International Workshop on Accelerator Alignment 2010

Long-term Variation of the Magnet Alignment of SPring-8 Storage Ring

16 Sept 2010, 11:50

20m

auditorium (Deutsches Elektronen-Synchrotron)

ground motion, long term monitoring, vibration D4, S2, Long Term Monitoring, Ground Motion, Vibration

Speaker

C. Zhang (Japan Synchrotron Radiation Research Institute)

Description

The operation of the SPring-8 was started in July 1997. From thence, the observations of the variations of magnet alignment are executed at regular periods. This paper concludes twelve years measurements. It is verified that the alignment of the magnets is very stable and the deteriorations were small. And, the deteriorations become estimated after several year observations. Meanwhile, for large scale survey of accelerator, there always is measurement bias because of measurement error. The biases make it difficult to compare individual measurements. Attempt was made to take away the bias from measurement by means of average and extract magnet deviations.