Figure 4.4.2.4

Anderson, I. S.; Schärpf, O.

doi:10.1107/97809553602060000594

International
Tables for
Crystallography
Volume C
Mathematical, physical and chemical tables
Edited by E. Prince

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International Tables for Crystallography (2006). Vol. C. ch. 4.4, p. 436

Figure 4.4.2.4

I. S. Anderson^a and O. Schärpf^f

Figure 4.4.2.4

In a curved neutron guide, the transmission becomes λ dependent: (a) the possible types of reflection (garland and zig-zag), the direct line-of-sight length, the critical angle θ*, which is related to the characteristic wavelength $[\lambda^*=\theta^*{\sqrt{\pi/Nb_{\rm coh}}}]$ ; (b) transmission across the exit of the guide for different wavelengths, normalized to unity at the outside edge; (c) total transmission of the guide as a function of λ.