EDDY CURRENT SEPTUM MAGNETS FOR BOOSTER INJECTION AND EXTRACTION, AND STORAGE RING INJECTION AT SYNCHROTRON SOLEIL

Eddy current thin septum magnets are used to inject or extract the electron beam to/from the Booster and to the Storage Ring (SR) of SOLEIL. Good transverse homogeneity in the gap for injected beam, and low leakage field on circulating beam is needed, as well as pulse stability. The Top Up injection mode of the Storage Ring needs a very low level of leakage field on the stored beam path. Operating currents are from 2000 A and 3000 A for Booster injection and extraction, to 5100 A for SR injection. This contribution will describe the magnets and the pulsed power supplies design. The electrical and magnetic measurement results will be presented, with a specific emphasis on the improvements needed to reduce the level of leakage field of the S