Table 3. Beam parameters of the PETRA III source (low-β) for a photon energy of 8 keV (Balewski et al., 2004 ▶).

The coherence properties at the source and at a distance of 85 m downstream of the source are presented (Vartanyants & Singer, 2010 ▶).

	Horizontal	Vertical
Beam size at the source (µm)	36.2	6.3
Transverse coherence length at the source (µm)	0.9	7.7
Beam size at 85 m (µm)	2370	320
Transverse coherence at 85 m (µm)	58	390
Degree of coherence ζ	0.01	0.52