L1 track finding for a time multiplexed trigger
L1 track finding for a time multiplexed trigger
复制标题
时分复用触发器的 L1 轨迹查找
DOI：
10.1016/j.nima.2015.09.117
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Cieri D
中科院分区：
文献类型：
--
作者：
Cieri D
在HL-LHC中，质子束每隔25纳秒交叉一次，平均每束交叉产生140磅的碰撞。为了在这样的环境中运行，CMS实验将需要一个L1硬件触发器，能够在12.5 μs的延迟内识别感兴趣的事件。未来的L1触发器还将利用来自硅跟踪器的数据来控制触发速率。未来用于处理跟踪器数据的架构仍在讨论中。一个有趣的建议是利用时间复用触发器概念，已经在CMS量热计触发器中实现了第一阶段触发器升级。提出了一种基于霍夫变换的航迹查找算法。该算法已使用模拟pp碰撞数据进行了测试。结果表明，该方法具有良好的跟踪效率。该算法将在未来几个月内使用MP7在硬件上进行演示，MP7是一个μTCA板，具有强大的FPGA，能够处理接近1 Tb/s的数据速率。
At the HL-LHC, proton bunches will cross each other every 25 ns, producing an average of 140 pp-collisions per bunch crossing. To operate in such an environment, the CMS experiment will need a L1 hardware trigger able to identify interesting events within a latency of 12.5 μs. The future L1 trigger will make use also of data coming from the silicon tracker to control the trigger rate. The architecture that will be used in future to process tracker data is still under discussion. One interesting proposal makes use of the Time Multiplexed Trigger concept, already implemented in the CMS calorimeter trigger for the Phase I trigger upgrade. The proposed track finding algorithm is based on the Hough Transform method. The algorithm has been tested using simulated pp-collision data. Results show a very good tracking efficiency. The algorithm will be demonstrated in hardware in the coming months using the MP7, which is a μTCA board with a powerful FPGA capable of handling data rates approaching 1 Tb/s.