuk, O.V. Michalik, S. Vrettou, A. Parkes, N. Connolley, T. Collins, D.M. Tags: diffraction 3DXRD EBSD microstructure texture research papers Source Type: research
