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arXiv 0910.1126physics.ins-dethep-ex
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FTK体系结构的开发:用于ATLAS检测器的快速硬件跟踪触发器

Development of FTK architecture: a fast hardware track trigger for the ATLAS detector

A. Annovi, M. Beretta, E. Bossini, A. Boveia, E. Brubaker, F. Canelli, V. Cavasinni, F. Crescioli, H. DeBerg, M. Dell'Orso, M. Dunford, M. Franklin, P. Giannett… 展开作者

A. Annovi, M. Beretta, E. Bossini, A. Boveia, E. Brubaker, F. Canelli, V. Cavasinni, F. Crescioli, H. DeBerg, M. Dell'Orso, M. Dunford, M. Franklin, P. Giannetti, A. Kapliy, Y. K. Kim, N. Kimura, P. Laurelli, A. McCarn, C. Melachrinos, C. Mills, M. Neubauer, J. Proudfoot, M. Piendibene, G. Punzi, F. Sarri, L. Sartori, M. Shochet, L. Tripiccione, J. Tuggle, I. Vivarelli, G. Volpi, K. Yorita, J. Zhang

摘要:

快速跟踪器(FTK)是ATLAS触发系统的拟议升级,它将以完整的1级输出速率运行,并在2级处理开始时在整个探测器上提供高质量的重建轨迹。FTK通过利用关联存储器(AM)的大规模并行性来解决跟踪所固有的组合挑战,该关联存储器可以同时将内部检测器命中与数百万个预先计算的模式进行比较。通过使用预先计算的线性化拟合常数并利用现代商业FPGA中的快速DSP,进一步简化了匹配模式内的跟踪问题。总的来说,FTK能够计算事件中所有轨道的螺旋参数,并在大约一毫秒内应用高质量的切割。通过采用流水线架构,FTK能够以Level-1速率连续工作而没有死区时间。系统设计的定义和研究使用ATLAS全仿真。重建质量评估为零堆积的单个μ子事件,以及WH事件在LHC设计光度。FTK的结果进行了比较与离线算法的跟踪能力。

英文摘要:

The Fast Tracker (FTK) is a proposed upgrade to the ATLAS trigger system that will operate at full Level-1 output rates and provide high quality tracks reconstructed over the entire detector by the start of processing in Level-2. FTK solves the combinatorial challenge inherent to tracking by exploiting the massive parallelism of Associative Memories (AM) that can compare inner detector hits to millions of pre-calculated patterns simultaneously. The tracking problem within matched patterns is further simplified by using pre-computed linearized fitting constants and leveraging fast DSP's in modern commercial FPGA's. Overall, FTK is able to compute the helix parameters for all tracks in an event and apply quality cuts in approximately one millisecond. By employing a pipelined architecture, FTK is able to continuously operate at Level-1 rates without deadtime. The system design is defined and studied using ATLAS full simulation. Reconstruction quality is evaluated for single muon events with zero pileup, as well as WH events at the LHC design luminosity. FTK results are compared with the tracking capability of an offline algorithm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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