Year: 2009
Type: preprint
Abstract: 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.
Source: arXiv (Cornell University)
Authors: Annovi, A., Beretta, M., Bossini, E., Boveia, A., Brubaker, E., Canelli, F., Cavasinni, V., Crescioli, F., DeBerg, H., Dell'Orso, M., Dunford, M., Franklin, M., Giannetti, P., Kapliy, A., Kim, Y. K., Kimura, N., Laurelli, P., McCarn, A., Melachrinos, C., Mills, C., Neubauer, M., Proudfoot, J., Piendibene, M., Punzi, G., Sarri, F., Sartori, L., Shochet, M., Tripiccione, L., Tuggle, J., Vivarelli, I., Volpi, G., Yorita, K., Zhang, J.
Institutions: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, University of Chicago, University of Illinois Urbana-Champaign, Harvard University, Waseda University, Argonne National Laboratory, Marie Curie, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1525401280