Table 2. Parameters of a horizontal KB-focusing mirror HFM at beamline P06 at PETRA III.

Mirror parameter	Specification	Measurement result
Source distance (mm)	93700	93700
Focus distance (mm)	250	250
Grazing angle (mrad)	2.7	2.69
Residual slope error (nrad)	Not defined	41
Residual figure error (nm)	p.v.: 1	p.v.: 0.37; r.m.s.: <0.1
Micro-roughness (nm r.m.s.)	S q ≤ 0.2	S q = 0.07–0.12 (1.25×)
		S q = 0.08–0.11 (20×)
		S q = 0.07–0.10 (50×)