Figure 3
(a) Calculated on-axis spectrum (photon-flux density) obtained by a Fourier transform of the measured magnetic data on the XU#MR0 (K = 1.09, λu = 4.5 cm and N = 120) for the first harmonic in the case without any electron beam emittance. The present case (solid curve) is compared with a completely ideal case (dashed curve) without errors in both the vertical and horizontal fields, and also with a case without horizontal errors (Bx ≡ 0; dotted curve). (b) Calculated spectrum for the third harmonic obtained in a same way as in (a); (c) fifth harmonic and (d) seventh harmonic. |