Journal of Synchrotron Radiation最新文献_第8页

Characterization of silicon pore optics for the NewAthena X-ray observatory in the PTB laboratory at BESSY II. 在 BESSY II 的 PTB 实验室对用于 NewAthena X 射线观测台的硅孔隙光学器件进行鉴定。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-24 DOI: 10.1107/S1600577524004090

M Krumrey, D Skroblin, L Cibik, M Collon, G Vacanti, N Barrière, E Hauser, M Bavdaz

{"title":"Characterization of silicon pore optics for the NewAthena X-ray observatory in the PTB laboratory at BESSY II.","authors":"M Krumrey, D Skroblin, L Cibik, M Collon, G Vacanti, N Barrière, E Hauser, M Bavdaz","doi":"10.1107/S1600577524004090","DOIUrl":"10.1107/S1600577524004090","url":null,"abstract":"The New Advanced Telescope for High ENergy Astrophysics (NewAthena) will be the largest space-based X-ray observatory ever built. It will have an effective area above 1.1 m2 at 1 keV, which corresponds to a polished mirror surface of about 300 m2 due to the grazing incidence. As such a mirror area is not achievable with an acceptable mass even with nested shells, silicon pore optics (SPO) technology will be utilized. In the PTB laboratory at BESSY II, two dedicated beamlines are in use for their characterization with monochromatic radiation at 1 keV and a low divergence well below 2 arcsec: the X-ray Pencil Beam Facility (XPBF 1) and the X-ray Parallel Beam Facility (XPBF 2.0), where beam sizes up to 8 mm × 8 mm are available while maintaining low beam divergence. This beamline is used for characterizing mirror stacks and controlling the focusing properties of mirror modules (MMs) - consisting of four mirror stacks - during their assembly at the beamline. A movable CCD based camera system 12 m from the MM registers the direct and the reflected beams. The positioning of the detector is verified by a laser tracker. The energy-dependent reflectance in double reflection through the pores of an MM with an Ir coating was measured at the PTB four-crystal monochromator beamline in the photon energy range 1.75 keV to 10 keV, revealing the effects of the Ir M edges. The measured reflectance properties are in agreement with the design values to achieve the envisaged effective area.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11226178/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141451986","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

The effect of transport apertures on relay-imaged, sharp-edged laser profiles in photoinjectors and the impact on electron beam properties. 传输孔径对光射器中继成像锐边激光轮廓的影响以及对电子束特性的影响。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-06 DOI: 10.1107/S1600577524003904

Mark Roper, Suzanna Percival, Katherine Morrow

{"title":"The effect of transport apertures on relay-imaged, sharp-edged laser profiles in photoinjectors and the impact on electron beam properties.","authors":"Mark Roper, Suzanna Percival, Katherine Morrow","doi":"10.1107/S1600577524003904","DOIUrl":"10.1107/S1600577524003904","url":null,"abstract":"In a photoinjector electron source, the initial transverse electron bunch properties are determined by the spatial properties of the laser beam on the photocathode. Spatial shaping of the laser is commonly achieved by relay imaging an illuminated circular mask onto the photocathode. However, the Gibbs phenomenon shows that recreating the sharp edge and discontinuity of the cut profile at the mask on the cathode is not possible with an optical relay of finite aperture. Furthermore, the practical injection of the laser into the photoinjector results in the beam passing through small or asymmetrically positioned apertures. This work uses wavefront propagation to show how the transport apertures cause ripple structures to appear in the transverse laser profile even when effectively the full laser power is transmitted. The impact of these structures on the propagated electron bunch has also been studied with electron bunches of high and low charge density. With high charge density, the ripples in the initial charge distribution rapidly wash-out through space charge effects. However, for bunches with low charge density, the ripples can persist through the bunch transport. Although statistical properties of the electron bunch in the cases studied are not greatly affected, there is the potential for the distorted electron bunch to negatively impact machine performance. Therefore, these effects should be considered in the design phase of accelerators using photoinjectors.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11226154/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141285070","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

Laminography as a tool for imaging large-size samples with high resolution. 层析成像是对大尺寸样品进行高分辨率成像的工具。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-05-21 DOI: 10.1107/S1600577524002923

Viktor Nikitin, Gregg Wildenberg, Alberto Mittone, Pavel Shevchenko, Alex Deriy, Francesco De Carlo

{"title":"Laminography as a tool for imaging large-size samples with high resolution.","authors":"Viktor Nikitin, Gregg Wildenberg, Alberto Mittone, Pavel Shevchenko, Alex Deriy, Francesco De Carlo","doi":"10.1107/S1600577524002923","DOIUrl":"10.1107/S1600577524002923","url":null,"abstract":"Despite the increased brilliance of the new generation synchrotron sources, there is still a challenge with high-resolution scanning of very thick and absorbing samples, such as a whole mouse brain stained with heavy elements, and, extending further, brains of primates. Samples are typically cut into smaller parts, to ensure a sufficient X-ray transmission, and scanned separately. Compared with the standard tomography setup where the sample would be cut into many pillars, the laminographic geometry operates with slab-shaped sections significantly reducing the number of sample parts to be prepared, the cutting damage and data stitching problems. In this work, a laminography pipeline for imaging large samples (>1 cm) at micrometre resolution is presented. The implementation includes a low-cost instrument setup installed at the 2-BM micro-CT beamline of the Advanced Photon Source. Additionally, sample mounting, scanning techniques, data stitching procedures, a fast reconstruction algorithm with low computational complexity, and accelerated reconstruction on multi-GPU systems for processing large-scale datasets are presented. The applicability of the whole laminography pipeline was demonstrated by imaging four sequential slabs throughout an entire mouse brain sample stained with osmium, in total generating approximately 12 TB of raw data for reconstruction.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11226144/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141076788","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

Nonlinear optimization for a low-emittance storage ring. 低幅射存储环的非线性优化。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-25 DOI: 10.1107/S1600577524004569

Bonghoon Oh, Jinjoo Ko, Seunghwan Shin, Jaehyun Kim, Jaeyu Lee, Gyeongsu Jang

引用次数: 0

Enhanced X-ray free-electron laser performance with optical klystron and helical undulators. 利用光学 klystron 和螺旋起伏器提高 X 射线自由电子激光器的性能。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-11 DOI: 10.1107/S1600577524003254

Christoph Kittel, Marco Calvi, Sven Reiche, Nicholas Sammut, Guanglei Wang, Eduard Prat

{"title":"Enhanced X-ray free-electron laser performance with optical klystron and helical undulators.","authors":"Christoph Kittel, Marco Calvi, Sven Reiche, Nicholas Sammut, Guanglei Wang, Eduard Prat","doi":"10.1107/S1600577524003254","DOIUrl":"10.1107/S1600577524003254","url":null,"abstract":"This article presents a demonstration of the improved performance of an X-ray free-electron laser (FEL) using the optical klystron mechanism and helical undulator configuration, in comparison with the common planar undulator configuration without optical klystron. The demonstration was carried out at Athos, the soft X-ray beamline of SwissFEL. Athos has variable-polarization undulators, and small magnetic chicanes placed between every two undulators to fully exploit the optical klystron. It was found that, for wavelengths of 1.24 nm and 3.10 nm, the required length to achieve FEL saturation is reduced by about 35% when using both the optical klystron and helical undulators, with each effect accounting for about half of the improvement. Moreover, it is shown that a helical undulator configuration provides a 20% to 50% higher pulse energy than planar undulators. This work represents an important step towards more compact and high-power FELs, rendering this key technology more efficient, affordable and accessible to the scientific community.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11226174/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141307222","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

X-ray phase-contrast tomography of cells manipulated with an optical stretcher. 利用光学拉伸器对细胞进行 X 射线相位对比断层扫描。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-11 DOI: 10.1107/S1600577524003618

Jan Philipp Burchert, Jasper Frohn, Ulrike Rölleke, Hendrik Bruns, Boram Yu, Sophie Charlotte Gleber, Roland Stange, Madleen Busse, Markus Osterhoff, Tim Salditt, Sarah Köster

{"title":"X-ray phase-contrast tomography of cells manipulated with an optical stretcher.","authors":"Jan Philipp Burchert, Jasper Frohn, Ulrike Rölleke, Hendrik Bruns, Boram Yu, Sophie Charlotte Gleber, Roland Stange, Madleen Busse, Markus Osterhoff, Tim Salditt, Sarah Köster","doi":"10.1107/S1600577524003618","DOIUrl":"10.1107/S1600577524003618","url":null,"abstract":"X-rays can penetrate deeply into biological cells and thus allow for examination of their internal structures with high spatial resolution. In this study, X-ray phase-contrast imaging and tomography is combined with an X-ray-compatible optical stretcher and microfluidic sample delivery. Using this setup, individual cells can be kept in suspension while they are examined with the X-ray beam at a synchrotron. From the recorded holograms, 2D phase shift images that are proportional to the projected local electron density of the investigated cell can be calculated. From the tomographic reconstruction of multiple such projections the 3D electron density can be obtained. The cells can thus be studied in a hydrated or even living state, thus avoiding artifacts from freezing, drying or embedding, and can in principle also be subjected to different sample environments or mechanical strains. This combination of techniques is applied to living as well as fixed and stained NIH3T3 mouse fibroblasts and the effect of the beam energy on the phase shifts is investigated. Furthermore, a 3D algebraic reconstruction scheme and a dedicated mathematical description is used to follow the motion of the trapped cells in the optical stretcher for multiple rotations.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11226146/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141307223","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

Mango wiggler as a novel insertion device providing a large and symmetrical imaging field of view. 芒果摆动器作为一种新型插入装置，可提供大而对称的成像视野。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-21 DOI: 10.1107/S1600577524004429

Dongni Zhang, Ming Li, Xiaoyu Li, Huihua Lu, Yuhui Li, Jie Zhang, Gang Li, Weiwei Zhang, Yuhui Dong, Ye Tao, Weifan Sheng, Peng Liu

{"title":"Mango wiggler as a novel insertion device providing a large and symmetrical imaging field of view.","authors":"Dongni Zhang, Ming Li, Xiaoyu Li, Huihua Lu, Yuhui Li, Jie Zhang, Gang Li, Weiwei Zhang, Yuhui Dong, Ye Tao, Weifan Sheng, Peng Liu","doi":"10.1107/S1600577524004429","DOIUrl":"10.1107/S1600577524004429","url":null,"abstract":"A novel insertion device is introduced, designated as the Mango wiggler, designed for synchrotron radiation (SR) imaging that provides a large field of view. This innovative device is constructed from two orthogonal planar wigglers with a small difference in their period lengths, eliciting the phase difference of the magnetic fields to incrementally transitions from 0 to π/2. Such a configuration enlarges the vertical divergence of the light source, as with the horizontal divergence. The appellation `Mango wiggler' derives from the distinctive mango-shaped contour of its radiation field. A comprehensive suite of theoretical analyses and simulations has been executed to elucidate the radiation properties of the Mango wiggler, employing SPECTRA and Mathematica as calculation tools. In conjunction with the ongoing construction of the High Energy Photon Source in Beijing a practical Mango wiggler device has been fabricated for utilization in SR imaging applications. Theoretical analyses were applied to this particular Mango wiggler to yield several theoretical conclusions, and several simulations were performed according to the measured magnetic field results.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11226153/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141433161","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

GIWAXS experimental methods at the NFPS-BL17B beamline at Shanghai Synchrotron Radiation Facility. 上海同步辐射设施 NFPS-BL17B 光束线的 GIWAXS 实验方法。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-25 DOI: 10.1107/S1600577524004764

Zhongjie Zhu, Lanlu Lu, Chunyu Li, Qingjie Xiao, Tingting Wu, Jianchao Tang, Yijun Gu, Kangwen Bao, Yupu Zhang, Luozhen Jiang, Yang Liu, Weizhe Zhang, Shuyu Zhou, Wenming Qin

{"title":"GIWAXS experimental methods at the NFPS-BL17B beamline at Shanghai Synchrotron Radiation Facility.","authors":"Zhongjie Zhu, Lanlu Lu, Chunyu Li, Qingjie Xiao, Tingting Wu, Jianchao Tang, Yijun Gu, Kangwen Bao, Yupu Zhang, Luozhen Jiang, Yang Liu, Weizhe Zhang, Shuyu Zhou, Wenming Qin","doi":"10.1107/S1600577524004764","DOIUrl":"10.1107/S1600577524004764","url":null,"abstract":"The BL17B beamline at the Shanghai Synchrotron Radiation Facility was first designed as a versatile high-throughput protein crystallography beamline and one of five beamlines affiliated to the National Facility for Protein Science in Shanghai. It was officially opened to users in July 2015. As a bending magnet beamline, BL17B has the advantages of high photon flux, brightness, energy resolution and continuous adjustable energy between 5 and 23 keV. The experimental station excels in crystal screening and structure determination, providing cost-effective routine experimental services to numerous users. Given the interdisciplinary and green energy research demands, BL17B beamline has undergone optimization, expanded its range of experimental methods and enhanced sample environments for a more user-friendly testing mode. These methods include single-crystal X-ray diffraction, powder crystal X-ray diffraction, wide-angle X-ray scattering, grazing-incidence wide-angle X-ray scattering (GIWAXS), and fully scattered atom pair distribution function analysis, covering structure detection from crystalline to amorphous states. This paper primarily presents the performance of the BL17B beamline and the application of the GIWAXS methodology at the beamline in the field of perovskite materials.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11226147/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141451988","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

L₃-edge X-ray spectroscopy of rhodium and palladium compounds. 铑和钯化合物的 L3-edge X 射线光谱。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-26 DOI: 10.1107/S1600577524004673

Hugo Alexander Suarez Orduz, Luca Bugarin, Sarina Lena Heck, Paolo Dolcet, Maria Casapu, Jan Dierk Grunwaldt, Pieter Glatzel

引用次数: 0

The HEPS synchrotron unleashes new medical frontiers. HEPS 同步加速器开启了医学新领域。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-07-01 Epub Date: 2024-06-26 DOI: 10.1107/S1600577524003874

Jishizhan Chen, Chong Chen

引用次数: 0