UPGRADE STATUS OF INJECTOR LINAC FOR SuperKEKB

KEK injector linac is being upgraded towards the SuperKEKB which is an asymmetric collider of 7-GeV electron and 4-GeV positron. Full-energy, high-charge and low-emittance beams are necessary in order to achieve a design luminosity of 8×10 35 cm -2 s -1 for the study of the flavour physics of elementary particles. New components such as a photocathode RF gun and a positron capture system with a flux concentrator were already integrated. Electron and positron beams are commissioned to confirm the beam properties.