Laue case geometry

Fig. la. Laue diffraction geometry showing the accessible region of reciprocal space between the Ewald spheres associated with and and the sample resolution limited d . O is the origin of of reciprocal space, b. A ray with n orders inside the d in sphere can have a recorded multiplicity m < n where (n — m) RLPs are outside the accessible region. The diagram shows the case of n = 5 and m = 2. Only the upper section of the volume of resolution of the accessible region is shown. (From [9])... 

For being able to make a specific evaluation, a plane-parallel geometry of the crystal is chosen, looking for the solutions of the propagation for the two consecrated cases, respectively the Laue and Bragg diffractions, schematically represented in Figure 5.25. 

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