A new method for compensation and rematch of cavity failure in the C-ADS linac

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Zhou Xue, Jian-Ping Dai and Cai Meng. A new method for compensation and rematch of cavity failure in the C-ADS linac[J]. Chinese Physics C, 2016, 40(6): 067003. doi: 10.1088/1674-1137/40/6/067003
Zhou Xue, Jian-Ping Dai and Cai Meng. A new method for compensation and rematch of cavity failure in the C-ADS linac[J]. Chinese Physics C, 2016, 40(6): 067003.  doi: 10.1088/1674-1137/40/6/067003 shu
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Received: 2015-10-08
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    Supported by China ADS Project (XDA03020600) and Natural Science Foundation of China (11575216)

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A new method for compensation and rematch of cavity failure in the C-ADS linac

    Corresponding author: Jian-Ping Dai,
  • 1. University of Chinese Academy of Sciences, Beijing 100049, China
  • 2. Institute of High Energy Physics(IHEP), Chinese Academy of Sciences, Beijing 100049, China
  • 3.  Institute of High Energy Physics(IHEP), Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by China ADS Project (XDA03020600) and Natural Science Foundation of China (11575216)

Abstract: For proton linear accelerators used in applications such as accelerator-driven systems, due to the nature of the operation, it is essential for the beam failure rate to be 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 for compensation and rematch of cavity failure using fast electronic devices and Field Programmable Gate Arrays (FPGAs) instead of embedded computers to complete the computation of beam dynamics. A method of building an equivalent model for the FPGA, with optimization using a genetic algorithm, is shown. Results based on the model and algorithm are compared with TRACEWIN simulation to show the precision and correctness of the mechanism.

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