Minimizing Dead Time of the Belle II Data Acquisition System With Pipelined Trigger Flow Control
Minimizing Dead Time of the Belle II Data Acquisition System With Pipelined Trigger Flow Control
复制标题
通过流水线触发流量控制最大限度地减少 Belle II 数据采集系统的死区时间
DOI：
10.1109/tns.2013.2264727
复制
发表时间：
2013
影响因子：
1.8
通讯作者：
Tomohisa Uchida
中科院分区：
文献类型：
--
作者：
Mikihiko Nakao;Cholong Lim;Markus Friedl;Tomohisa Uchida
SuperKEKB对撞机上的Belle II探测器是一台通用光谱仪，用于研究B介子、Charm强子和τ轻子的衰变，其光度达到前所未有的8×1035 cm-2s-1。在Belle II，探测器信号在探测器内部或附近数字化，并通过高速光纤串行链路收集。最大设计触发频率为30 kHz，为此，我们必须以最小死区比例记录7个子探测器的数据。由于Belle II子探测器前端电子学的复杂约束，直接的死区控制方法不能满足我们的要求。我们报告了一种流水线触发流控制方案，该方案将由于触发分布和读出系统而导致的死区时间比例保持在1%左右。
The Belle II detector at the SuperKEKB collider is a general purpose spectrometer to study B meson, charm hadron and τ lepton decays with an unprecedented high luminosity of 8 × 1035cm-2s-1. At Belle II, detector signals are digitized inside or near the detector and collected via high-speed optical serial links. The maximum design trigger rate is 30 kHz, for which we have to record data from 7 subdetectors with a minimum dead-time fraction. Due to complex constraints in the front-end electronics of the Belle II subdetectors, a straightforward dead-time control method does not meet our requirement. We report a pipelined trigger flow control scheme which will keep the dead-time fraction due to the trigger distribution and readout system to about 1%.