Pub Date : 2024-09-01Epub Date: 2024-08-05DOI: 10.1107/S160057752400609X
Matthias Dreimann, Frank Wahlert, Sebastian Roling, Rolf Treusch, Elke Plönjes, Helmut Zacharias
The split-and-delay unit (SDU) at FLASH2 will be upgraded to enable the simultaneous operation of two temporally, spatially and spectrally separated probe beams when the free-electron laser undulators are operated in a two-color scheme. By means of suitable thin filters and an optical grating beam path a wide range of combinations of photon energies in the spectral range from 150 eV to 780 eV can be chosen. In this paper, simulations of the spectral transmission and performance parameters of the filter technique are discussed, along with a monochromator with dispersion compensation presently under construction.
将对 FLASH2 的分离和延迟单元(SDU)进行升级,以便在自由电子激光起伏器以双色方案运行时,能够同时运行两束在时间、空间和光谱上分离的探测光束。通过适当的薄滤光片和光栅光束路径,可以选择光谱范围从 150 eV 到 780 eV 的各种光子能量组合。本文讨论了滤光片技术的光谱传输和性能参数模拟,以及目前正在建造的带色散补偿的单色仪。
{"title":"Development and performance simulations of a soft X-ray and XUV split-and-delay unit at beamlines FL23/24 at FLASH2 for time-resolved two-color pump-probe experiments.","authors":"Matthias Dreimann, Frank Wahlert, Sebastian Roling, Rolf Treusch, Elke Plönjes, Helmut Zacharias","doi":"10.1107/S160057752400609X","DOIUrl":"10.1107/S160057752400609X","url":null,"abstract":"<p><p>The split-and-delay unit (SDU) at FLASH2 will be upgraded to enable the simultaneous operation of two temporally, spatially and spectrally separated probe beams when the free-electron laser undulators are operated in a two-color scheme. By means of suitable thin filters and an optical grating beam path a wide range of combinations of photon energies in the spectral range from 150 eV to 780 eV can be chosen. In this paper, simulations of the spectral transmission and performance parameters of the filter technique are discussed, along with a monochromator with dispersion compensation presently under construction.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371028/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141894672","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}
Pub Date : 2024-09-01Epub Date: 2024-07-15DOI: 10.1107/S1600577524005034
Carlos Navarrete-León, P Stephen Patrick, Adam Doherty, Harry Allan, Silvia Cipiccia, Shashidhara Marathe, Kaz Wanelik, Michela Esposito, Charlotte K Hagen, Alessandro Olivo, Marco Endrizzi
Two-directional beam-tracking (2DBT) is a method for phase-contrast imaging and tomography that uses an intensity modulator to structure the X-ray beam into an array of independent circular beamlets that are resolved by a high-resolution detector. It features isotropic spatial resolution, provides two-dimensional phase sensitivity, and enables the three-dimensional reconstructions of the refractive index decrement, δ, and the attenuation coefficient, μ. In this work, the angular sensitivity and the spatial resolution of 2DBT images in a synchrotron-based implementation is reported. In its best configuration, angular sensitivities of ∼20 nrad and spatial resolution of at least 6.25 µm in phase-contrast images were obtained. Exemplar application to the three-dimensional imaging of soft tissue samples, including a mouse liver and a decellularized porcine dermis, is also demonstrated.
双向光束跟踪(2DBT)是一种用于相位对比成像和断层扫描的方法,它使用强度调制器将 X 射线束构造成独立的圆形小光束阵列,并由高分辨率探测器进行分辨。它具有各向同性的空间分辨率,提供二维相位灵敏度,并能对折射率下降值δ和衰减系数μ进行三维重建。在最佳配置下,相位对比图像的角度灵敏度为 20 nrad,空间分辨率至少为 6.25 µm。此外,还展示了对软组织样本(包括小鼠肝脏和脱细胞猪真皮)进行三维成像的示例应用。
{"title":"High-angular-sensitivity X-ray phase-contrast microtomography of soft tissue through a two-directional beam-tracking synchrotron set-up.","authors":"Carlos Navarrete-León, P Stephen Patrick, Adam Doherty, Harry Allan, Silvia Cipiccia, Shashidhara Marathe, Kaz Wanelik, Michela Esposito, Charlotte K Hagen, Alessandro Olivo, Marco Endrizzi","doi":"10.1107/S1600577524005034","DOIUrl":"10.1107/S1600577524005034","url":null,"abstract":"<p><p>Two-directional beam-tracking (2DBT) is a method for phase-contrast imaging and tomography that uses an intensity modulator to structure the X-ray beam into an array of independent circular beamlets that are resolved by a high-resolution detector. It features isotropic spatial resolution, provides two-dimensional phase sensitivity, and enables the three-dimensional reconstructions of the refractive index decrement, δ, and the attenuation coefficient, μ. In this work, the angular sensitivity and the spatial resolution of 2DBT images in a synchrotron-based implementation is reported. In its best configuration, angular sensitivities of ∼20 nrad and spatial resolution of at least 6.25 µm in phase-contrast images were obtained. Exemplar application to the three-dimensional imaging of soft tissue samples, including a mouse liver and a decellularized porcine dermis, is also demonstrated.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371031/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141617399","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}
Pub Date : 2024-09-01Epub Date: 2024-08-06DOI: 10.1107/S1600577524006283
Gudrun Lotze, Anand H S Iyer, Olof Bäcke, Sebastian Kalbfleisch, Magnus Hörnqvist Colliander
Errors in variable subscripts, equations and Fig. 8 in Section 3.2 of the article by Lotze et al. [(2024). J. Synchrotron Rad. 31, 42-52] are corrected.
{"title":"In situ characterization of stresses, deformation and fracture of thin films using transmission X-ray nanodiffraction microscopy. Corrigendum.","authors":"Gudrun Lotze, Anand H S Iyer, Olof Bäcke, Sebastian Kalbfleisch, Magnus Hörnqvist Colliander","doi":"10.1107/S1600577524006283","DOIUrl":"10.1107/S1600577524006283","url":null,"abstract":"<p><p>Errors in variable subscripts, equations and Fig. 8 in Section 3.2 of the article by Lotze et al. [(2024). J. Synchrotron Rad. 31, 42-52] are corrected.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371059/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141894673","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}
Pub Date : 2024-09-01Epub Date: 2024-08-27DOI: 10.1107/S1600577524007239
Chunpeng Wang, Xiaoyun Li, Rongzheng Wan, Jige Chen, Jing Ye, Ke Li, Aiguo Li, Renzhong Tai, Alessandro Sepe
To date, computed tomography experiments, carried-out at synchrotron radiation facilities worldwide, pose a tremendous challenge in terms of the breadth and complexity of the experimental datasets produced. Furthermore, near real-time three-dimensional reconstruction capabilities are becoming a crucial requirement in order to perform high-quality and result-informed synchrotron imaging experiments, where a large amount of data is collected and processed within a short time window. To address these challenges, we have developed and deployed a synchrotron computed tomography framework designed to automatically process online the experimental data from the synchrotron imaging beamlines, while leveraging the high-performance computing cluster capabilities to accelerate the real-time feedback to the users on their experimental results. We have, further, integrated it within a modern unified national authentication and data management framework, which we have developed and deployed, spanning the entire data lifecycle of a large-scale scientific facility. In this study, the overall architecture, functional modules and workflow design of our synchrotron computed tomography framework are presented in detail. Moreover, the successful integration of the imaging beamlines at the Shanghai Synchrotron Radiation Facility into our scientific computing framework is also detailed, which, ultimately, resulted in accelerating and fully automating their entire data processing pipelines. In fact, when compared with the original three-dimensional tomography reconstruction approaches, the implementation of our synchrotron computed tomography framework led to an acceleration in the experimental data processing capabilities, while maintaining a high level of integration with all the beamline processing software and systems.
{"title":"Accelerating imaging research at large-scale scientific facilities through scientific computing.","authors":"Chunpeng Wang, Xiaoyun Li, Rongzheng Wan, Jige Chen, Jing Ye, Ke Li, Aiguo Li, Renzhong Tai, Alessandro Sepe","doi":"10.1107/S1600577524007239","DOIUrl":"10.1107/S1600577524007239","url":null,"abstract":"<p><p>To date, computed tomography experiments, carried-out at synchrotron radiation facilities worldwide, pose a tremendous challenge in terms of the breadth and complexity of the experimental datasets produced. Furthermore, near real-time three-dimensional reconstruction capabilities are becoming a crucial requirement in order to perform high-quality and result-informed synchrotron imaging experiments, where a large amount of data is collected and processed within a short time window. To address these challenges, we have developed and deployed a synchrotron computed tomography framework designed to automatically process online the experimental data from the synchrotron imaging beamlines, while leveraging the high-performance computing cluster capabilities to accelerate the real-time feedback to the users on their experimental results. We have, further, integrated it within a modern unified national authentication and data management framework, which we have developed and deployed, spanning the entire data lifecycle of a large-scale scientific facility. In this study, the overall architecture, functional modules and workflow design of our synchrotron computed tomography framework are presented in detail. Moreover, the successful integration of the imaging beamlines at the Shanghai Synchrotron Radiation Facility into our scientific computing framework is also detailed, which, ultimately, resulted in accelerating and fully automating their entire data processing pipelines. In fact, when compared with the original three-dimensional tomography reconstruction approaches, the implementation of our synchrotron computed tomography framework led to an acceleration in the experimental data processing capabilities, while maintaining a high level of integration with all the beamline processing software and systems.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371030/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142082367","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}
Pub Date : 2024-09-01Epub Date: 2024-08-23DOI: 10.1107/S1600577524006581
Valérie Briois, Jean Paul Itié, Alain Polian, Andrew King, Aliou Sadia Traore, Eric Marceau, Ovidiu Ersen, Camille La Fontaine, Laurent Barthe, Anthony Beauvois, Olga Roudenko, Stéphanie Belin
Full-field transmission X-ray microscopy has been recently implemented at the hard X-ray ROCK-SOLEIL quick-EXAFS beamline, adding micrometre spatial resolution to the second time resolution characterizing the beamline. Benefiting from a beam size versatility due to the beamline focusing optics, full-field hyperspectral XANES imaging has been successfully used at the Fe K-edge for monitoring the pressure-induced spin transition of a 150 µm × 150 µm Fe(o-phen)2(NCS)2 single crystal and the charge of millimetre-sized LiFePO4 battery electrodes. Hyperspectral imaging over 2000 eV has been reported for the simultaneous monitoring of Fe and Cu speciation changes during activation of a FeCu bimetallic catalyst along a millimetre-sized catalyst bed. Strategies of data acquisition and post-data analysis using Jupyter notebooks and multivariate data analysis are presented, and the gain obtained using full-field hyperspectral quick-EXAFS imaging for studies of functional materials under process conditions in comparison with macroscopic information obtained by non-spatially resolved quick-EXAFS techniques is discussed.
最近,在硬 X 射线 ROCK-SOLEIL 快速-EXAFS 光束线实施了全场透射 X 射线显微镜技术,在光束线第二时间分辨率的基础上增加了微米空间分辨率。得益于光束线聚焦光学系统带来的光束尺寸多样性,全场高光谱 XANES 成像已成功用于铁 K 边,以监测 150 微米 × 150 微米 Fe(o-phen)2(NCS)2 单晶的压力诱导自旋转变以及毫米级磷酸铁锂电池电极的电荷。据报道,在铁铜双金属催化剂沿毫米大小的催化剂床活化过程中,2000 eV 以上的高光谱成像可同时监测铁和铜的种类变化。报告介绍了使用 Jupyter 笔记本和多元数据分析进行数据采集和后期数据分析的策略,并讨论了使用全场高光谱快速-EXAFS 成像研究过程条件下的功能材料与非空间分辨快速-EXAFS 技术获得的宏观信息相比所获得的收益。
{"title":"Hyperspectral full-field quick-EXAFS imaging at the ROCK beamline for monitoring micrometre-sized heterogeneity of functional materials under process conditions.","authors":"Valérie Briois, Jean Paul Itié, Alain Polian, Andrew King, Aliou Sadia Traore, Eric Marceau, Ovidiu Ersen, Camille La Fontaine, Laurent Barthe, Anthony Beauvois, Olga Roudenko, Stéphanie Belin","doi":"10.1107/S1600577524006581","DOIUrl":"10.1107/S1600577524006581","url":null,"abstract":"<p><p>Full-field transmission X-ray microscopy has been recently implemented at the hard X-ray ROCK-SOLEIL quick-EXAFS beamline, adding micrometre spatial resolution to the second time resolution characterizing the beamline. Benefiting from a beam size versatility due to the beamline focusing optics, full-field hyperspectral XANES imaging has been successfully used at the Fe K-edge for monitoring the pressure-induced spin transition of a 150 µm × 150 µm Fe(o-phen)<sub>2</sub>(NCS)<sub>2</sub> single crystal and the charge of millimetre-sized LiFePO<sub>4</sub> battery electrodes. Hyperspectral imaging over 2000 eV has been reported for the simultaneous monitoring of Fe and Cu speciation changes during activation of a FeCu bimetallic catalyst along a millimetre-sized catalyst bed. Strategies of data acquisition and post-data analysis using Jupyter notebooks and multivariate data analysis are presented, and the gain obtained using full-field hyperspectral quick-EXAFS imaging for studies of functional materials under process conditions in comparison with macroscopic information obtained by non-spatially resolved quick-EXAFS techniques is discussed.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371034/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044229","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}
Pub Date : 2024-09-01Epub Date: 2024-08-16DOI: 10.1107/S160057752400626X
Luka Novinec, Matteo Pancaldi, Flavio Capotondi, Giovanni De Ninno, Francesco Guzzi, George Kourousias, Emanuele Pedersoli, Barbara Ressel, Benedikt Rösner, Alberto Simoncig, Marco Zangrando, Michele Manfredda
Advances in physics have been significantly driven by state-of-the-art technology, and in photonics and X-ray science this calls for the ability to manipulate the characteristics of optical beams. Orbital angular momentum (OAM) beams hold substantial promise in various domains such as ultra-high-capacity optical communication, rotating body detection, optical tweezers, laser processing, super-resolution imaging etc. Hence, the advancement of OAM beam-generation technology and the enhancement of its technical proficiency and characterization capabilities are of paramount importance. These endeavours will not only facilitate the use of OAM beams in the aforementioned sectors but also extend the scope of applications in diverse fields related to OAM beams. At the FERMI Free-Electron Laser (Trieste, Italy), OAM beams are generated either by tailoring the emission process on the undulator side or, in most cases, by coupling a spiral zone plate (SZP) in tandem with the refocusing Kirkpatrick-Baez active optic system (KAOS). To provide a robust and reproducible workflow to users, a Hartmann wavefront sensor (WFS) is used for both optics tuning and beam characterization. KAOS is capable of delivering both tightly focused and broad spots, with independent control over vertical and horizontal magnification. This study explores a novel non-conventional `near collimation' operational mode aimed at generating beams with OAM that employs the use of a lithographically manufactured SZP to achieve this goal. The article evaluates the mirror's performance through Hartmann wavefront sensing, offers a discussion of data analysis methodologies, and provides a quantitative analysis of these results with ptychographic reconstructions.
{"title":"New achievements in orbital angular momentum beam characterization using a Hartmann wavefront sensor and the Kirkpatrick-Baez active optical system KAOS.","authors":"Luka Novinec, Matteo Pancaldi, Flavio Capotondi, Giovanni De Ninno, Francesco Guzzi, George Kourousias, Emanuele Pedersoli, Barbara Ressel, Benedikt Rösner, Alberto Simoncig, Marco Zangrando, Michele Manfredda","doi":"10.1107/S160057752400626X","DOIUrl":"10.1107/S160057752400626X","url":null,"abstract":"<p><p>Advances in physics have been significantly driven by state-of-the-art technology, and in photonics and X-ray science this calls for the ability to manipulate the characteristics of optical beams. Orbital angular momentum (OAM) beams hold substantial promise in various domains such as ultra-high-capacity optical communication, rotating body detection, optical tweezers, laser processing, super-resolution imaging etc. Hence, the advancement of OAM beam-generation technology and the enhancement of its technical proficiency and characterization capabilities are of paramount importance. These endeavours will not only facilitate the use of OAM beams in the aforementioned sectors but also extend the scope of applications in diverse fields related to OAM beams. At the FERMI Free-Electron Laser (Trieste, Italy), OAM beams are generated either by tailoring the emission process on the undulator side or, in most cases, by coupling a spiral zone plate (SZP) in tandem with the refocusing Kirkpatrick-Baez active optic system (KAOS). To provide a robust and reproducible workflow to users, a Hartmann wavefront sensor (WFS) is used for both optics tuning and beam characterization. KAOS is capable of delivering both tightly focused and broad spots, with independent control over vertical and horizontal magnification. This study explores a novel non-conventional `near collimation' operational mode aimed at generating beams with OAM that employs the use of a lithographically manufactured SZP to achieve this goal. The article evaluates the mirror's performance through Hartmann wavefront sensing, offers a discussion of data analysis methodologies, and provides a quantitative analysis of these results with ptychographic reconstructions.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371050/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141989247","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}
Pub Date : 2024-09-01Epub Date: 2024-07-30DOI: 10.1107/S1600577524005988
Marcus Agåker, Johan Söderström, Thomas M Baumann, Carl Johan Englund, Ludvig Kjellsson, Rebecca Boll, Alberto De Fanis, Simon Dold, Tommaso Mazza, Jacobo Montaño, Astrid Münnich, Terence Mullins, Yevheniy Ovcharenko, Nils Rennhack, Philipp Schmidt, Björn Senfftleben, Monica Turcato, Sergey Usenko, Michael Meyer, Joseph Nordgren, Jan Erik Rubensson
A 1D imaging soft X-ray spectrometer installed on the small quantum systems (SQS) scientific instrument of the European XFEL is described. It uses movable cylindrical constant-line-spacing gratings in the Rowland configuration for energy dispersion in the vertical plane, and Wolter optics for simultaneous 1D imaging of the source in the horizontal plane. The soft X-ray fluorescence spectro-imaging capability will be exploited in pump-probe measurements and in investigations of propagation effects and other nonlinear phenomena.
本文介绍了安装在欧洲XFEL小型量子系统(SQS)科学仪器上的一维成像软X射线光谱仪。它使用可移动的圆柱形恒定线间距光栅(Rowland配置)进行垂直面的能量分散,并使用沃尔特(Wolter)光学系统同时对水平面的光源进行一维成像。软 X 射线荧光光谱成像功能将用于泵探测量以及传播效应和其他非线性现象的研究。
{"title":"A 1D imaging soft X-ray spectrometer for the small quantum systems instrument at the European XFEL.","authors":"Marcus Agåker, Johan Söderström, Thomas M Baumann, Carl Johan Englund, Ludvig Kjellsson, Rebecca Boll, Alberto De Fanis, Simon Dold, Tommaso Mazza, Jacobo Montaño, Astrid Münnich, Terence Mullins, Yevheniy Ovcharenko, Nils Rennhack, Philipp Schmidt, Björn Senfftleben, Monica Turcato, Sergey Usenko, Michael Meyer, Joseph Nordgren, Jan Erik Rubensson","doi":"10.1107/S1600577524005988","DOIUrl":"10.1107/S1600577524005988","url":null,"abstract":"<p><p>A 1D imaging soft X-ray spectrometer installed on the small quantum systems (SQS) scientific instrument of the European XFEL is described. It uses movable cylindrical constant-line-spacing gratings in the Rowland configuration for energy dispersion in the vertical plane, and Wolter optics for simultaneous 1D imaging of the source in the horizontal plane. The soft X-ray fluorescence spectro-imaging capability will be exploited in pump-probe measurements and in investigations of propagation effects and other nonlinear phenomena.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371048/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141793819","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}
Pub Date : 2024-09-01Epub Date: 2024-07-23DOI: 10.1107/S1600577524005319
Jonathan Correa, Alexandr Ignatenko, David Pennicard, Sabine Lange, Sergei Fridman, Sebastian Karl, Leon Lohse, Björn Senfftleben, Ilya Sergeev, Sven Velten, Deepak Prajapat, Lars Bocklage, Hubertus Bromberger, Andrey Samartsev, Aleksandr Chumakov, Rudolf Rüffer, Joachim von Zanthier, Ralf Röhlsberger, Heinz Graafsma
TEMPUS is a new detector system being developed for photon science. It is based on the Timepix4 chip and, thus, it can be operated in two distinct modes: a photon-counting mode, which allows for conventional full-frame readout at rates up to 40 kfps; and an event-driven time-stamping mode, which allows excellent time resolution in the nanosecond regime in measurements with moderate X-ray flux. In this paper, the initial prototype, a single-chip device, is introduced, and the readout system described. Moreover, and in order to evaluate its capabilities, some tests were performed at PETRA III and ESRF for which results are also presented.
TEMPUS 是一种为光子科学开发的新型探测器系统。它以 Timepix4 芯片为基础,因此可以在两种不同的模式下运行:光子计数模式,允许以高达 40 kfps 的速率进行传统的全帧读出;事件驱动时间标记模式,允许在中等 X 射线通量的测量中实现纳秒级的出色时间分辨率。本文介绍了最初的原型(单芯片设备)和读出系统。此外,为了评估其能力,还在 PETRA III 和 ESRF 进行了一些测试,并介绍了测试结果。
{"title":"TEMPUS, a Timepix4-based system for the event-based detection of X-rays.","authors":"Jonathan Correa, Alexandr Ignatenko, David Pennicard, Sabine Lange, Sergei Fridman, Sebastian Karl, Leon Lohse, Björn Senfftleben, Ilya Sergeev, Sven Velten, Deepak Prajapat, Lars Bocklage, Hubertus Bromberger, Andrey Samartsev, Aleksandr Chumakov, Rudolf Rüffer, Joachim von Zanthier, Ralf Röhlsberger, Heinz Graafsma","doi":"10.1107/S1600577524005319","DOIUrl":"10.1107/S1600577524005319","url":null,"abstract":"<p><p>TEMPUS is a new detector system being developed for photon science. It is based on the Timepix4 chip and, thus, it can be operated in two distinct modes: a photon-counting mode, which allows for conventional full-frame readout at rates up to 40 kfps; and an event-driven time-stamping mode, which allows excellent time resolution in the nanosecond regime in measurements with moderate X-ray flux. In this paper, the initial prototype, a single-chip device, is introduced, and the readout system described. Moreover, and in order to evaluate its capabilities, some tests were performed at PETRA III and ESRF for which results are also presented.</p>","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371027/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753120","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}
Pub Date : 2024-09-01Epub Date: 2024-07-23DOI: 10.1107/S1600577524005423
Andras Bodi, Jonas Knurr, Patrick Ascher, Patrick Hemberger, Christoph Bostedt, Andre Al Haddad
The differentially pumped rare-gas filter at the end of the VUV beamline of the Swiss Light Source has been adapted to house a windowless absorption cell for gases. Absorption spectra can be recorded from 7 eV to up to 21 eV photon energies routinely, as shown by a new water and nitrous oxide absorption spectrum. By and large, the spectra agree with previously published ones both in terms of resonance energies and absorption cross sections, but that of N2O exhibits a small shift in the {tilde{bf D}} band and tentative fine structures that have not yet been fully described. This setup will facilitate the measurement of absorption spectra in the VUV above the absorption edge of LiF and MgF2 windows. It will also allow us to carry out condensed-phase measurements on thin liquid sheets and solid films. Further development options are discussed, including the recording of temperature-dependent absorption spectra, a stationary gas cell for calibration measurements, and the improvement of the photon energy resolution.
瑞士光源紫外线光束线末端的差分泵浦稀有气体过滤器已被改装成一个无窗气体吸收池。正如新的水和氧化亚氮吸收光谱所示,吸收光谱可以从 7 eV 到 21 eV 的光子能量范围内进行常规记录。大体上,这些光谱在共振能量和吸收截面方面都与之前公布的光谱一致,但一氧化二氮的光谱在{tilde{bf D}}带和暂定精细结构方面有小的偏移,而这些精细结构尚未得到充分描述。这一装置将有助于测量锂箔和镁箔窗吸收边以上的紫外吸收光谱。它还将使我们能够对液体薄片和固体薄膜进行凝聚相测量。我们还讨论了进一步的开发方案,包括记录随温度变化的吸收光谱、用于校准测量的固定气室以及提高光子能量分辨率。
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Pub Date : 2024-09-01Epub Date: 2024-08-22DOI: 10.1107/S1600577524006611
Tamires Gallo, Luigi Adriano, Michael Heymann, Agnieszka Wrona, Noelle Walsh, Gunnar Öhrwall, Flavia Callefo, Slawomir Skruszewicz, Mahesh Namboodiri, Ricardo Marinho, Joachim Schulz, Joana Valerio
One of the most challenging aspects of X-ray research is the delivery of liquid sample flows into the soft X-ray beam. Currently, cylindrical microjets are the most commonly used sample injection systems for soft X-ray liquid spectroscopy. However, they suffer from several drawbacks, such as complicated geometry due to their curved surface. In this study, we propose a novel 3D-printed nozzle design by introducing microscopic flat sheet jets that provide micrometre-thick liquid sheets with high stability, intending to make this technology more widely available to users. Our research is a collaboration between the EuXFEL and MAX IV research facilities. This collaboration aims to develop and refine a 3D-printed flat sheet nozzle design and a versatile jetting platform that is compatible with multiple endstations and measurement techniques. Our flat sheet jet platform improves the stability of the jet and increases its surface area, enabling more precise scanning and differential measurements in X-ray absorption, scattering, and imaging applications. Here, we demonstrate the performance of this new arrangement for a flat sheet jet setup with X-ray photoelectron spectroscopy, photoelectron angular distribution, and soft X-ray absorption spectroscopy experiments performed at the photoemission endstation of the FlexPES beamline at MAX IV Laboratory in Lund, Sweden.
X 射线研究中最具挑战性的方面之一是将液体样品流输送到软 X 射线束中。目前,圆柱形微射流是软 X 射线液体光谱学最常用的样品注入系统。然而,圆柱形微射流存在一些缺点,例如由于表面弯曲,几何形状复杂。在本研究中,我们提出了一种新颖的三维打印喷嘴设计,引入了可提供微米厚液片且稳定性高的微型平板喷嘴,旨在使这项技术更广泛地为用户所用。我们的研究是 EuXFEL 和 MAX IV 研究设施之间的一项合作。这项合作旨在开发和完善三维打印的平板喷嘴设计和多功能喷射平台,该平台与多个终端站和测量技术兼容。我们的平板喷射平台提高了喷射的稳定性并增加了其表面积,从而能够在 X 射线吸收、散射和成像应用中进行更精确的扫描和差分测量。在这里,我们通过在瑞典隆德 MAX IV 实验室 FlexPES 光束线的光发射端站进行的 X 射线光电子能谱、光电子角分布和软 X 射线吸收光谱实验,展示了这种新布置的平板射流装置的性能。
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