BEAM DYNAMICS IN POSITRTON INJECTOR SYSTEMS FOR THE NEXT GENERATION B-FACTORIES

SuperB and SuperKEKB are the next-generation Bfactories, aiming to boost their luminosities to around 10 36 cm −2 s −1 . To achieve their goals, high charge and small emittance are required for the injected beams. For the positron beam, it is indispensable to introduce a damping ring (DR). This paper will point out various issues in three sections: for the high emittance beam before the DR, the damping performance in the DR, and the transportation of the small emittance beam after the DR through the injection to the main ring. We will mainly discuss on the issues for the SuperKEKB as a typical case.