Level-1 track finding with an all-FPGA system at CMS for the HL-LHC

James, T.

doi:10.22323/1.340.0202

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…All approaches were successful in delivering tracks to the L1 trigger system within the allowed latency of 4 µs. A hybrid approach of combining two of those algorithms is currently being explored by the CMS Collaboration [16].…”

Section: Ot Modulesmentioning

confidence: 99%

The Phase-2 Upgrade of the CMS Outer Tracker

Chowdhury

2020

Nuclear Instruments and Methods in Physics Research Section A:

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The Large Hadron Collider (LHC), at CERN will undergo major upgrades to be able to deliver peak instantaneous luminosities of about 5 − 7.5 × 10 34 cm −2 s −1 by 2027. This High Luminosity upgrade of the LHC (HL-LHC) is expected to deliver a total of about 3000 − 4000 fb −1 during ten years of operation. At the nominal instantaneous luminosity of the HL-LHC, a single bunch crossing will produce 140−200 proton-proton collisions. The current CMS strip tracker and the CMS Phase-1 pixel detector will not be able to survive the harsh operating conditions of the HL-LHC period. The CMS experiment will install a new silicon tracker for the HL-LHC. The Phase-2 Outer Tracker (OT) will feature increased radiation hardness, higher granularity and track separation and compatibility with higher data rates and a longer trigger latency. In addition, the OT will provide tracking information to the Level-1 trigger, allowing trigger rates to be kept at a sustainable level without sacrificing physics potential. To achieve this, the OT will be made up of modules with two closely spaced sensors read out by a single ASIC. The ASIC will correlate data from both sensors to form short track segments called stubs, to be used in tracking at Level-1. In this contribution, the design of the CMS Phase-2 OT, the technological choices and highlights of the research and development activities will be reported.

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Section: Ot Modulesmentioning

confidence: 99%

The Phase-2 Upgrade of the CMS Outer Tracker

Chowdhury

2020

Nuclear Instruments and Methods in Physics Research Section A:

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“…Figure 6: Track finding efficiency as a function of η (left) and p T (right) for particle with p T > 2 GeV, produced in tt events with PU of 0, 140, 200 (250 and 300 for efficiency vs η). Plots show results with and without the fixed latency cut-off (truncation) included in the simulation [10].…”

Section: Hybrid Solutionmentioning

confidence: 99%

“…DAQ and Level-1 Track Finding for the CMS HL-LHC Upgrade F. Ravera Figure 7: Track finding efficiency as a function of η for muon with p T > 2 GeV (left) and electron with p T > 10 GeV (right) with PU of 0, 140, 200, 250 and 300. Plots show results with and without the fixed latency cut-off (truncation) included in the simulation [10].…”

Section: Pos(vertex2019)048mentioning

confidence: 99%

DAQ and Level-1 Track Finding for the CMS HL-LHC Upgrade

Ravera¹

2020

Proceedings of the 28th International Workshop on Vertex Detectors — PoS(Vertex2019)

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The LHC will be upgraded to the High Luminosity LHC (HL-LHC) in the late 2020s in order to reach an instantaneous luminosity as high as 7 × 10 34 cm −2 s −1 , hence increasing the discovery potential of the machine. In order to preserve physics object performance in spite of large pileup , the CMS detector will be significantly upgraded. A key component of the upgrade is the Outer Tracker detector that will be able to identify tracks with transverse momentum above ∼ 2 GeV/c and provide them to the Track Finder boards, thus maintaining manageable trigger rates and good performance. One of the main challenges of the Level-1 track finding is being able to reconstruct charged particles trajectories from a 40 MHz collision rate with a few microsecond latency budget. Dedicated FPGA hardware systems have been developed for track finding to address this challenge. Another stringent requirement on the Tracker DAQ system is set by the unprecedented number of channels, reaching two billions for the Inner Tracker only. To handle this, the Tracker DAQ back-end boards will be equipped with commercial CPUs that will guarantee the system scalability and ensure an effective monitoring of the detector conditions. The DAQ proposal to handle this distributed computational power as well as the design choices of the Level-1 track finding are presented.

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Level-1 track finding with an all-FPGA system at CMS for the HL-LHC

Cited by 2 publications

References 9 publications

The Phase-2 Upgrade of the CMS Outer Tracker

The Phase-2 Upgrade of the CMS Outer Tracker

DAQ and Level-1 Track Finding for the CMS HL-LHC Upgrade

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