Hardware Demonstrator of a Level-1 Track Finding Algorithm with FPGAs for the Phase II CMS Experiment

17th International Workshop on Advanced Computing and Analysis Techniques in Physics Research

物理学;计算机科学

Cieri, D.^1,2

University of Bristol, Bristol, United Kingdom^1

Rutherford Appleton Laboratory, Didcot, United Kingdom^2

关键词: Bunch crossings;    Finding algorithm;    Hardware demonstrator;    Hardware trigger;    Pp collisions;    Silicon tracker;    Track trigger;    Transform methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/762/1/012020/pdf
DOI  :  10.1088/1742-6596/762/1/012020

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

At the HL-LHC, proton bunches collide every 25 ns, producing an average of 140 pp interactions per bunch crossing. To operate in such an environment, the CMS experiment will need a Level-1 (L1) hardware trigger, able to identify interesting events within a latency of 12.5 μs. This novel L1 trigger will make use of data coming from the silicon tracker to constrain the trigger rate. Goal of this new track trigger will be to build L1 tracks from the tracker information. The architecture that will be implemented in future to process tracker data is still under discussion. One possibility is to adopt a system entirely based on FPGA electronic. The proposed track finding algorithm is based on the Hough transform method. The algorithm has been tested using simulated pp collision data and it is currently being demonstrated in hardware, using the "MP7", which is a μTCA board with a powerful FPGA capable of handling data rates approaching 1 Tb/s. Two different implementations of the Hough transform technique are currently under investigation: one utilizes a systolic array to represent the Hough space, while the other exploits a pipelined approach.