scholarly journals Preliminary exploration of hard X-ray coherent diffraction imaging method at SSRF

2020 ◽  
Vol 69 (3) ◽  
pp. 034102
Author(s):  
Guang-Zhao Zhou ◽  
Zhe Hu ◽  
Shu-Min Yang ◽  
Ke-Liang Liao ◽  
Ping Zhou ◽  
...  
Keyword(s):  
Imaging Method ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

scholarly journals Multiple defocused coherent diffraction imaging: method for simultaneously reconstructing objects and probe using X-ray free-electron lasers

2016 ◽  
Vol 24 (11) ◽  
pp. 11917 ◽  
Author(s):  
Makoto Hirose ◽  
Kei Shimomura ◽  
Akihiro Suzuki ◽  
Nicolas Burdet ◽  
Yukio Takahashi
Keyword(s):  
Free Electron ◽  
Imaging Method ◽  
Free Electron Lasers ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

Full-field X-ray diffraction microscopy using polymeric compound refractive lenses

2014 ◽  
Vol 47 (6) ◽  
pp. 1882-1888 ◽  
Author(s):  
J. Hilhorst ◽  
F. Marschall ◽  
T. N. Tran Thi ◽  
A. Last ◽  
T. U. Schülli
Keyword(s):  
Imaging Techniques ◽  
Light And Electron Microscopy ◽  
Added Value ◽  
Acquisition Time ◽  
Imaging Method ◽  
X Ray Diffraction ◽  
Polymeric Compound ◽  
Full Field ◽  
X Ray ◽  
Diffraction Imaging

Diffraction imaging is the science of imaging samples under diffraction conditions. Diffraction imaging techniques are well established in visible light and electron microscopy, and have also been widely employed in X-ray science in the form of X-ray topography. Over the past two decades, interest in X-ray diffraction imaging has taken flight and resulted in a wide variety of methods. This article discusses a new full-field imaging method, which uses polymer compound refractive lenses as a microscope objective to capture a diffracted X-ray beam coming from a large illuminated area on a sample. This produces an image of the diffracting parts of the sample on a camera. It is shown that this technique has added value in the field, owing to its high imaging speed, while being competitive in resolution and level of detail of obtained information. Using a model sample, it is shown that lattice tilts and strain in single crystals can be resolved simultaneously down to 10−3° and Δa/a= 10−5, respectively, with submicrometre resolution over an area of 100 × 100 µm and a total image acquisition time of less than 60 s.

scholarly journals A high-pressure cryocooling method for protein crystals and biological samples with reduced background X-ray scatter

2012 ◽  
Vol 46 (1) ◽  
pp. 234-241 ◽  
Author(s):  
Chae Un Kim ◽  
Jennifer L. Wierman ◽  
Richard Gillilan ◽  
Enju Lima ◽  
Sol M. Gruner
Keyword(s):  
High Pressure ◽  
Biological Samples ◽  
Protein Crystal ◽  
High Background ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
X Ray Scattering ◽  
Alternative Method ◽  
Helium Gas ◽  
Diffraction Imaging

High-pressure cryocooling has been developed as an alternative method for cryopreservation of macromolecular crystals and successfully applied for various technical and scientific studies. The method requires the preservation of crystal hydration as the crystal is pressurized with dry helium gas. Previously, crystal hydration was maintained either by coating crystals with a mineral oil or by enclosing crystals in a capillary which was filled with crystallization mother liquor. These methods are not well suited to weakly diffracting crystals because of the relatively high background scattering from the hydrating materials. Here, an alternative method of crystal hydration, called capillary shielding, is described. The specimen is kept hydratedviavapor diffusion in a shielding capillary while it is being pressure cryocooled. After cryocooling, the shielding capillary is removed to reduce background X-ray scattering. It is shown that, compared to previous crystal-hydration methods, the new hydration method produces superior crystal diffraction with little sign of crystal damage. Using the new method, a weakly diffracting protein crystal may be properly pressure cryocooled with little or no addition of external cryoprotectants, and significantly reduced background scattering can be observed from the resulting sample. Beyond the applications for macromolecular crystallography, it is shown that the method has great potential for the preparation of noncrystalline hydrated biological samples for coherent diffraction imaging with future X-ray sources.

Simulation of Coherent Diffraction Imaging Based on Scanning Transimission X-Ray Microscopy of Shanghai Synchrotron Radiation Facility

2011 ◽  
Vol 31 (4) ◽  
pp. 0418001
Author(s):  
谭兴兴 Tan Xingxing ◽  
刘海岗 Liu Haigang ◽  
郭智 Guo Zhi ◽  
吴衍青 Wu Yanqing ◽  
许子健 Xu Zijian ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Shanghai Synchrotron Radiation Facility ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

scholarly journals Multi-beam X-ray ptychography for high-throughput coherent diffraction imaging

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yudong Yao ◽  
Yi Jiang ◽  
Jeffrey A. Klug ◽  
Michael Wojcik ◽  
Evan R. Maxey ◽  
...  
Keyword(s):  
Fresnel Zone ◽  
Field Of View ◽  
X Ray ◽  
Single Beam ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging ◽  
Extended Field ◽  
Resolution Imaging ◽  
Diffraction Patterns ◽  
Scanning Mechanism

Abstract X-ray ptychography is a rapidly developing coherent diffraction imaging technique that provides nanoscale resolution on extended field-of-view. However, the requirement of coherence and the scanning mechanism limit the throughput of ptychographic imaging. In this paper, we propose X-ray ptychography using multiple illuminations instead of single illumination in conventional ptychography. Multiple locations of the sample are simultaneously imaged by spatially separated X-ray beams, therefore, the obtained field-of-view in one scan can be enlarged by a factor equal to the number of illuminations. We have demonstrated this technique experimentally using two X-ray beams focused by a house-made Fresnel zone plate array. Two areas of the object and corresponding double illuminations were successfully reconstructed from diffraction patterns acquired in one scan, with image quality similar with those obtained by conventional single-beam ptychography in sequence. Multi-beam ptychography approach increases the imaging speed, providing an efficient way for high-resolution imaging of large extended specimens.

scholarly journals Continuous scanning for Bragg coherent X-ray imaging

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Ni Li ◽  
Maxime Dupraz ◽  
Longfei Wu ◽  
Steven J. Leake ◽  
Andrea Resta ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Light Sources ◽  
Pt Nanoparticle ◽  
Strain Fields ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Scan Time ◽  
X Ray Imaging ◽  
Continuous Scanning ◽  
Diffraction Imaging

Abstract We explore the use of continuous scanning during data acquisition for Bragg coherent diffraction imaging, i.e., where the sample is in continuous motion. The fidelity of continuous scanning Bragg coherent diffraction imaging is demonstrated on a single Pt nanoparticle in a flow reactor at $$400\,^\circ \hbox {C}$$ 400 ∘ C in an Ar-based gas flowed at 50 ml/min. We show a reduction of 30% in total scan time compared to conventional step-by-step scanning. The reconstructed Bragg electron density, phase, displacement and strain fields are in excellent agreement with the results obtained from conventional step-by-step scanning. Continuous scanning will allow to minimise sample instability under the beam and will become increasingly important at diffraction-limited storage ring light sources.

scholarly journals Phase retrieval for Bragg coherent diffraction imaging at high x-ray energies

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
S. Maddali ◽  
M. Allain ◽  
W. Cha ◽  
R. Harder ◽  
J.-S. Park ◽  
...  
Keyword(s):  
Phase Retrieval ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

scholarly journals Transverse Coherence Limited Coherent Diffraction Imaging using a Molybdenum Soft X-ray Laser Pumped at Moderate Pump Energies

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
M. Zürch ◽  
R. Jung ◽  
C. Späth ◽  
J. Tümmler ◽  
A. Guggenmos ◽  
...  
Keyword(s):  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

Incorporating particle symmetry into orientation determination in single-particle imaging

2018 ◽  
Vol 74 (5) ◽  
pp. 512-517
Author(s):  
Miklós Tegze ◽  
Gábor Bortel
Keyword(s):  
Three Dimensional ◽  
Symmetric Case ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging ◽  
Diffraction Patterns ◽  
Particle Imaging ◽  
Single Particle Imaging ◽  
Orientation Determination

In coherent-diffraction-imaging experiments X-ray diffraction patterns of identical particles are recorded. The particles are injected into the X-ray free-electron laser (XFEL) beam in random orientations. If the particle has symmetry, finding the orientation of a pattern can be ambiguous. With some modifications, the correlation-maximization method can find the relative orientations of the diffraction patterns for the case of symmetric particles as well. After convergence, the correlation maps show the symmetry of the particle and can be used to determine the symmetry elements and their orientations. The C factor, slightly modified for the symmetric case, can indicate the consistency of the assembled three-dimensional intensity distribution.

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