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Figure 3
Sketch of a linear detector mounted at distance L from the center of rotation of the goniometer. In (a) the detector direction specifying the direction along which higher channel numbers are found is given by [{\hat{\bf d}}]. Also indicated is the width of one channel w and the center channel n0, which is the channel where the primary beam is centered at zero detector angle. Part (b) shows the possible detector tilt β (misalignment) resulting if a detector is not mounted perfectly perpendicular to the X-ray beam.

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