A time-multiplexed track-trigger for the CMS HL-LHC upgrade
A time-multiplexed track-trigger for the CMS HL-LHC upgrade
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DOI：
10.1016/j.nima.2015.09.075
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发表时间：
2016-07
影响因子：
1.4
通讯作者：
G. Hall
中科院分区：
文献类型：
--
作者：
G. Hall
一种新的 CMS 跟踪器正在开发中，将于 2025 年在高亮度 LHC 上运行。它包括一个基于两种不同类型的特殊模块的外部跟踪器，该模块将使用两个紧密间隔的传感器层中的空间重合簇构建轨道存根，以拒绝低横向动量轨道命中并减少数据传输到 Level-1 触发器之前的数据量。跟踪器数据将用于在专用处理器中重建轨道段，然后再传输到其他触发处理器，其他触发处理器将跟踪器信息与来自量热计和 μ 子探测器的数据相结合，以做出最终的 L1 触发决策。用于在探测器外部处理跟踪器数据的架构正在研究中，使用了几种替代方法。一种有吸引力的可能性是利用时间复用设计，该设计类似于目前在 CMS 热量计触发器中实施的设计，作为第一阶段触发器升级的一部分。解释了新颖的时分复用触发概念，描述了处理未来跟踪器数据的潜在好处，并概述了基于当前现有硬件的可行设计。
A new CMS Tracker is under development for operation at the High Luminosity LHC from 2025. It includes an outer tracker based on special modules of two different types which will construct track stubs using spatially coincident clusters in two closely spaced sensor layers, to reject low transverse momentum track hits and reduce the data volume before data transmission to the Level-1 trigger. The tracker data will be used to reconstruct track segments in dedicated processors before onward transmission to other trigger processors which will combine tracker information with data originating from the calorimeter and muon detectors, to make the final L1 trigger decision. The architecture for processing the tracker data outside the detector is under study, using several alternative approaches. One attractive possibility is to exploit a Time Multiplexed design similar to the one which is currently being implemented in the CMS calorimeter trigger as part of the Phase I trigger upgrade. The novel Time Multiplexed Trigger concept is explained, the potential benefits for processing future tracker data are described and a feasible design based on currently existing hardware is outlined.