International
Tables for Crystallography Volume C Mathematical, physical and chemical tables Edited by E. Prince © International Union of Crystallography 2006 
International Tables for Crystallography (2006). Vol. C, ch. 7.4, p. 662
Figure 7.4.4.3
P. Suortti^{c}


Figure 7.4.4.3
Equatorial phasespace diagrams for two wavelengths, λ_{1} (solid lines) and λ_{2} (broken lines), projected on the plane λ = λ_{1}. The monochromator at z = 200 mm is a flat mosaic crystal, and a small sample is located at z = 400 mm, as shown by the shaded area. The reflected beams at the receiving slit are shown for the (+, +) and (+, −) configurations of the monochromator and the sample. 