Fig. 4: Undulator harmonics.
From: The Extremely Brilliant Source storage ring of the European Synchrotron Radiation Facility
The figure shows the 8th to 14th undulator harmonics from a 1.6 m long, U35 undulator (35 mm period) with the gap set at 12.6 mm. The inset shows a high-resolution scan of the 9th harmonic with the gap set at 13.4 mm.
