Difference between revisions of "How the crystal curvature affects the rocking curve width"

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In regions of a crystal where the local curvature is large along the direction perpendicular to the rocking axis, a significant part of the rocking curve peak width for a pixel can arise from variation of the peak position within the pixel.  The following plots show significant differences between the rocking curve widths observed in the (-2 2 0) and (2 2 0) orientations that may be attributed to the differences in the local curvature along the two axes.
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In regions of a crystal where the local curvature is large along the direction perpendicular to the rocking axis, a significant part of the rocking curve peak width for a pixel can arise from variation of the peak position within the pixel.  The following plots show significant correlation between the observed rocking curve widths and the local curvature for a given row of pixels.
 
{|align="center"
 
{|align="center"
|[[Image:curvatureeff1.jpg|thumb|hi there]]
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|[[Image:curvatureeff1.jpg|thumb|Comparison between rocking curve width (black points, left axis) and local slope of the rocking curve peak angle (blue points, right axis) for a given
|[[Image:curvatureeff2.jpg|thumb|hi there]]
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row of pixels taken during a single scan.]]
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|[[Image:curvatureeff2.jpg|thumb|Comparison between rocking curve width (black points, left axis) and local slope of the rocking curve peak angle (blue points, right axis) for a given
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row of pixels taken during a single scan.]]
 
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|}

Revision as of 08:50, 10 March 2007

In regions of a crystal where the local curvature is large along the direction perpendicular to the rocking axis, a significant part of the rocking curve peak width for a pixel can arise from variation of the peak position within the pixel. The following plots show significant correlation between the observed rocking curve widths and the local curvature for a given row of pixels.

Comparison between rocking curve width (black points, left axis) and local slope of the rocking curve peak angle (blue points, right axis) for a given row of pixels taken during a single scan.
Comparison between rocking curve width (black points, left axis) and local slope of the rocking curve peak angle (blue points, right axis) for a given row of pixels taken during a single scan.