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Figure 1
The Lorentz correction is governed by the orientation of the sample rotation axis, given by the angular velocity vector [{\bf \omega}], with respect to the scattering vector [{\bf Q}]. The point P represents a reciprocal lattice node in the instant it rotates through and intersects with the Ewald sphere. Specifically, the correction is proportional to the velocity vector [{\bf v}] of the point P projected onto the unit wavevector [-{\widehat{\bf k}^{\prime}}] of the scattered ray.

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