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. 2012 Mar 20;19(Pt 3):442–449. doi: 10.1107/S0909049512006395

Table 1. Characteristics of the electron storage ring BESSY II and the 7T-WLS source.

Electron energy 1.7 GeV
Circumference 240 m
Emittance 5 nrad m
Magnetic field 7 T
Critical energy 13.8 keV
Used horizontal opening 40 mrad
Source size (σx) 50 µm
Source size (σy) 20 µm
Source divergence (σy) 21 µrad