Speaker
Description
MAX IV is a synchrotron radiation facility based on a 3 GeV linear accelerator, which powers a soft and hard x-ray storage ring, as well as a short pulse facility. At MAX IV, the prediction, prevention and handling of failure is a critical part of ensuring a reliable beam for user access. A robust set of tools has been developed for use in failure-related procedures, which will be presented along with several examples.
Before handover to beamlines, parameters are compared to past and nominal values and alterations are made if necessary. Furthermore, after longer maintenance, a system of checklists delegated to subsystem owners is used to verify the equipment. During user access, operations personnel monitor accelerator systems with several applications, and are notified by an alarm system when parameters go beyond specified limits. When failure does occur, the personnel use various applications to diagnose the failure and collect data. Repetitive start-up tasks are automated to allow for a quick recovery.
After a failure, details are logged in a home-built data-driven logging system. This allows for evaluation of the performance of the facility, presenting statistics such as the uptime%, mean time to failure and mean time to repair. Moreover, the logged details are discussed with relevant subsystem owners to identify causes and formulate potential plans to improve facility performance. After a plan is made, progress is tracked and archived on completion. Several past examples of the continues improvements and their effects on performance will be presented.
