Mission Critical Operation Archiving System Using A Database For Synchrotron Radiation Beam Lines At The Photon Factory

The mission critical operation archiving system has been designed and built using the Oracle database for the twenty-two synchrotron radiation beam lines at the 2.5 GeV positron storage ring at the Photon Factory, where X-ray/VUV synchrotron radiation experiments are simultaneously carried out. When any one of beam lines is malfunctioning, neither injecting the 2.5 GeV beam into the storage ring nor operation of the ring is allowed due to the radiation safety reason. The system is designed for critical operation of the synchrotron radiation beam lines to provide a quick recovery from a failure, allowing a long term operation. The system has real-time capability to automatically store the database with all possible operational events of all vacuum valves/shutters and safety interlock signals, and all static operational data, including the pressures of the beam lines and the storage ring, and related operational data which represent the physical behaviors of the beam lines. By retrieving any combination of operational data, the system allows to reproduce the physical behaviors that have occurred in the beam lines. The total number of items to be inspected by the system is over 40 million in order to obtain a correlation between the faulty component and other physical components that suggests the cause of the failure. With the aid of the system, the operator at the control room can easily determine the faulty component, and recover the accelerator component. 1