Focusing X-Rays with Curved Multiplate Crystal Cavity

Figure 6

Dispersion surface projected onto the plane of incidence of a Bragg diffraction: (a) the general wide-angle incidence case with ${\theta }_B<\pi /2$ and (b) the back diffraction case with ${\theta }_B$~ $\pi /2$. The green curves represent the dispersion surface inside the crystal.($\widehat{n}$: the crystal surface normal; ${\theta }_B$: the Bragg angle; $L_a$: the Laue point [14]).

(a)

(b)