Table 2. Averaged specific Bragg-plane slope errors and averaged normalized dispersions of the Bragg reflection widths in the reference silicon crystal and in the best diamond crystal VB5 (after HTHV annealing) calculated with binning number 80 from data measured with the old and the new beamline Be windows.

	Old Be window		New Be window
Crystal
(reflection)	(µrad mm−2)	(mm−2)	(µrad mm−2)	(mm−2)
Si(531)	0.08 (3)	0.007 (3)	0.05 (2)	0.003 (1)
C*(400)	0.12 (5)	0.013 (5)	0.08 (3)	0.006 (2)