Area detector based photon correlation in the regime of short data batches: Data reduction for dynamic x-ray scattering

2000 ◽  
Vol 71 (9) ◽  
pp. 3274-3289 ◽  
Author(s):  
D. Lumma ◽  
L. B. Lurio ◽  
S. G. J. Mochrie ◽  
M. Sutton
Keyword(s):  
Data Reduction ◽  
Photon Correlation ◽  
X Ray ◽  
Area Detector ◽  
X Ray Scattering ◽  
Ray Scattering

Unveiling the origin of a nonequilibrium dynamic process detected by X-ray photon correlation spectroscopyviaa finite element analysis approach

2014 ◽  
Vol 70 (4) ◽  
pp. 338-347 ◽  
Author(s):  
Li Ma ◽  
Fan Zhang ◽  
Andrew Allen ◽  
Lyle Levine
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Analysis Approach ◽  
Element Analysis ◽  
Nonequilibrium Processes ◽  
Photon Correlation ◽  
X Ray ◽  
X Ray Scattering ◽  
Nonequilibrium Dynamic ◽  
Ray Scattering

It is a scientific and engineering challenge to characterize materials under nonequilibrium conditions. In recent years, X-ray photon correlation spectroscopy (XPCS), a synchrotron-based coherent X-ray scattering technique, has been found useful in determining the timescales associated with various nonequilibrium processes, with detailed descriptions of the underlying processes lacking. Here, both static ultra small angle X-ray scattering (USAXS) and dynamic USAXS-based XPCS were used to investigate a transient structural change (a nonequilibrium process) associated with an isothermal anneal in a glass polymer composite system. While the bulk USAXS technique lacked the required sensitivity to detect the change in the microstructures, the local structural reorganization was apparent in the XPCS study. The structural changes were modeled using a three-dimensional finite element analysis approach and wave-propagation theory was used to simulate the resulting reciprocal-space coherent scattering intensity. Qualitative agreement was found between the modeling and experimental results, which validates that stress relaxation in the viscous polymer matrix was responsible for the observed changes. This analysis demonstrates that multi-physics modeling of complex systems can be used to interpret XPCS measurements of nonequilibrium processes.

scholarly journals A customizable software for fast reduction and analysis of large X-ray scattering data sets: applications of the newDPDAKpackage to small-angle X-ray scattering and grazing-incidence small-angle X-ray scattering

2014 ◽  
Vol 47 (5) ◽  
pp. 1797-1803 ◽  
Author(s):  
Gunthard Benecke ◽  
Wolfgang Wagermaier ◽  
Chenghao Li ◽  
Matthias Schwartzkopf ◽  
Gero Flucke ◽  
...  
Keyword(s):  
Small Angle ◽  
Data Reduction ◽  
Grazing Incidence ◽  
Scattering Data ◽  
Limiting Factor ◽  
Online Data ◽  
Saxs Data ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

X-ray scattering experiments at synchrotron sources are characterized by large and constantly increasing amounts of data. The great number of files generated during a synchrotron experiment is often a limiting factor in the analysis of the data, since appropriate software is rarely available to perform fast and tailored data processing. Furthermore, it is often necessary to perform online data reduction and analysis during the experiment in order to interactively optimize experimental design. This article presents an open-source software package developed to process large amounts of data from synchrotron scattering experiments. These data reduction processes involve calibration and correction of raw data, one- or two-dimensional integration, as well as fitting and further analysis of the data, including the extraction of certain parameters. The software,DPDAK(directly programmable data analysis kit), is based on a plug-in structure and allows individual extension in accordance with the requirements of the user. The article demonstrates the use ofDPDAKfor on- and offline analysis of scanning small-angle X-ray scattering (SAXS) data on biological samples and microfluidic systems, as well as for a comprehensive analysis of grazing-incidence SAXS data. In addition to a comparison with existing software packages, the structure ofDPDAKand the possibilities and limitations are discussed.

Solution small-angle X-ray scattering studies on myosin with a multiwire area detector

1991 ◽  
Vol 24 (5) ◽  
pp. 852-856 ◽  
Author(s):  
A. R. Faruqi ◽  
R. A. Cross ◽  
J. Kendrick-Jones
Keyword(s):  
Small Angle ◽  
X Ray ◽  
Area Detector ◽  
X Ray Scattering ◽  
Ray Scattering

Coherent X-ray scattering beamline at port 9C of Pohang Light Source II

2013 ◽  
Vol 21 (1) ◽  
pp. 264-267 ◽  
Author(s):  
Chung-Jong Yu ◽  
Hae Cheol Lee ◽  
Chan Kim ◽  
Wonsuk Cha ◽  
Jerome Carnis ◽  
...  
Keyword(s):  
Light Source ◽  
Correlation Spectroscopy ◽  
X Rays ◽  
Photon Correlation ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
X Ray Scattering ◽  
Pohang Light Source ◽  
Diffraction Imaging ◽  
Ray Scattering

The coherent X-ray scattering beamline at the 9C port of the upgraded Pohang Light Source (PLS-II) at Pohang Accelerator Laboratory in Korea is introduced. This beamline provides X-rays of 5–20 keV, and targets coherent X-ray experiments such as coherent diffraction imaging and X-ray photon correlation spectroscopy. The main parameters of the beamline are summarized, and some preliminary experimental results are described.

Position-Resolved Small-Angle X-ray Scattering of Complex Biological Materials

1997 ◽  
Vol 30 (5) ◽  
pp. 765-769 ◽  
Author(s):  
P. Fratzl ◽  
H. F. Jakob ◽  
S. Rinnerthaler ◽  
P. Roschger ◽  
K. Klaushofer
Keyword(s):  
Small Angle ◽  
Biological Materials ◽  
Fiber Composites ◽  
Fiber Direction ◽  
Mechanical Function ◽  
X Ray ◽  
Area Detector ◽  
X Ray Scattering ◽  
The Individual ◽  
Ray Scattering

Many biological materials, like bone or wood, are hierarchically organized and optimized at all levels for their specific mechanical function. At the lowest level, these materials are fiber composites, where the fiber direction as well as the size of the individual components varies considerably with position inside a given specimen. For bone or wood, some of these parameters can be readily obtained by small-angle X-ray scattering (SAXS) in a position-resolved way. A scanning-SAXS system based on a pinhole camera with rotating anode and area detector is presented, and first applications to the study of bone and wood are reported.

Wide Angle and Small Angle X-ray Scattering Applications Using a Two-Dimensional Area Detector

1990 ◽  
Vol 34 ◽  
pp. 363-368
Author(s):  
B. G. Landes ◽  
R. A. Newman ◽  
P. R. Rudolf
Keyword(s):  
Dynamic Range ◽  
Scattering Data ◽  
Photographic Film ◽  
Scanning System ◽  
Imaging Plate ◽  
Two Dimensional ◽  
X Ray ◽  
Area Detector ◽  
X Ray Scattering ◽  
Ray Scattering

The traditional medium for collecting two-dimensional x-ray scattering patterns is photographic film. While x-ray film has excellent resolution, several factors make it a poor choice as a detection device: slow speed, limited dynamic range, the “human factor” (developing, fixing, film handling), and the lack of a commercial scanning system designed for reading two-dimensional x-ray films. Until recently, there were no practical alternatives to the use of photographic film for obtaining two-dimensional x-ray scattering data using a conventional x-ray source. In the past few years, two different detection systems have become available for collecting high quality two-dimensional x-ray scattering data: (1) the Siemens (Xentronics) area detector system, which is a gas filled, wire grid detector, and (2) the Fuji imaging-plate system, which utilizes a phosphor storage plate for imaging the x-ray scattering and a laser scanner to process the image.

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