The Safety Interlock System of Synchrotron Radiation Research Center

The Safety Interlock System (SIS) at the Synchrotron Radiation Research Center (SRRC) is introduced. SIS is designed to protect people from exposure to accidental high radiation. It is composed of three subsystems. The Access Control System (ACS) prevents people from being exposed to the extremely high radiation inside the booster and storage ring shielding housing (or called the interlock area) during machine operation. The Beamline Enable Controller (BEC) controls the operation of the main shutter of each beamline. The Hutch Interlock System (HIS) prevents users from exposed to the radiation present when the X-ray beamlines are operating. The interlock design principles, the system features, the safety logic and electronic circuits are described along with the operation procedures