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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.13262">arXiv:2402.13262</a> <span> [<a href="https://arxiv.org/pdf/2402.13262">pdf</a>, <a href="https://arxiv.org/format/2402.13262">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Development of crystal optics for Multi-Projection X-ray Imaging for synchrotron and XFEL sources </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bellucci%2C+V">Valerio Bellucci</a>, <a href="/search/physics?searchtype=author&query=Birnsteinova%2C+S">Sarlota Birnsteinova</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+T">Tokushi Sato</a>, <a href="/search/physics?searchtype=author&query=Letrun%2C+R">Romain Letrun</a>, <a href="/search/physics?searchtype=author&query=Koliyadu%2C+J+C+P">Jayanath C. P. Koliyadu</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+C">Chan Kim</a>, <a href="/search/physics?searchtype=author&query=Giovanetti%2C+G">Gabriele Giovanetti</a>, <a href="/search/physics?searchtype=author&query=Deiter%2C+C">Carsten Deiter</a>, <a href="/search/physics?searchtype=author&query=Samoylova%2C+L">Liubov Samoylova</a>, <a href="/search/physics?searchtype=author&query=Petrov%2C+I">Ilia Petrov</a>, <a href="/search/physics?searchtype=author&query=Morillo%2C+L+L">Luis Lopez Morillo</a>, <a href="/search/physics?searchtype=author&query=Graceffa%2C+R">Rita Graceffa</a>, <a href="/search/physics?searchtype=author&query=Adriano%2C+L">Luigi Adriano</a>, <a href="/search/physics?searchtype=author&query=Huelsen%2C+H">Helge Huelsen</a>, <a href="/search/physics?searchtype=author&query=Kollmann%2C+H">Heiko Kollmann</a>, <a href="/search/physics?searchtype=author&query=Calliste%2C+T+N+T">Thu Nhi Tran Calliste</a>, <a href="/search/physics?searchtype=author&query=Korytar%2C+D">Dusan Korytar</a>, <a href="/search/physics?searchtype=author&query=Zaprazny%2C+Z">Zdenko Zaprazny</a>, <a href="/search/physics?searchtype=author&query=Mazzolari%2C+A">Andrea Mazzolari</a>, <a href="/search/physics?searchtype=author&query=Romagnoni%2C+M">Marco Romagnoni</a>, <a href="/search/physics?searchtype=author&query=Asimakopoulou%2C+E+M">Eleni Myrto Asimakopoulou</a>, <a href="/search/physics?searchtype=author&query=Yao%2C+Z">Zisheng Yao</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Yuhe Zhang</a>, <a href="/search/physics?searchtype=author&query=Ulicny%2C+J">Jozef Ulicny</a>, <a href="/search/physics?searchtype=author&query=Meents%2C+A">Alke Meents</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2402.13262v1-abstract-short" style="display: inline;"> X-ray Multi-Projection Imaging (XMPI) is an emerging technology that allows for the acquisition of millions of 3D images per second in samples opaque to visible light. This breakthrough capability enables volumetric observation of fast stochastic phenomena, which were inaccessible due to the lack of a volumetric X-ray imaging probe with kHz to MHz repetition rate. These include phenomena of indust… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.13262v1-abstract-full').style.display = 'inline'; document.getElementById('2402.13262v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.13262v1-abstract-full" style="display: none;"> X-ray Multi-Projection Imaging (XMPI) is an emerging technology that allows for the acquisition of millions of 3D images per second in samples opaque to visible light. This breakthrough capability enables volumetric observation of fast stochastic phenomena, which were inaccessible due to the lack of a volumetric X-ray imaging probe with kHz to MHz repetition rate. These include phenomena of industrial and societal relevance such as fractures in solids, propagation of shock waves, laser-based 3D printing, or even fast processes in the biological domain. Indeed, the speed of traditional tomography is limited by the shear forces caused by rotation, to a maximum of 1000 Hz in state-of-the-art tomography. Moreover, the shear forces can disturb the phenomena in observation, in particular with soft samples or sensitive phenomena such as fluid dynamics. XMPI is based on splitting an X-ray beam to generate multiple simultaneous views of the sample, therefore eliminating the need for rotation. The achievable performances depend on the characteristics of the X-ray source, the detection system, and the X-ray optics used to generate the multiple views. The increase in power density of the X-ray sources around the world now enables 3D imaging with sampling speeds in the kilohertz range at synchrotrons and megahertz range at X-ray Free-Electron Lasers (XFELs). Fast detection systems are already available, and 2D MHz imaging was already demonstrated at synchrotron and XFEL. In this work, we explore the properties of X-ray splitter optics and XMPI schemes that are compatible with synchrotron insertion devices and XFEL X-ray beams. We describe two possible schemes designed to permit large samples and complex sample environments. Then, we present experimental proof of the feasibility of MHz-rate XMPI at the European XFEL. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.13262v1-abstract-full').style.display = 'none'; document.getElementById('2402.13262v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">47 pages, 17 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.11920">arXiv:2305.11920</a> <span> [<a href="https://arxiv.org/pdf/2305.11920">pdf</a>, <a href="https://arxiv.org/format/2305.11920">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Image and Video Processing">eess.IV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Megahertz X-ray Multi-projection imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Villanueva-Perez%2C+P">Pablo Villanueva-Perez</a>, <a href="/search/physics?searchtype=author&query=Bellucci%2C+V">Valerio Bellucci</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Yuhe Zhang</a>, <a href="/search/physics?searchtype=author&query=Birnsteinova%2C+S">Sarlota Birnsteinova</a>, <a href="/search/physics?searchtype=author&query=Graceffa%2C+R">Rita Graceffa</a>, <a href="/search/physics?searchtype=author&query=Adriano%2C+L">Luigi Adriano</a>, <a href="/search/physics?searchtype=author&query=Asimakopoulou%2C+E+M">Eleni Myrto Asimakopoulou</a>, <a href="/search/physics?searchtype=author&query=Petrov%2C+I">Ilia Petrov</a>, <a href="/search/physics?searchtype=author&query=Yao%2C+Z">Zisheng Yao</a>, <a href="/search/physics?searchtype=author&query=Romagnoni%2C+M">Marco Romagnoni</a>, <a href="/search/physics?searchtype=author&query=Mazzolari%2C+A">Andrea Mazzolari</a>, <a href="/search/physics?searchtype=author&query=Letrun%2C+R">Romain Letrun</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+C">Chan Kim</a>, <a href="/search/physics?searchtype=author&query=Koliyadu%2C+J+C+P">Jayanath C. P. Koliyadu</a>, <a href="/search/physics?searchtype=author&query=Deiter%2C+C">Carsten Deiter</a>, <a href="/search/physics?searchtype=author&query=Bean%2C+R">Richard Bean</a>, <a href="/search/physics?searchtype=author&query=Giovanetti%2C+G">Gabriele Giovanetti</a>, <a href="/search/physics?searchtype=author&query=Gelisio%2C+L">Luca Gelisio</a>, <a href="/search/physics?searchtype=author&query=Ritschel%2C+T">Tobias Ritschel</a>, <a href="/search/physics?searchtype=author&query=Mancuso%2C+A">Adrian Mancuso</a>, <a href="/search/physics?searchtype=author&query=Chapman%2C+H+N">Henry N. Chapman</a>, <a href="/search/physics?searchtype=author&query=Meents%2C+A">Alke Meents</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+T">Tokushi Sato</a>, <a href="/search/physics?searchtype=author&query=Vagovic%2C+P">Patrik Vagovic</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.11920v1-abstract-short" style="display: inline;"> X-ray time-resolved tomography is one of the most popular X-ray techniques to probe dynamics in three dimensions (3D). Recent developments in time-resolved tomography opened the possibility of recording kilohertz-rate 3D movies. However, tomography requires rotating the sample with respect to the X-ray beam, which prevents characterization of faster structural dynamics. Here, we present megahertz… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.11920v1-abstract-full').style.display = 'inline'; document.getElementById('2305.11920v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.11920v1-abstract-full" style="display: none;"> X-ray time-resolved tomography is one of the most popular X-ray techniques to probe dynamics in three dimensions (3D). Recent developments in time-resolved tomography opened the possibility of recording kilohertz-rate 3D movies. However, tomography requires rotating the sample with respect to the X-ray beam, which prevents characterization of faster structural dynamics. Here, we present megahertz (MHz) X-ray multi-projection imaging (MHz-XMPI), a technique capable of recording volumetric information at MHz rates and micrometer resolution without scanning the sample. We achieved this by harnessing the unique megahertz pulse structure and intensity of the European X-ray Free-electron Laser with a combination of novel detection and reconstruction approaches that do not require sample rotations. Our approach enables generating multiple X-ray probes that simultaneously record several angular projections for each pulse in the megahertz pulse burst. We provide a proof-of-concept demonstration of the MHz-XMPI technique's capability to probe 4D (3D+time) information on stochastic phenomena and non-reproducible processes three orders of magnitude faster than state-of-the-art time-resolved X-ray tomography, by generating 3D movies of binary droplet collisions. We anticipate that MHz-XMPI will enable in-situ and operando studies that were impossible before, either due to the lack of temporal resolution or because the systems were opaque (such as for MHz imaging based on optical microscopy). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.11920v1-abstract-full').style.display = 'none'; document.getElementById('2305.11920v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.18043">arXiv:2303.18043</a> <span> [<a href="https://arxiv.org/pdf/2303.18043">pdf</a>, <a href="https://arxiv.org/format/2303.18043">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> </div> <p class="title is-5 mathjax"> Online dynamic flat-field correction for MHz Microscopy data at European XFEL </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Birnsteinova%2C+S">Sarlota Birnsteinova</a>, <a href="/search/physics?searchtype=author&query=de+Lima%2C+D+E+F">Danilo E. Ferreira de Lima</a>, <a href="/search/physics?searchtype=author&query=Sobolev%2C+E">Egor Sobolev</a>, <a href="/search/physics?searchtype=author&query=Kirkwood%2C+H+J">Henry J. Kirkwood</a>, <a href="/search/physics?searchtype=author&query=Bellucci%2C+V">Valerio Bellucci</a>, <a href="/search/physics?searchtype=author&query=Bean%2C+R+J">Richard J. Bean</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+C">Chan Kim</a>, <a href="/search/physics?searchtype=author&query=Koliyadu%2C+J+C+P">Jayanath C. P. Koliyadu</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+T">Tokushi Sato</a>, <a href="/search/physics?searchtype=author&query=Dall%27Antonia%2C+F">Fabio Dall'Antonia</a>, <a href="/search/physics?searchtype=author&query=Asimakopoulou%2C+E+M">Eleni Myrto Asimakopoulou</a>, <a href="/search/physics?searchtype=author&query=Yao%2C+Z">Zisheng Yao</a>, <a href="/search/physics?searchtype=author&query=Buakor%2C+K">Khachiwan Buakor</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Yuhe Zhang</a>, <a href="/search/physics?searchtype=author&query=Meents%2C+A">Alke Meents</a>, <a href="/search/physics?searchtype=author&query=Chapman%2C+H+N">Henry N. Chapman</a>, <a href="/search/physics?searchtype=author&query=Mancuso%2C+A+P">Adrian P. Mancuso</a>, <a href="/search/physics?searchtype=author&query=Villanueva-Perez%2C+P">Pablo Villanueva-Perez</a>, <a href="/search/physics?searchtype=author&query=Vagovic%2C+P">Patrik Vagovic</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.18043v1-abstract-short" style="display: inline;"> The X-ray microscopy technique at the European X-ray free-electron laser (EuXFEL), operating at a MHz repetition rate, provides superior contrast and spatial-temporal resolution compared to typical microscopy techniques at other X-ray sources. In both online visualization and offline data analysis for microscopy experiments, baseline normalization is essential for further processing steps such as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.18043v1-abstract-full').style.display = 'inline'; document.getElementById('2303.18043v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.18043v1-abstract-full" style="display: none;"> The X-ray microscopy technique at the European X-ray free-electron laser (EuXFEL), operating at a MHz repetition rate, provides superior contrast and spatial-temporal resolution compared to typical microscopy techniques at other X-ray sources. In both online visualization and offline data analysis for microscopy experiments, baseline normalization is essential for further processing steps such as phase retrieval and modal decomposition. In addition, access to normalized projections during data acquisition can play an important role in decision-making and improve the quality of the data. However, the stochastic nature of XFEL sources hinders the use of existing flat-flied normalization methods during MHz X-ray microscopy experiments. Here, we present an online dynamic flat-field correction method based on principal component analysis of dynamically evolving flat-field images. The method is used for the normalization of individual X-ray projections and has been implemented as an online analysis tool at the Single Particles, Clusters, and Biomolecules and Serial Femtosecond Crystallography (SPB/SFX) instrument of EuXFEL. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.18043v1-abstract-full').style.display = 'none'; document.getElementById('2303.18043v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 7 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.00072">arXiv:2303.00072</a> <span> [<a href="https://arxiv.org/pdf/2303.00072">pdf</a>, <a href="https://arxiv.org/format/2303.00072">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Absolute spectral metrology of XFEL pulses using diffraction in crystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Petrov%2C+I">Ilia Petrov</a>, <a href="/search/physics?searchtype=author&query=Samoylova%2C+L">Liubov Samoylova</a>, <a href="/search/physics?searchtype=author&query=Birnsteinova%2C+S">Sarlota Birnsteinova</a>, <a href="/search/physics?searchtype=author&query=Bellucci%2C+V">Valerio Bellucci</a>, <a href="/search/physics?searchtype=author&query=Makita%2C+M">Mikako Makita</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+T">Tokushi Sato</a>, <a href="/search/physics?searchtype=author&query=Letrun%2C+R">Romain Letrun</a>, <a href="/search/physics?searchtype=author&query=Koliyadu%2C+J">Jayanath Koliyadu</a>, <a href="/search/physics?searchtype=author&query=de+Wijn%2C+R">Raphael de Wijn</a>, <a href="/search/physics?searchtype=author&query=Mazzolari%2C+A">Andrea Mazzolari</a>, <a href="/search/physics?searchtype=author&query=Romagnoni%2C+M">Marco Romagnoni</a>, <a href="/search/physics?searchtype=author&query=Bean%2C+R">Richard Bean</a>, <a href="/search/physics?searchtype=author&query=Mancuso%2C+A">Adrian Mancuso</a>, <a href="/search/physics?searchtype=author&query=Meents%2C+A">Alke Meents</a>, <a href="/search/physics?searchtype=author&query=Chapman%2C+H+N">Henry N. Chapman</a>, <a href="/search/physics?searchtype=author&query=Vagovic%2C+P">Patrik Vagovic</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.00072v1-abstract-short" style="display: inline;"> At modern X-ray sources, such as synchrotrons and X-ray Free-Electron Lasers (XFELs), it is important to measure the absolute value of the photon energy directly. Here, a method for absolute spectral metrology is presented. A photon energy estimation method based on the spectral measurements and rocking of diffracting crystals is presented. The photon energy of SASE1 channel of the European XFEL w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.00072v1-abstract-full').style.display = 'inline'; document.getElementById('2303.00072v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.00072v1-abstract-full" style="display: none;"> At modern X-ray sources, such as synchrotrons and X-ray Free-Electron Lasers (XFELs), it is important to measure the absolute value of the photon energy directly. Here, a method for absolute spectral metrology is presented. A photon energy estimation method based on the spectral measurements and rocking of diffracting crystals is presented. The photon energy of SASE1 channel of the European XFEL was measured, and the benefits and applications of the precise photon energy evaluation are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.00072v1-abstract-full').style.display = 'none'; document.getElementById('2303.00072v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.12716">arXiv:2003.12716</a> <span> [<a href="https://arxiv.org/pdf/2003.12716">pdf</a>, <a href="https://arxiv.org/format/2003.12716">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Image and Video Processing">eess.IV</span> </div> </div> <p class="title is-5 mathjax"> Ptychographic X-ray Speckle Tracking with Multi Layer Laue Lens Systems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Morgan%2C+A+J">Andrew James Morgan</a>, <a href="/search/physics?searchtype=author&query=Murray%2C+K+T">Kevin T. Murray</a>, <a href="/search/physics?searchtype=author&query=Prasciolu%2C+M">Mauro Prasciolu</a>, <a href="/search/physics?searchtype=author&query=Fleckenstein%2C+H">Holger Fleckenstein</a>, <a href="/search/physics?searchtype=author&query=Yefanov%2C+O">Oleksandr Yefanov</a>, <a href="/search/physics?searchtype=author&query=Villanueva-Perez%2C+P">Pablo Villanueva-Perez</a>, <a href="/search/physics?searchtype=author&query=Mariani%2C+V">Valerio Mariani</a>, <a href="/search/physics?searchtype=author&query=Domaracky%2C+M">Martin Domaracky</a>, <a href="/search/physics?searchtype=author&query=Kuhn%2C+M">Manuela Kuhn</a>, <a href="/search/physics?searchtype=author&query=Aplin%2C+S">Steve Aplin</a>, <a href="/search/physics?searchtype=author&query=Mohacsi%2C+I">Istwan Mohacsi</a>, <a href="/search/physics?searchtype=author&query=Messerschmidt%2C+M">Marc Messerschmidt</a>, <a href="/search/physics?searchtype=author&query=Stachnik%2C+K">Karolina Stachnik</a>, <a href="/search/physics?searchtype=author&query=Du%2C+Y">Yang Du</a>, <a href="/search/physics?searchtype=author&query=Burkhart%2C+A">Anja Burkhart</a>, <a href="/search/physics?searchtype=author&query=Meents%2C+A">Alke Meents</a>, <a href="/search/physics?searchtype=author&query=Nazaretski%2C+E">Evgeny Nazaretski</a>, <a href="/search/physics?searchtype=author&query=Yan%2C+H">Hanfei Yan</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+X">Xiaojing Huang</a>, <a href="/search/physics?searchtype=author&query=Chu%2C+Y">Yong Chu</a>, <a href="/search/physics?searchtype=author&query=Chapman%2C+H+N">Henry N. Chapman</a>, <a href="/search/physics?searchtype=author&query=Bajt%2C+S">Sa拧a Bajt</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.12716v1-abstract-short" style="display: inline;"> The ever-increasing brightness of synchrotron radiation sources demands improved x-ray optics to utilise their capability for imaging and probing biological cells, nano-devices, and functional matter on the nanometre scale with chemical sensitivity. Hard x-rays are ideal for high-resolution imaging and spectroscopic applications due to their short wavelength, high penetrating power, and chemical s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.12716v1-abstract-full').style.display = 'inline'; document.getElementById('2003.12716v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.12716v1-abstract-full" style="display: none;"> The ever-increasing brightness of synchrotron radiation sources demands improved x-ray optics to utilise their capability for imaging and probing biological cells, nano-devices, and functional matter on the nanometre scale with chemical sensitivity. Hard x-rays are ideal for high-resolution imaging and spectroscopic applications due to their short wavelength, high penetrating power, and chemical sensitivity. The penetrating power that makes x-rays useful for imaging also makes focusing them technologically challenging. Recent developments in layer deposition techniques that have enabled the fabrication of a series of highly focusing x-ray lenses, known as wedged multi layer Laue lenses. Improvements to the lens design and fabrication technique demands an accurate, robust, in-situ and at-wavelength characterisation method. To this end, we have developed a modified form of the speckle-tracking wavefront metrology method, the ptychographic x-ray speckle tracking method, which is capable of operating with highly divergent wavefields. A useful by-product of this method, is that it also provides high-resolution and aberration-free projection images of extended specimens. We report on three separate experiments using this method, where we have resolved ray path angles to within 4 nano-radians with an imaging resolution of 45nm (full-period). This method does not require a high degree of coherence, making it suitable for lab based x-ray sources. Likewise it is robust to errors in the registered sample positions making it suitable for x-ray free-electron laser facilities, where beam pointing fluctuations can be problematic for wavefront metrology. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.12716v1-abstract-full').style.display = 'none'; document.getElementById('2003.12716v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.07263">arXiv:1906.07263</a> <span> [<a href="https://arxiv.org/pdf/1906.07263">pdf</a>, <a href="https://arxiv.org/format/1906.07263">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Megahertz X-ray microscopy at X-ray Free-Electron Laser and Synchrotron sources </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Vagovi%C4%8D%2C+P">Patrik Vagovi膷</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+T">Tokushi Sato</a>, <a href="/search/physics?searchtype=author&query=Mike%C5%A1%2C+L">Ladislav Mike拧</a>, <a href="/search/physics?searchtype=author&query=Mills%2C+G">Grant Mills</a>, <a href="/search/physics?searchtype=author&query=Graceffa%2C+R">Rita Graceffa</a>, <a href="/search/physics?searchtype=author&query=Mattsson%2C+F">Frans Mattsson</a>, <a href="/search/physics?searchtype=author&query=Villanueva-Perez%2C+P">Pablo Villanueva-Perez</a>, <a href="/search/physics?searchtype=author&query=Ershov%2C+A">Alexey Ershov</a>, <a href="/search/physics?searchtype=author&query=Farag%C3%B3%2C+T">Tom谩拧 Farag贸</a>, <a href="/search/physics?searchtype=author&query=Uli%C4%8Dn%C3%BD%2C+J">Jozef Uli膷n媒</a>, <a href="/search/physics?searchtype=author&query=Kirkwood%2C+H">Henry Kirkwood</a>, <a href="/search/physics?searchtype=author&query=Letrun%2C+R">Romain Letrun</a>, <a href="/search/physics?searchtype=author&query=Mokso%2C+R">Rajmund Mokso</a>, <a href="/search/physics?searchtype=author&query=Zdora%2C+M">Marie-Christine Zdora</a>, <a href="/search/physics?searchtype=author&query=Olbinado%2C+M+P">Margie P. Olbinado</a>, <a href="/search/physics?searchtype=author&query=Rack%2C+A">Alexander Rack</a>, <a href="/search/physics?searchtype=author&query=Baumbach%2C+T">Tilo Baumbach</a>, <a href="/search/physics?searchtype=author&query=Meents%2C+A">Alke Meents</a>, <a href="/search/physics?searchtype=author&query=Chapman%2C+H+N">Henry N. Chapman</a>, <a href="/search/physics?searchtype=author&query=Mancuso%2C+A+P">Adrian P. Mancuso</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.07263v1-abstract-short" style="display: inline;"> We demonstrate X-ray phase contrast microscopy performed at the European X-ray Free-Electron Laser sampled at 1.128 MHz rate. We have applied this method to image stochastic processes induced by an optical laser incident on water-filled capillaries with micrometer scale spatial resolution. The generated high speed water jet, cavitation formation and annihilation in water and glass, as well as glas… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.07263v1-abstract-full').style.display = 'inline'; document.getElementById('1906.07263v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.07263v1-abstract-full" style="display: none;"> We demonstrate X-ray phase contrast microscopy performed at the European X-ray Free-Electron Laser sampled at 1.128 MHz rate. We have applied this method to image stochastic processes induced by an optical laser incident on water-filled capillaries with micrometer scale spatial resolution. The generated high speed water jet, cavitation formation and annihilation in water and glass, as well as glass explosions are observed. The comparison between XFEL and previous synchrotron MHz microscopy shows the superior contrast and spatial resolution at the XFEL over the synchrotron. This work opens up new possibilities for the characterization of dynamic stochastic systems on nanosecond to microsecond time scales at megahertz rate with object velocities up to few kilometers per second using X-ray Free-Electron Laser sources. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.07263v1-abstract-full').style.display = 'none'; document.getElementById('1906.07263v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">First MHz-rate microscopy at European XFEL</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.1688">arXiv:1311.1688</a> <span> [<a href="https://arxiv.org/pdf/1311.1688">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/8/11/C11001">10.1088/1748-0221/8/11/C11001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of an LPD prototype detector at MHz frame rates under Synchrotron and FEL radiation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Koch%2C+A">Andreas Koch</a>, <a href="/search/physics?searchtype=author&query=Hart%2C+M">Matthew Hart</a>, <a href="/search/physics?searchtype=author&query=Nicholls%2C+T">Tim Nicholls</a>, <a href="/search/physics?searchtype=author&query=Angelsen%2C+C">Christian Angelsen</a>, <a href="/search/physics?searchtype=author&query=Coughlan%2C+J">John Coughlan</a>, <a href="/search/physics?searchtype=author&query=French%2C+M">Marcus French</a>, <a href="/search/physics?searchtype=author&query=Hauf%2C+S">Steffen Hauf</a>, <a href="/search/physics?searchtype=author&query=Kuster%2C+M">Markus Kuster</a>, <a href="/search/physics?searchtype=author&query=Sztuk-Dambietz%2C+J">Jolanta Sztuk-Dambietz</a>, <a href="/search/physics?searchtype=author&query=Turcato%2C+M">Monica Turcato</a>, <a href="/search/physics?searchtype=author&query=Carini%2C+G+A">Gabriella A. Carini</a>, <a href="/search/physics?searchtype=author&query=Chollet%2C+M">Matthieu Chollet</a>, <a href="/search/physics?searchtype=author&query=Herrmann%2C+S+C">Sven C. Herrmann</a>, <a href="/search/physics?searchtype=author&query=Lemke%2C+H+T">Henrik T. Lemke</a>, <a href="/search/physics?searchtype=author&query=Nelson%2C+S">Silke Nelson</a>, <a href="/search/physics?searchtype=author&query=Song%2C+S">Sanghoon Song</a>, <a href="/search/physics?searchtype=author&query=Weaver%2C+M">Matt Weaver</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+D">Diling Zhu</a>, <a href="/search/physics?searchtype=author&query=Meents%2C+A">Alke Meents</a>, <a href="/search/physics?searchtype=author&query=Fischer%2C+P">Pontus Fischer</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.1688v1-abstract-short" style="display: inline;"> A MHz frame rate X-ray area detector (LPD - Large Pixel Detector) is under development by the Rutherford Appleton Laboratory for the European XFEL. The detector will have 1 million pixels and allows analogue storage of 512 images taken at 4.5 MHz in the detector front end. The LPD detector has 500 mm thick silicon sensor tiles that are bump bonded to a readout ASIC. The ASICs preamplifier provides… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.1688v1-abstract-full').style.display = 'inline'; document.getElementById('1311.1688v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.1688v1-abstract-full" style="display: none;"> A MHz frame rate X-ray area detector (LPD - Large Pixel Detector) is under development by the Rutherford Appleton Laboratory for the European XFEL. The detector will have 1 million pixels and allows analogue storage of 512 images taken at 4.5 MHz in the detector front end. The LPD detector has 500 mm thick silicon sensor tiles that are bump bonded to a readout ASIC. The ASICs preamplifier provides relatively low noise at high speed which results in a high dynamic range of 10^5 photons over an energy range of 5-20 keV. Small scale prototypes of 32x256 pixels (LPD 2-Tile detector) and 256x256 pixels (LPD supermodule detector) are now available for X-ray tests. The performance of prototypes of the detector is reported for first tests under synchrotron radiation (PETRA III at DESY) and Free-Electron-Laser radiation (LCLS at SLAC). The initial performance of the detector in terms of signal range and noise, radiation hardness and spatial and temporal response are reported. The main result is that the 4.5 MHz sampling detection chain is reliably working, including the analogue on-chip memory concept. The detector is at least radiation hard up to 5 MGy at 12 keV. In addition the multiple gain concept has been demonstrated over a dynamic range to 10^4 at 12 keV with a readout noise equivalent to <1 photon rms in its most sensitive mode. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.1688v1-abstract-full').style.display = 'none'; document.getElementById('1311.1688v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2013_JINST_8_C11001 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> 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