The photon source is a linearly-polarizing undulator with the following characteristics:

Total length2652 mm
Period length54.4 mm
Number of full periods48
Minimum gap16 mm
Maximum deflection parameter (K max)4.06
Maximum effective field0.8 T
Total power at minimum gap and 500 mA ring current1.2 kW
Power in 0.62(h) x 1.36(v) mrad (M1 acceptance) at minimum gap and 500 mA ring current0.3 kW
Energy of first harmonic at minimum gap and on-axis radiation41.9 eV
PolarizationLinear horizontal

 

Examples of expected behavior with the smallest gap (as calculated for the measured magnetic field):