Figure 2
Calculated brilliance, beginning at the sixth harmonic, for (solid line) the 33 mm-period undulator with the 2.5° phase error and (dotted line) for an undulator with 4.6° phase error at 1.15 cm gap. The brilliance above 50 keV has been multiplied by a factor of four for clarity. While this difference in phase error has no effect at low harmonics, it would affect the brilliance at high harmonics. |