Personal protection system for SuperKEKB, positron damping ring and PF-AR

The KEKB personal protection system (PPS) takes care of not only KEKB accelerator, but also PF-AR, Positron damping ring and their beam transport lines. The new beam transport line to the PF-AR was constructed, and it makes possible that the injector supplies the beam to the five storage rings (KEKB LER, HER, PF-AR, PF and Positron damping ring) simultaneously. The positron damping ring was also constructed at the middle of the injector. The injector is not only supply the beam to the damping ring, but also receive the beam from the damping ring. In this way, the accelerator operation scheme changed dramatically. The logic of the PPS has been changed to adapt the new accelerator operation scheme. The PPS is updated step by step. The Experimental Physics and Industrial Control System (EPICS) was introduced into the PPS. The many tools that are developed under EPICS environment, such as CSS (Control System Studio) BOY, CSS Archiver also have been adopted. (author)