Journal of Synchrotron Radiation最新文献_第3页

An automated and robust method for modelling X-ray beamlines with plane grating monochromators. 用平面光栅单色仪模拟x射线光束线的一种自动化、鲁棒的方法。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-07-01 Epub Date: 2025-05-13 DOI: 10.1107/S1600577525003200

Patrick Yuheng Wang, Murilo Bazan da Silva, Georg Held, Hongchang Wang, Kawal Sawhney, Andrew C Walters

引用次数: 0

An in situ visualization system using synchrotron white X-rays to investigate the solidification behaviors of metallic materials. 利用同步白x射线原位可视化系统研究金属材料的凝固行为。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-07-01 Epub Date: 2025-05-23 DOI: 10.1107/S1600577525003716

Hyeong Uk Mo, Min Woo Kim, Chang Hun Lee, Jina Kim, Hyun Wook Park, Jae Hong Lim, Chang Hee Yim, Cheol Hee Nam, Jong Hyun Kim, Ho Jae Kwak

{"title":"An in situ visualization system using synchrotron white X-rays to investigate the solidification behaviors of metallic materials.","authors":"Hyeong Uk Mo, Min Woo Kim, Chang Hun Lee, Jina Kim, Hyun Wook Park, Jae Hong Lim, Chang Hee Yim, Cheol Hee Nam, Jong Hyun Kim, Ho Jae Kwak","doi":"10.1107/S1600577525003716","DOIUrl":"10.1107/S1600577525003716","url":null,"abstract":"An advanced imaging platform has been developed to study the microstructural solidification behaviors of metals using synchrotron white X-rays. This system provides submicrometre effective pixel size and a frame rate of thousands per second, enabling high-resolution and high-speed imaging. The system functions independently, facilitating convenient alignment, magnification adjustments, and precise control of the region of interest. Additionally, we designed a specialized furnace for in situ characterization of microstructures during melting and solidification of metallic specimens at high temperature. This furnace meets stringent optical requirements and allows for finely adjusted specimen temperature gradients through the configuration of heating elements and individual current control. The furnace supports stable high-temperature experiments under vacuum, in an argon atmosphere, and at ambient pressure. Using this advanced imaging system, we investigated real-time in situ solidification phenomena of various metallic materials and other solidifying systems such as silicon. We performed image analysis to quantitatively assess microstructural changes, calculate dendritic spacing and determine liquid fractions.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"1028-1035"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12236257/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A cross-correlator-based timing tool for FemtoMAX. 基于互相关器的FemtoMAX定时工具。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-07-01 Epub Date: 2025-06-02 DOI: 10.1107/S1600577525003479

D Kroon, E Nilsson, B Ahn, M Bertelli, R Calarco, I Clementsson, S De Simone, J C Ekström, A Jurgilaitis, M Longo, V T Pham, J Larsson

{"title":"A cross-correlator-based timing tool for FemtoMAX.","authors":"D Kroon, E Nilsson, B Ahn, M Bertelli, R Calarco, I Clementsson, S De Simone, J C Ekström, A Jurgilaitis, M Longo, V T Pham, J Larsson","doi":"10.1107/S1600577525003479","DOIUrl":"10.1107/S1600577525003479","url":null,"abstract":"We report on the commissioning of an ultrafast timing diagnostic for measuring a time-offset signal between two different synchronized ultrashort light pulses. The method is based on sum-frequency generation in a nonlinear crystal. The setup is similar to an auto/cross-correlator setup. In this case, one of the beams is a relatively weak diagnostic beam of visible light from a bending magnet at FemtoMAX (106 photons pulse-1 in a 0.2 mm high and 5 mm wide beam) while the other is a relatively intense laser beam (200 µJ pulse-1) derived from the same laser that is used to pump the sample in pump/probe experiments. This enables online monitoring of the relative timing of a linear accelerator-based, short-pulse, hard X-ray source and a synchronized visible laser. We show that for a <50 fs full width at half-maximum (FWHM) light pulse from the accelerator and a 50 fs (FWHM) long laser pulse, we can determine the relative timing of the two pulses with an accuracy below 30 fs in a time interval of 4 ps. The advantages and limitations of the method are discussed.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"1052-1058"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12236248/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144209991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A versatile framework for attitude tuning of beamlines at light source facilities. 光源设施中光束姿态调整的通用框架。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-07-01 Epub Date: 2025-06-12 DOI: 10.1107/S1600577525003960

Peng Cheng Li, Xiao Xue Bi, Zhen Zhang, Xiao Bao Deng, Chun Li, Li Wen Wang, Gong Fa Liu, Yi Zhang, Ai Yu Zhou, Yu Liu

{"title":"A versatile framework for attitude tuning of beamlines at light source facilities.","authors":"Peng Cheng Li, Xiao Xue Bi, Zhen Zhang, Xiao Bao Deng, Chun Li, Li Wen Wang, Gong Fa Liu, Yi Zhang, Ai Yu Zhou, Yu Liu","doi":"10.1107/S1600577525003960","DOIUrl":"10.1107/S1600577525003960","url":null,"abstract":"Aside from regular beamline experiments at light sources, the preparation steps before these experiments are also worthy of systematic consideration in terms of automation; a representative category in these steps is attitude tuning, which typically appears in contexts like beam focusing, sample alignment etc. With the goal of saving time and human effort in both writing and using such code, a Mamba-based attitude-tuning framework is created. It supports flexible input/output ports, easy integration of diverse evaluation functions and free selection of optimization algorithms. With the help of Mamba's infrastructure, machine learning (ML) and artificial intelligence (AI) technologies can also be readily integrated. The tuning of a polycapillary lens and of an X-ray emission spectrometer are given as examples for the general use of this framework, featuring powerful command-line interfaces (CLIs) and friendly graphical user interfaces (GUIs) that allow comfortable human-in-the-loop control. The tuning of a Raman spectrometer demonstrates more specialized use of the framework with customized optimization algorithms. With similar applications in mind, this framework is estimated to be capable of fulfilling most attitude-tuning needs. Also reported is a virtual-beamline mechanism based on easily customisable simulated detectors and motors, which facilitates both testing for developers and training for users, as well as the encapsulation of digital twins.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"924-933"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12236240/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144276288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hyper-resolution in X-ray emission spectroscopy: integrating extended-range high energy resolution fluorescence detection and multiple-crystal spectrometry with advanced binary data splicing. x射线发射光谱的超分辨率：将扩展范围高能量分辨率荧光检测和多晶光谱与先进的二进制数据拼接相结合。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-07-01 Epub Date: 2025-06-17 DOI: 10.1107/S1600577525004084

Ramesh Rijal, Jack Stephens, Daniel Sier, Nicholas T T Tran, Truong V B Nguyen, Jonathan W Dean, Pierce Bowman, Minh Dao, Paul Di Pasquale, Tony Kirk, Chanh Q Tran, Shusaku Hayama, Matteo Aramini, Nitya Ramanan, Sofia Diaz-Moreno, Christopher T Chantler

{"title":"Hyper-resolution in X-ray emission spectroscopy: integrating extended-range high energy resolution fluorescence detection and multiple-crystal spectrometry with advanced binary data splicing.","authors":"Ramesh Rijal, Jack Stephens, Daniel Sier, Nicholas T T Tran, Truong V B Nguyen, Jonathan W Dean, Pierce Bowman, Minh Dao, Paul Di Pasquale, Tony Kirk, Chanh Q Tran, Shusaku Hayama, Matteo Aramini, Nitya Ramanan, Sofia Diaz-Moreno, Christopher T Chantler","doi":"10.1107/S1600577525004084","DOIUrl":"10.1107/S1600577525004084","url":null,"abstract":"This study of manganese (Mn, Z = 25) introduces a novel combination of extended-range high energy resolution fluorescence detection (XR-HERFD), multiple-crystal spectrometers and advanced binary data splicing techniques to address challenges in X-ray emission spectroscopy. XR-HERFD enhances spectral precision by utilizing high-resolution crystal analysers and optimized detector configurations. The systematic application of these methods using multiple Bragg crystal analysers at Diamond Light Source has led to substantial improvements in data quality. Simultaneously, advanced binary data splicing integrates multiple datasets to correct distortions and improve resolution, resulting in sharper spectral features. Our results show a significant increase in peak counts and a notable reduction in full width at half-maximum (FWHM), with peak amplitudes increasing by 83% and resolution improving by 46%. These developments provide greater detail for X-ray absorption or emission spectra, offering valuable insights into complex materials, and permitting advances and breakthroughs in atomic relativistic quantum mechanics, chemical sensitivity of atomic transitions and modelling of solid-state effects.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"994-1009"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12236247/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proposal of a vertically polarized superconducting multipole wiggler using Nb₃Sn coils. 采用Nb3Sn线圈的垂直极化超导多极摆动器的设计。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-07-01 Epub Date: 2025-06-17 DOI: 10.1107/S1600577525004382

Hirotoshi Saito, Kimichika Tsuchiya, Chikaori Mitsuda, Kentaro Harada, Yoshito Shimosaki, Takashi Obina

{"title":"Proposal of a vertically polarized superconducting multipole wiggler using Nb3Sn coils.","authors":"Hirotoshi Saito, Kimichika Tsuchiya, Chikaori Mitsuda, Kentaro Harada, Yoshito Shimosaki, Takashi Obina","doi":"10.1107/S1600577525004382","DOIUrl":"10.1107/S1600577525004382","url":null,"abstract":"We propose a vertically polarized superconducting multipole wiggler (V-SC-MPW) that enables the use of vertically polarized hard X-rays with minimal impact on beam quality. Vertical polarization facilitates unique experimental setups by allowing horizontal arrangement of optical equipment, which is difficult to realize with horizontally polarized X-rays. However, significant emittance growth has prevented the adoption of such vertically polarized, high-field devices in third-generation light sources. To address this challenge, the V-SC-MPW employs a short-period design. By utilizing Nb3Sn superconducting wires, which have a critical current density approximately 10 times higher than that of conventional NbTi, the period length can be shortened while maintaining the required magnetic field, thereby reducing the beam orbit amplitude and the resulting emittance growth. A case study that considers the introduction of the V-SC-MPW into PF-HLS, a future light source planned at KEK, shows that, with a horizontal magnetic gap of 30 mm, a design featuring a peak magnetic field of 2.44 T, a period length of 85 mm and an orbit amplitude of 54 µm at a beam energy of 2.5 GeV is feasible. This seven-period V-SC-MPW, assumed to be installed in a non-achromatic straight section of PF-HLS, is estimated to result in emittance growths of 15.6 pm rad horizontally and 1.0 pm rad vertically. These minimal impacts indicate that the short-period V-SC-MPW is a promising insertion device for utilizing vertically polarized hard X-rays in modern low-emittance rings with intermediate beam energies.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"934-941"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12236245/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing resolution with the extended image restoration method: strain field energy and correlation length analysis in Bragg coherent X-ray diffraction imaging. 扩展图像恢复法提高分辨率：布拉格相干x射线衍射成像的应变场能和相关长度分析。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-05-01 Epub Date: 2025-04-25 DOI: 10.1107/S1600577525002942

Kyuseok Yun, Sungwook Choi, Hyunjung Kim

{"title":"Enhancing resolution with the extended image restoration method: strain field energy and correlation length analysis in Bragg coherent X-ray diffraction imaging.","authors":"Kyuseok Yun, Sungwook Choi, Hyunjung Kim","doi":"10.1107/S1600577525002942","DOIUrl":"https://doi.org/10.1107/S1600577525002942","url":null,"abstract":"Understanding atomic-level imperfections is crucial in various technological applications. Bragg coherent X-ray diffraction imaging (BCDI) enables non-destructive, three-dimensional imaging of those materials under in situ and operando conditions but has limited spatial resolution. This limitation hinders accurate calculations of physical quantities, e.g. strain field energy and strain correlation lengths. In this study, we introduce the extended image restoration (ExImRes) method, which infers enhanced resolution images based primarily on the process of averaging and combining multiple datasets obtained by restricting the original measured datasets through binning or cropping. We apply ExImRes to two nanocrystal examples-a chiral gold nanoparticle and a platinum nanoparticle-with an improved spatial resolution that allowed us to obtain precise calculation results of strain field energy and the correlation lengths of atomic deformations. The enhanced images reveal detailed lattice-scale information previously inaccessible through traditional BCDI methods. Our findings advance ExImRes to obtain high-resolution analysis in imaging techniques that involve reciprocal to real space transformations and understand underlying phenomena in materials science.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":"32 Pt 3","pages":"743-749"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12067331/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144051204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global cross-database search system for X-ray absorption spectra. x射线吸收光谱全球跨数据库检索系统。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-05-01 Epub Date: 2025-04-11 DOI: 10.1107/S1600577525002206

Masashi Ishii, Asahiko Matsuda, Koichi Sakamoto, Shohei Yamashita, Yasuhiro Niwa, Yasuhiro Inada

引用次数: 0

Machine learning for orbit steering in the presence of nonlinearities. 非线性情况下轨道转向的机器学习。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-05-01 Epub Date: 2025-04-11 DOI: 10.1107/S1600577525002334

Simona Bettoni, Jonas Kallestrup, Güney Erin Tekin, Michael Böge, Romana Boiger

{"title":"Machine learning for orbit steering in the presence of nonlinearities.","authors":"Simona Bettoni, Jonas Kallestrup, Güney Erin Tekin, Michael Böge, Romana Boiger","doi":"10.1107/S1600577525002334","DOIUrl":"https://doi.org/10.1107/S1600577525002334","url":null,"abstract":"Circular particle accelerators require precise beam orbit correction to maintain the beam's trajectory close to the ideal `golden orbit', which is centered within all magnetic elements of the ring, except for slight deviations due to installed experiments. Traditionally, this correction is achieved using methodologies based on the response matrix (RM). The RM elements remain constant when the accelerator's lattice includes solely linear elements or when a linear approximation is valid for small perturbations, allowing for the calculation of corrector strengths to steer the beam. However, most circular accelerators contain nonlinear magnets, leading to variations in RM elements when the beam experiences large perturbations, rendering traditional methods less effective and necessitating multiple iterations for convergence. To address these challenges, a machine learning (ML)-based approach is explored for beam orbit correction. This approach, applied to synchrotron SLS 2.0 under construction at the Paul Scherrer Institut, is evaluated against and in combination with the standard RM-based method under various conditions. A possible limitation of ML for this application is the potential change in the dimensionality of the ML model after optimization, which could affect performance. A solution to this issue is proposed, improving the robustness and appeal of the ML-based method for efficient beam orbit steering.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":"32 Pt 3","pages":"609-621"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12067324/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143988659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining the optimal choice of attenuation filters and propagation distance for polychromatic phase-contrast micro-computed tomography of a multi-material electromotor using synchrotron radiation. 利用同步辐射确定多材料电动机多色相衬显微计算机断层扫描衰减滤波器和传播距离的最佳选择。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2025-05-01 Epub Date: 2025-04-23 DOI: 10.1107/S1600577525002814

Matthias Diez, Simon Zabler

{"title":"Determining the optimal choice of attenuation filters and propagation distance for polychromatic phase-contrast micro-computed tomography of a multi-material electromotor using synchrotron radiation.","authors":"Matthias Diez, Simon Zabler","doi":"10.1107/S1600577525002814","DOIUrl":"https://doi.org/10.1107/S1600577525002814","url":null,"abstract":"Optimizing phase-contrast micro-computed tomography (µCT) for a given object is not trivial if the radiation is polychromatic and the object multi-material. This study demonstrates how an optimal combination of propagation distance and mean energy (set by attenuation filters) may be derived for such an object (an electromotor scanned on beamline BM18 at ESRF in Grenoble, France). In addition to appropriate image quality metrics, it is mandatory to define a task. In that respect, raising Emean from 100 keV to 164 keV mitigates beam hardening by metal parts, yet raising Emean further to 230 keV deteriorates CNR2 (where CNR is contrast-to-noise ratio) due to higher image noise. Propagation distances between d = 2 m and 25.3 m are evaluated crosswise with energy. While longer propagation distances generally yield higher CNR2, shorter distances appear favorable when discerning plastic near metal parts. SNR2 (where SNR is signal-to-noise ratio) power spectra and modulation transfer (MTF) are evaluated independently from two-dimensional projections supporting volume image analysis for which image sharpness depends strongly on the digital filters (Paganin and Wiener) which are applied along with filtered back-projection. In summary, optimizing synchrotron µCT scans remains a very complex task which differs from object to object. A physically accurate model of the complete imaging process may not only allow for optimization by simulation but also ideally improve CT image reconstruction in the near future.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":"32 Pt 3","pages":"731-742"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12067323/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144035872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0