Figure 4
Undulator tuning curves. Both first- and third-harmonic curves are shown for U33 (red dashed lines). This undulator was replaced by a U27 (green solid line) and a U23 (blue solid line). With both undulators tuned to the same energy, their sum (black solid line) peaks at 12 keV (red circle), the normal operating energy for high-flux pink-beam operation. |