RELIABILITY IMPROVEMENTS OF THE DIAMOND SUPERCONDUCTING CAVITIES

For successful operation of superconducting cavities in light sources, high reliability and minimal beam losses are essential. Diamond started operation with users in January 2007 and since then, the Diamond storage ring superconducting cavities have been the largest single contributor to unplanned beam trips. We have dedicated extensive effort to improve our data acquisition, numerical modelling and fault analysis to improve our understanding of the main causes of the trips and how to prevent trips or reduce their frequency. In the past seven months, the performance of the cavities has improved significantly. We present here our analysis of some of the trips and their underlying causes and discuss improvements carried out.