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 a strong correlation between the rocking curve width and the local slope in the peak position observed with the 20 micron crystal.
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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 selected row and a selected column 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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column of pixels taken during a single scan.]]
 
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Latest revision as of 08:52, 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 selected row and a selected column 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 column of pixels taken during a single scan.