WEPP24 　ポスターセッション①　 9月2日 ポスター会場 12:40-14:40

SuperKEKBにおけるイベントシステム診断

The fault analysis of timing system in SuperKEKB

○王 迪（総研大　加速器科学），佐藤 政則，古川 和朗，梶 裕志，杉村 仁志（高エネルギー加速器研究機構）

○Di Wang (SOKENDAI Accelerator Science), Masanori Satoh, Kazuro Furukawa, Hiroshi Kaji, Hitoshi Sugimura (High Energy Accelerator Research Organization (KEK))

The high availability of an accelerator timing system is of great significance for the operation of the SuperKEKB electron-positron collider. To distribute the high precision level trigger signals for synchronizing all the relevant components in the accelerator complex, event based timing system is utilized to control the injection procedure in SuperKEKB. Another critical challenge of the timing system is to control the bucket selection of both electron and positron beam bunch. The failure in timing system would definitely affect other systems like pulsed magnet, BPM and so on, and as a consequence leading an unfavourable impact on the effectiveness of the particles collide. Additionally, a newly built positron damping ring decrease the positron emittance but meanwhile brings higher complexity of the bucket selection. In this paper, we will demonstrate the algorithm of the timing system and introduce our fault analysis system which helps up to analyze the timing error, improve the accelerator operation stability.