Lifetime Prediction of a Linear Transformer Driver Based on the Storage Capacitor Voltage Reversal Longevity

In this paper, the mathematical lifetime models of capacitors and spark switches are investigated and a linear transformer driver circuit model consisting of five 100 kV/MA cavities is built. The effect of random failures, switch jitter and prefire probability, on the module lifetime is investigated, respectively, by observing the influence on the capacitor lifetime and module output. Sensitivity analysis of time delay jitter of switches and prefire probability of switches on the module lifetime is carried out. The module lifetime prediction model is built by the combination of the lifetime model of key components, random failure model, and the module circuit model. Examples are taken to illustrate the process of module lifetime prediction and maintenance cycle determination.