The interactive plot represents a 2D simulation of the reciprocal space produced by GaAs crystal as probed by an X-ray beam of 8keV. The sample is represented by green color. Dots correspond to reciprocal space points of GaAs. The incidence wave vector {$|\mathbf{q}|=\frac{2 \pi}{\lambda}$} is going from Source (S) to zero of reciprocal space. The omega angle is the angle between the sample surface and the incidence beam (wave vector). The wave vector of the diffracted beam is represented by a gray dotted line. The same vector shifted to the origin of the incoming wave vector (S) to Detector (D) is used in the vector sum operation to receive the diffraction vector Q which is shown in red and goes from zero to (D). The size of the probed distances at given Q is {$d=\frac{2 \pi}{|\mathbf{Q}|}$}.
(c)2015 Slobodskyy