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Description
The China Spallation Neutron Source (CSNS) delivers a pulsed neutron beam at a 25Hz repetition rate, necessitating precise data synchronization for effective beam state analysis and fault diagnosis. This work presents the development of a Beam-Synchronized Data Acquisition (BSDAQ) system tailored for the CSNS accelerator. The BSDAQ system is engineered to selectively capture critical operational data, thereby enhancing the understanding and optimization of accelerator performance. To address the challenges of network bandwidth and data storage constraints, the system adopts a trigger-based data collection strategy. It features dual modes of operation: a periodic trigger for consistent data sampling and a random trigger for capturing data during specific events. The system ensures high-precision data capture, timestamping, and alignment with the beam pulse cycle, followed by storage in database. An intuitive interface for data access is also integrated to support in-depth offline analysis. The prototype BSDAQ has been successfully deployed at the CSNS, revealing previously undetectable phenomena such as intra-pulse beam chopping and automatic beam recovery post fast protection system activation. These insights are pivotal for advancing beam control strategies and bolstering the reliability of the accelerator's operations.
