The photon source is a linearly-polarizing undulator with the following characteristics:
| Total length | 2652 mm |
| Period length | 54.4 mm |
| Number of full periods | 48 |
| Minimum gap | 16 mm |
| Maximum deflection parameter (K max) | 4.06 |
| Maximum effective field | 0.8 T |
| Total power at minimum gap and 500 mA ring current | 1.2 kW |
| Power in 0.62(h) x 1.36(v) mrad (M1 acceptance) at minimum gap and 500 mA ring current | 0.3 kW |
| Energy of first harmonic at minimum gap and on-axis radiation | 41.9 eV |
| Polarization | Linear horizontal |
Examples of expected behavior with the smallest gap (as calculated for the measured magnetic field):
