These animations follow the change in bending magnet (BM) spectra (in units of ph/s/mrad²/0.1% bandwidth) on the one hand, as a function of E_e, the electrons’ energy in the storage ring, typically measured in GeV, and on the other, as a function of B, the bending magnet’s field strength, typically of the order of 1 T, reaching several Tesla for superbends. The matlab codes prompt you to enter the range of E_e (or B) to be plotted, the step size from spectral curve to curve, the magnetic-field strength (or storage-ring energy), and the storage-ring current. The downloadable animations were created using the default parameters of 1.6 to 8 GeV in 0.1 GeV steps, 1.4 T field, and 0.8 to 8 T in 0.1 T steps, in a 3-GeV storage ring, respectively. Both assumed a 400 mA current. 

The curves are created from standard equations describing BM-radiation, provided in detail e.g., in the Appendix of a review of synchrotron radiation by R. P. Walker