Figure 18
Periods of the undulator recovered by analysing the reference and measured magnetic fields for the simulation shown in Fig. 16. The measured magnetic field has been artificially shifted down by 15.9 µm for a better visualization of the component of the component F(p) of the systematic error. The periodic behaviour of the helium level during the measurement generates a periodic systematic error. The corrected data are also plot. These curves are obtained considering dHP,err = 0 µm. |