Calibration and correction of distortions in two-dimensional detector systemsa)

Hammersley, A. P.; Svensson, Sigfrid; Thompson, A.; Graafsma, H.; Kvick, Å.; Moy, Jean-Pierre

doi:10.1063/1.1145618

Cited by 163 publications

(86 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using the software FIT2D [10] the image plate data were corrected for centre and tilt misalignments. Local background subtraction and polarization correction is also applied to the measured intensities [11].…”

Section: Discussionmentioning

confidence: 99%

Hard X-ray studies of stress-induced phase transformations of superelastic NiTi shape memory alloys under uniaxial load

Hasan

Schmahl

Hackl

et al. 2008

Materials Science and Engineering: A

View full text Add to dashboard Cite

We examined the texture evolution in a superelastic Ni 50.7 Ti 49.3 (numbers indicate at.%) alloy under applied uniaxial stress using high-energy synchrotron X-ray diffraction in transmission geometry. Texture information is identified from the intensity variations along Debye-Scherrer rings recorded on area detector diffraction images. The 1 1 0 A austenite plane normals are aligned in the rolling direction and 2 0 0 A is in the transverse direction. Due to the B2-B19 lattice correspondence, the 1 1 0 A peak splits into four martensite peaks 0 2 0 M ,1 1 1 M , 0 0 2 M and 1 1 1 M . The stress-induced martensite is strongly textured from twin variant selection in the stress field with 0 2 0 M aligned in the loading direction while the maxima corresponding to1 1 1 M , 0 0 2 M and 1 1 1 M are at 60 • , 67 • and 75 • from the loading direction. (B19 unit cell setting: a = 2.87Å, b = 4.59Å, c = 4.1Å, ␥ = 96.2 • ). A comparison between the experimental and recalculated distribution densities for the polycrystalline NiTi shows a reasonable agreement. In addition, we compare our experimental results with a micromechanical model which is based on total energy minimization. In this case, we also observe an overall agreement.

show abstract

Section: Discussionmentioning

confidence: 99%

Hard X-ray studies of stress-induced phase transformations of superelastic NiTi shape memory alloys under uniaxial load

Hasan

Schmahl

Hackl

et al. 2008

Materials Science and Engineering: A

View full text Add to dashboard Cite

show abstract

“…The detector used at BL9 is a MAR345 imaging plate with a circular active area of diameter 345 mm and a minimum pixel size of 100 mm Â 100 mm. Image plates have found great acceptance and widespread use mainly because of their high sensitivity, low intrinsic noise, large dynamic range ($ 10 5 ) and relatively long-lived image with half-life times of 1-100 h, depending on the type of the imaging plate (White et al, 1999;Hammersley et al, 1995;Amemiya, 1995). The exposure time of the sample to the X-ray beam can be controlled via beamline software as well as via manual override control of the fast shutter electronics.…”

Section: Experimental Set-up For Saxs and Waxsmentioning

confidence: 99%

“…To account for the self-decay of the detector-recorded image, the buffer measurement was always measured with the same exposure time. Since the decay of Fuji imaging plates, being used in MAR345 scanners, is only a function of time and does not depend on the exposure level (see Hammersley et al, 1995;Amemiya, 1995), this will compensate for any decay effects in the difference signal that otherwise would become significant owing to long time measurements.…”

Section: Saxs Of Aqueous Lysozyme and Staphylococcal Nuclease Solutionsmentioning

confidence: 99%

The small-angle and wide-angle X-ray scattering set-up at beamline BL9 of DELTA

et al. 2007

View full text Add to dashboard Cite

The multi-purpose experimental endstation of beamline BL9 at the Dortmund Electron Accelerator (DELTA) is dedicated to diffraction experiments in grazing-incidence geometry, reflectivity and powder diffraction measurements. Moreover, fluorescence analysis and inelastic X-ray scattering experiments can be performed. Recently, a new set-up for small-angle and wide-angle X-ray scattering utilizing detection by means of an image-plate scanner was installed and is described in detail here. First small-angle X-ray scattering experiments on aqueous solutions of lysozyme with different cosolvents and of staphylococcal nuclease are discussed. The application of the set-up for texture analysis is emphasized and a study of the crystallographic texture of natural bionanocomposites, using lobster and crab cuticles as model materials, is presented.

show abstract

“…Our general approach to distortion calibration and correction is described by Hammersley, Svensson & Thompson (1994) and Hammersley et al (1995). For calibration and characterization of the spatial distortion, a copper calibration grid mask was manufactured.…”

Section: Spatial Distortion Correctionmentioning

confidence: 99%

Calibration and Application of an X-ray Image Intensifier/ Charge-Coupled Device Detector for Monochromatic Macromolecular Crystallography

Hammersley

Brown²,

Burmeister³

et al. 1997

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

Charge-coupled device (CCD)-based X-ray detectors allow data to be collected much more quickly (--,10 times) than with current on-line imaging-plate systems. At the ESRF, X-ray image intensifier/CCD detector systems have been developed. These have great potential as fast read-out detectors for macromolecular and other forms of crystallography. They are relatively large sensitive X-ray detectors but have two inherent weaknesses: convex detection surfaces leading to spatial distortion and non-uniformity of intensity response, and susceptibility to small changes in magnetic fields. A large improvement has been made to the accuracy obtained by non-uniformity of response calibration and correction, using fluorescence from doped lithium borate glasses. Monochromatic macromolecular crystallography demonstration experiments with external user groups have shown that high-quality results may be obtained under real experimental conditions.

show abstract

Calibration and correction of distortions in two-dimensional detector systemsa)

Cited by 163 publications

References 13 publications

Hard X-ray studies of stress-induced phase transformations of superelastic NiTi shape memory alloys under uniaxial load

Hard X-ray studies of stress-induced phase transformations of superelastic NiTi shape memory alloys under uniaxial load

The small-angle and wide-angle X-ray scattering set-up at beamline BL9 of DELTA

Calibration and Application of an X-ray Image Intensifier/ Charge-Coupled Device Detector for Monochromatic Macromolecular Crystallography

Contact Info

Product

Resources

About