OPTIMISATION OF THE COATING THICKNESS ON THE CERAMIC VACUUM CHAMBERS OF SOLEIL STORAGE RING

The SOLEIL storage ring vacuum chamber integrates four matched injection kicker magnets, two diagnostics kicker magnets and a beam shaker, which need ceramic chambers with an inner titanium coating. For each equipment (according with its field amplitude and its time or frequency domain), the coating thickness has been evaluated from the different points of view: field attenuation, beam deposited power, magnet excitation deposited power, and cooling efficiency. So we could determine the different coating thicknesses and tolerances needed according to the different magnetic field shapes. The realised ceramic chambers have adequate coating resistances, with in particular a low non-uniformity among the matched injection kicker magnets chambers.