Journal of Synchrotron Radiation最新文献_第3页

A compact gas attenuator for the SwissFEL ATHOS beamline realized using additive manufacturing. 采用增材制造技术实现了瑞士电子激光器ATHOS光束线的紧凑型气体衰减器。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-07-01 DOI: 10.1107/S1600577523004241

Claude Pradervand, Colette Rosenberg, Hans Jörg Eckerlin, Kirsten Schnorr, Andre Al Haddad, Peter Wiegand, Christoph Hess, Nazareno Gaiffi, Luc Patthey

引用次数: 1

Online absolute calibration of fast FEL pulse energy measurements. 快速FEL脉冲能量测量的在线绝对校准。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-05-01 DOI: 10.1107/S1600577523001133

Pavle Juranić, Arturo Alarcon, Rasmus Ischebeck

引用次数: 0

High-efficiency focusing and imaging by dielectric kinoform zone plate lenses with soft X-rays. 软x射线介质型带板透镜的高效聚焦与成像。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-03-01 DOI: 10.1107/S1600577522012115

Xujie Tong, Yifang Chen, Zijian Xu, Yijie Li, Zhenjiang Xing, Chengyang Mu, Jun Zhao, Xiangjun Zhen, Chengwen Mao, Renzhong Tai

{"title":"High-efficiency focusing and imaging by dielectric kinoform zone plate lenses with soft X-rays.","authors":"Xujie Tong, Yifang Chen, Zijian Xu, Yijie Li, Zhenjiang Xing, Chengyang Mu, Jun Zhao, Xiangjun Zhen, Chengwen Mao, Renzhong Tai","doi":"10.1107/S1600577522012115","DOIUrl":"https://doi.org/10.1107/S1600577522012115","url":null,"abstract":"With fast advances in enhancing the focusing/imaging resolution of Fresnel zone plate lenses toward sub-10 nm, low diffraction efficiency in connection with their rectangular zone shape still remains a big issue in both soft and hard X-ray microscopy. In hard X-ray optics, encouraging progress has recently been reported in our earlier attempts of high focusing efficiency by 3D kinoform shaped metallic zone plates, formed by greyscale electron beam lithography. This paper addresses our efforts towards high focusing/imaging efficiency by developing a novel dielectric kinoform zone plate lens for soft X-rays. The effects of the zone materials and zone shapes on the focusing/imaging quality were first theoretically investigated by a modified thin-grating-approximation method, revealing superior efficiencies of dielectric kinoform zone plates over rectangular ones in metals. Optical characterizations of replicated dielectric kinoform zone plates by greyscale electron beam lithography demonstrate a focusing efficiency of 15.5% with a resolution of 110 nm in the water window of X-rays. Apart from high efficiency, the novel kinoform zone plate lenses developed in this work exhibit significant advantages over conventional zone plates, i.e. simplified process, low cost and no need for a beamstop.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"30 Pt 2","pages":"319-326"},"PeriodicalIF":2.5,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10000800/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9083897","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

Hard X-ray full-field nanoimaging using a direct photon-counting detector. 使用直接光子计数探测器进行硬 X 射线全场纳米成像。

IF 2.4 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-03-01 Epub Date: 2023-02-01 DOI: 10.1107/S1600577522012103

Silja Flenner, Johannes Hagemann, Felix Wittwer, Elena Longo, Adam Kubec, André Rothkirch, Christian David, Martin Müller, Imke Greving

{"title":"Hard X-ray full-field nanoimaging using a direct photon-counting detector.","authors":"Silja Flenner, Johannes Hagemann, Felix Wittwer, Elena Longo, Adam Kubec, André Rothkirch, Christian David, Martin Müller, Imke Greving","doi":"10.1107/S1600577522012103","DOIUrl":"10.1107/S1600577522012103","url":null,"abstract":"Full-field X-ray nanoimaging is a widely used tool in a broad range of scientific areas. In particular, for low-absorbing biological or medical samples, phase contrast methods have to be considered. Three well established phase contrast methods at the nanoscale are transmission X-ray microscopy with Zernike phase contrast, near-field holography and near-field ptychography. The high spatial resolution, however, often comes with the drawback of a lower signal-to-noise ratio and significantly longer scan times, compared with microimaging. In order to tackle these challenges a single-photon-counting detector has been implemented at the nanoimaging endstation of the beamline P05 at PETRA III (DESY, Hamburg) operated by Helmholtz-Zentrum Hereon. Thanks to the long sample-to-detector distance available, spatial resolutions of below 100 nm were reached in all three presented nanoimaging techniques. This work shows that a single-photon-counting detector in combination with a long sample-to-detector distance allows one to increase the time resolution for in situ nanoimaging, while keeping a high signal-to-noise level.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"30 Pt 2","pages":"390-399"},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10000802/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9089266","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

MAXPEEM: a spectromicroscopy beamline at MAX IV laboratory. MAXPEEM: MAX IV实验室的光谱显微镜光束线。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-03-01 DOI: 10.1107/S160057752300019X

Yuran Niu, Nikolay Vinogradov, Alexei Preobrajenski, Claudia Struzzi, Brice Sarpi, Lin Zhu, Evangelos Golias, Alexei Zakharov

{"title":"MAXPEEM: a spectromicroscopy beamline at MAX IV laboratory.","authors":"Yuran Niu, Nikolay Vinogradov, Alexei Preobrajenski, Claudia Struzzi, Brice Sarpi, Lin Zhu, Evangelos Golias, Alexei Zakharov","doi":"10.1107/S160057752300019X","DOIUrl":"https://doi.org/10.1107/S160057752300019X","url":null,"abstract":"MAXPEEM, a dedicated photoemission electron microscopy beamline at MAX IV Laboratory, houses a state-of-the-art aberration-corrected spectroscopic photoemission and low-energy electron microscope (AC-SPELEEM). This powerful instrument offers a wide range of complementary techniques providing structural, chemical and magnetic sensitivities with a single-digit nanometre spatial resolution. The beamline can deliver a high photon flux of ≥1015 photons s-1 (0.1% bandwidth)-1 in the range 30-1200 eV with full control of the polarization from an elliptically polarized undulator. The microscope has several features which make it unique from similar instruments. The X-rays from the synchrotron pass through the first beam separator and impinge the surface at normal incidence. The microscope is equipped with an energy analyzer and an aberration corrector which improves both the resolution and the transmission compared with standard microscopes. A new fiber-coupled CMOS camera features an improved modulation transfer function, dynamic range and signal-to-noise ratio compared with the traditional MCP-CCD detection system.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"30 Pt 2","pages":"468-478"},"PeriodicalIF":2.5,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10000796/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9442248","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: 2

FOCUS: fast Monte Carlo approach to coherence of undulator sources. 焦点:快速蒙特卡罗方法的相干波动源。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-01-01 DOI: 10.1107/S1600577522010748

M Siano, G Geloni, B Paroli, D Butti, T Lefèvre, S Mazzoni, G Trad, U Iriso, A A Nosych, L Torino, M A C Potenza

{"title":"FOCUS: fast Monte Carlo approach to coherence of undulator sources.","authors":"M Siano, G Geloni, B Paroli, D Butti, T Lefèvre, S Mazzoni, G Trad, U Iriso, A A Nosych, L Torino, M A C Potenza","doi":"10.1107/S1600577522010748","DOIUrl":"https://doi.org/10.1107/S1600577522010748","url":null,"abstract":"FOCUS (Fast Monte CarlO approach to Coherence of Undulator Sources) is a new GPU-based simulation code to compute the transverse coherence of undulator radiation from ultra-relativistic electrons. The core structure of the code, which is written in the language C++ accelerated with CUDA, combines an analytical description of the emitted electric fields and massively parallel computations on GPUs. The combination is rigorously justified by a statistical description of synchrotron radiation based on a Fourier optics approach. FOCUS is validated by direct comparison with multi-electron Synchrotron Radiation Workshop (SRW) simulations, evidencing a reduction in computation times by up to five orders of magnitude on a consumer laptop. FOCUS is then applied to systematically study the transverse coherence in typical third- and fourth-generation facilities, highlighting peculiar features of undulator sources close to the diffraction limit. FOCUS is aimed at fast evaluation of the transverse coherence of undulator radiation as a function of the electron beam parameters, to support and help prepare more advanced and detailed numerical simulations with traditional codes like SRW.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"30 Pt 1","pages":"217-226"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814064/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10502802","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: 2

A compact-rigid multi-analyser for energy and angle filtering of high-resolution X-ray experiments. Part 2. Efficiency of a single-crystal-comb. 用于高分辨率x射线实验的能量和角度滤波的紧凑刚性多分析仪。第2部分。单晶梳的效率。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-01-01 DOI: 10.1107/S1600577522011250

J L Hodeau, A Prat, N Boudet, N Blanc, S Arnaud, J L Hazemann, E Lahéra, O Proux, M Jacquet, P O Autran, C Dejoie, P Martinetto

{"title":"A compact-rigid multi-analyser for energy and angle filtering of high-resolution X-ray experiments. Part 2. Efficiency of a single-crystal-comb.","authors":"J L Hodeau, A Prat, N Boudet, N Blanc, S Arnaud, J L Hazemann, E Lahéra, O Proux, M Jacquet, P O Autran, C Dejoie, P Martinetto","doi":"10.1107/S1600577522011250","DOIUrl":"https://doi.org/10.1107/S1600577522011250","url":null,"abstract":"Diffraction instruments using filtering by one or several analyser crystals exist since the 1980s and 1990s at synchrotron radiation sources, but, due to its low efficiency, this filtering is little used on laboratory sources. In order to overcome this limitation, the efficiency of a small diffraction filtering multi-analyzer block (MAD block) realized with a `single-crystal-comb' curved on a rigid support is demonstrated here. The geometry of this curved surface is logarithmic spiral and is optimized to allow multi-filtering over a relatively important diffraction angular range and to be also applicable over an X-ray spectral range. The efficiency of such a small rigid-compact MAD block consisting of this single-crystal-comb generating 20-50 Si(111) single-crystal blades, associated with a block of Soller collimators, is demonstrated. The angle between each crystal is 0.1°, so the measurement range of the comb is 2-5°. The geometry of this system has been optimized for operation with a synchrotron X-ray source over an energy range of 22 keV to 46 keV and could be used with laboratory X-ray sources (Ag Kα1, 22.1 keV). This MAD block complements and exploits the qualities of the `photon-counting' detectors which have very low intrinsic noise. Their joint efficacy is supported by powder pattern measurements of a LaB6 reference sample and of several heterogeneous samples of cultural heritage materials, carried out at 22 keV on the D2AM beamline at the ESRF. Their signal-to-noise ratio is excellent (1000/1) and allows the detection thresholds of the measurements (from 3-1% to 0.1%) to detect minor phases in the studies of `real' heterogeneous materials to be drastically improved.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"30 Pt 1","pages":"126-136"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814061/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10559223","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

Fly-scan-oriented motion analyses and upgraded beamline integration architecture for the High-Dynamic Double-Crystal Monochromator at Sirius/LNLS. Sirius/LNLS高动态双晶单色仪的苍蝇扫描定向运动分析和升级的光束线集成架构。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2023-01-01 DOI: 10.1107/S1600577522010724

Renan Ramalho Geraldes, Sergio Augusto Lordano Luiz, João Leandro de Brito Neto, Telles René Silva Soares, Ricardo Donizeth Dos Reis, Guilherme A Calligaris, Gert Witvoet, J P M B Vermeulen

{"title":"Fly-scan-oriented motion analyses and upgraded beamline integration architecture for the High-Dynamic Double-Crystal Monochromator at Sirius/LNLS.","authors":"Renan Ramalho Geraldes, Sergio Augusto Lordano Luiz, João Leandro de Brito Neto, Telles René Silva Soares, Ricardo Donizeth Dos Reis, Guilherme A Calligaris, Gert Witvoet, J P M B Vermeulen","doi":"10.1107/S1600577522010724","DOIUrl":"https://doi.org/10.1107/S1600577522010724","url":null,"abstract":"The High-Dynamic Double-Crystal Monochromator (HD-DCM) is a mechatronic system with unique control-based architecture and deep paradigm changes as compared with traditional beamline monochromators. Aiming at unprecedented inter-crystal positioning stability in vertical-bounce double-crystal monochromators (DCMs) of the order of 10 nrad RMS (1 Hz to 2.5 kHz), and not only in fixed-energy but also in fly-scan operation, it has been developed according to a `first-time right' predictive design approach for hard X-ray beamlines at Sirius, the fourth-generation light source at the Brazilian Synchrotron Light Laboratory (LNLS/CNPEM). This work explores some of the challenges that emerge with this new technology and presents the latest commissioning results that demonstrate the unparallel performances of the HD-DCM at the undulator-based EMA (Extreme Methods of Analysis) beamline at Sirius. With the enabled fast spectroscopy fly-scan possibilities, a new energy-tuning evaluation method, based on wave-propagation simulations, becomes part of a motion-oriented analysis that is carried out to derive the multi-axis non-linear positioning problem, covering not only energy selection and fixed exit in the HD-DCM but also the emission spectrum of an adjustable-phase undulator (APU). The HD-DCM control scheme and its flexible operation modes are described in detail as well. Furthermore, a new integration topology between the HD-DCM and EMA's APU, coming already close to ultimate motion levels, is described and validated.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"30 Pt 1","pages":"90-110"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814047/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10559220","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: 1

ROI-Finder: machine learning to guide region-of-interest scanning for X-ray fluorescence microscopy. ROI-Finder:机器学习引导感兴趣的区域扫描x射线荧光显微镜。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2022-11-01 DOI: 10.1107/S1600577522008876

M A Z Chowdhury, K Ok, Y Luo, Z Liu, S Chen, T V O'Halloran, R Kettimuthu, A Tekawade

{"title":"ROI-Finder: machine learning to guide region-of-interest scanning for X-ray fluorescence microscopy.","authors":"M A Z Chowdhury, K Ok, Y Luo, Z Liu, S Chen, T V O'Halloran, R Kettimuthu, A Tekawade","doi":"10.1107/S1600577522008876","DOIUrl":"https://doi.org/10.1107/S1600577522008876","url":null,"abstract":"The microscopy research at the Bionanoprobe (currently at beamline 9-ID and later 2-ID after APS-U) of Argonne National Laboratory focuses on applying synchrotron X-ray fluorescence (XRF) techniques to obtain trace elemental mappings of cryogenic biological samples to gain insights about their role in critical biological activities. The elemental mappings and the morphological aspects of the biological samples, in this instance, the bacterium Escherichia coli (E. Coli), also serve as label-free biological fingerprints to identify E. coli cells that have been treated differently. The key limitations of achieving good identification performance are the extraction of cells from raw XRF measurements via binary conversion, definition of features, noise floor and proportion of cells treated differently in the measurement. Automating cell extraction from raw XRF measurements across different types of chemical treatment and the implementation of machine-learning models to distinguish cells from the background and their differing treatments are described. Principal components are calculated from domain knowledge specific features and clustered to distinguish healthy and poisoned cells from the background without manual annotation. The cells are ranked via fuzzy clustering to recommend regions of interest for automated experimentation. The effects of dwell time and the amount of data required on the usability of the software are also discussed.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"29 Pt 6","pages":"1495-1503"},"PeriodicalIF":2.5,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9641565/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9090765","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

Upgraded imaging capabilities at the BAMline (BESSY II). 升级BAMline (BESSY II)的成像能力。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2022-09-01 Epub Date: 2022-08-17 DOI: 10.1107/S1600577522007342

H Markötter, M Sintschuk, R Britzke, S Dayani, G Bruno

{"title":"Upgraded imaging capabilities at the BAMline (BESSY II).","authors":"H Markötter, M Sintschuk, R Britzke, S Dayani, G Bruno","doi":"10.1107/S1600577522007342","DOIUrl":"https://doi.org/10.1107/S1600577522007342","url":null,"abstract":"The BAMline at the BESSY II synchrotron X-ray source has enabled research for more than 20 years in widely spread research fields such as materials science, biology, cultural heritage and medicine. As a nondestructive characterization method, synchrotron X-ray imaging, especially tomography, plays a particularly important role in structural characterization. A recent upgrade of key equipment of the BAMline widens its imaging capabilities: shorter scan acquisition times are now possible, in situ and operando studies can now be routinely performed, and different energy spectra can easily be set up. In fact, the upgraded double-multilayer monochromator brings full flexibility by yielding different energy spectra to optimize flux and energy resolution as desired. The upgraded detector (based on an sCMOS camera) also allows exploiting the higher flux with reduced readout times. Furthermore, an installed slip ring allows the sample stage to continuously rotate. The latter feature enables tomographic observation of processes occurring in the time scale of a few seconds.","PeriodicalId":17114,"journal":{"name":"Journal of Synchrotron Radiation","volume":"29 Pt 5","pages":"1292-1298"},"PeriodicalIF":2.5,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9455212/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33449260","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: 3