A New Method for Compensation and Rematch of Cavity Failure in C-ADS Linac

For proton linear accelerators used in applications such as C-ADS, due to the nature of the operation, it is essential to have beam failures at the rate several orders of magnitude lower than usual performance of similar accelerators. A fault-tolerant mechanism should be mandatorily imposed in order to maintain short recovery time, high uptime and extremely low frequency of beam loss. This paper proposes an innovative and challenging way to use fast electronic devices and Field Programmable Gate Array (FPGA) instead of embedded computers to complete the computation of beam dynamics. The method of building an equivalent model and optimizing using genetic algorithm is shown. Eventually, the results based on the model and algorithm are compared with TRACEWIN simulation to show the precision and correctness of the mechanism.