HIGH FIELD DIPOLE
An innovation in the Sirius lattice is the introduction of high field permanent magnets of 3.3 Tesla in the middle of the central 0.58 T dipole of the 5BA cell. Besides contributing to the reduction of emittance, these high field dipoles will also produce hard X-rays with critical photon energy of about 20 keV, which means that the dipoles produce usable photon flux up to about 120 keV.
This configuration minimizes the total power of the dipole radiation emitted by the electron beam. The combination of dipoles with low magnetic fields and high field inserts only in the positions of the light output to generate hard X-rays is an innovative aspect of the project, which not only reduces the total radio frequency (RF) power required, but also reduces the need for cooling of the vacuum chamber.
The main elements of the magnetic lattice of the Sirius Storage Ring are 120 low-field dipoles (0.58 Tesla), 20 high field thin dipoles (3.3 Teslas), 260 quadrupole, 280 sextupoles, 160 slow horizontal orbit corrector magnets, 80 quick horizontal orbit corrector magnets, slow vertical 120 orbit corrector magnets and 80 quick vertical orbit corrector magnets.