论文标题
Belle II像素检测器的数据处理集线器读数系统的性能
Performance of the Data Handling Hub readout system for the Belle II pixel detector
论文作者
论文摘要
自2019年3月以来，日本Tsukuba的SuperKekb加速器为Belle II实验提供E $^+$ e $^ - $ beams。要处理针对目标的峰值光度比在Belle录制的目标峰值亮度高40倍，这是已安装了基于DEPFET技术的Pixel检测器的Belle。它的长度集成时间为20 $ $ s，导致预期数据速率为20 gbyte/s（160 Gbit/s），最大占用率为3％。为了处理大量数据，已经开发了数据处理中心（DHH）。它包含用于控制和读数检测器的所有必要功能。在本文中，我们描述了DHH系统的架构和功能。此外，我们将在运行一年后展示关键的性能特征。
The SuperKEKB accelerator in Tsukuba, Japan is providing e$^+$e$^-$ beams for the Belle II experiment since March 2019. To deal with the aimed peak luminosity being forty times higher than the one recorded at Belle, a pixel detector based on DEPFET technology has been installed. It features a long integration time of 20 $μ$s resulting in an expected data rate of 20 GByte/s (160 GBit/s) at a maximum occupancy of 3 %. To deal with this high amount of data, the data handling hub (DHH) has been developed. It contains all necessary functionality for the control and readout of the detector. In this paper we describe the architecture and features of the DHH system. Further we will show the key performance characteristics after one year of operation.
