CERN Accelerating science

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1.
R&D; of the cluster finding algorithm for CMS iRPC detector / CMS Muon Collaboration
The Compact Muon Solenoid (CMS) experiment will undergo phase-II upgrade to enhance the capacity of detectors in the High-Luminosity Large Hadron Collider era. An important extension involves the installation of the Improved Resistive Plate Chambers (iRPC) in the most forward part of the endcap muon system. [...]
2024 - 12 p. - Published in : JINST 19 (2024) T12001
2.
Prototype Design of Global Common Module for ATLAS Experiment’s Phase-II Upgrade / Tang, S (Brookhaven) ; Bonini, F (Brookhaven ; CERN) ; Begel, M (Brookhaven) ; Benoit, M (Brookhaven ; Oak Ridge) ; Chen, H (Brookhaven) ; Filimonov, V (Mainz U., Inst. Phys.) ; Lucca, F (Buenos Aires, CONICET) ; Matakias, D (Brookhaven) ; Qian, W (Rutherford) ; Sankey, D (Rutherford) et al.
A new Global Trigger subsystem will be installed in the Level-0 Trigger as part of the High-Luminosity Large Hadron Collider (HL-LHC) upgrade of ATLAS during the upcoming Long-Shutdown 3. It will feature new and improved trigger hardware and algorithms, and an increased maximum output rate of 1 MHz. [...]
2023 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 70 (2023) 2248-2255 External link: accepted manuscript
3.
Data Preparation And Optimization For Real Time Track Reconstruction On The ATLAS HTT PRM Board / Axiotis, Konstantinos (Geneva U. ; CERN) /ATLAS TDAQ Collaboration
Custom hardware boards for pattern recognition have been developed for the fast reconstruction of charged particle tracks at the ATLAS experiment for the High-Luminosity LHC upgrade. The Pattern Recognition Mezzanine (PRM), part of the Hardware Tracking for the Trigger system, is one of the boards where track fitting and track reconstruction is being performed using linearized algorithms in an Intel Stratix 10MX FPGA. [...]
2023 - 4 p. - Published in : 10.1109/MOCAST57943.2023.10176377
In : MOCAST 2023, Athens, Greece, 28 - 30 Jun 2023
4.
New readout electronics for ATLAS ZDC detector / Korcyl, K (Cracow, INP) /ATLAS ZDC Collaboration
The ATLAS ZDC detectors located in the LHC tunnel detect far-forward neutrons emerging from interactions during proton-proton or lead-lead collisions. PMT signals are transferred over the 200 m long fast air-core cable to the electronics room. [...]
2022 - 7 p. - Published in : JINST 17 (2022) C12011
In : Topical Workshop on Electronics for Particle Physics 2022 (TWEPP 2022), Bergen, Norway, 19 - 23 Sep 2022, pp.C12011
5.
System design and prototyping for the CMS Level-1 Trigger at the High-Luminosity LHC / Herwig, C (Fermilab) /CMS Collaboration
For the High-Luminosity Large Hadron Collider, the trigger and data acquisition system of the CMS experiment will be entirely replaced. Novel design choices have been explored, including ATCA prototyping platforms with SoC controllers and newly available interconnect technologies with serial optical links with data rates up to 28 Gb/s. [...]
2023 - 7 p. - Published in : JINST 18 (2023) C01021
In : Topical Workshop on Electronics for Particle Physics 2022 (TWEPP 2022), Bergen, Norway, 19 - 23 Sep 2022, pp.C01021
6.
Particle flow reconstruction for the CMS Phase-II Level-1 Trigger / Herwig, C (Fermilab) /CMS Collaboration
The upgrade of the CMS detector for the high-luminosity LHC will include track-finding for the first time in the Level-1 trigger, enabling Particle Flow reconstruction of every event in addition to comprehensive pileup mitigation. The Correlator trigger will reconstruct isolated leptons and photons, hadronic jets, and energy sums, assisted in many cases by machine learning to benefit from the complete particle-level event record. [...]
2023 - 6 p. - Published in : JINST 18 (2023) C01037
In : Topical Workshop on Electronics for Particle Physics 2022 (TWEPP 2022), Bergen, Norway, 19 - 23 Sep 2022, pp.C01037
7.
Performance of the NA62 trigger system / NA62 Collaboration
The NA62 experiment at CERN targets the measurement of the ultra-rare $K^+ \to \pi^+ \nu \bar\nu$ decay, and carries out a broad physics programme that includes probes for symmetry violations and searches for exotic particles. Data were collected in 2016–2018 using a multi-level trigger system, which is described highlighting performance studies based on 2018 data..
arXiv:2208.00897; CERN-EP-2022-165.- Geneva : CERN, 2023-03-17 - 20 p. - Published in : JHEP 2303 (2023) 122 Draft (restricted): PDF; Fulltext: CERN-EP-2022-165 - PDF; document - PDF; 2208.00897 - PDF;
8.
Concepts and design of the CMS high granularity calorimeter Level 1 trigger / Ahuja, Sudha (Ecole Polytechnique) /CMS Collaboration
The CMS collaboration has chosen a novel high granularity calorimeter for the endcap regions as part of its planned upgrade for the high luminosity LHC. The calorimeter will have fine segmentation in both the transverse and longitudinal directions and will be the first such calorimeter specifically optimised for particle-flow reconstruction to operate at a colliding-beam experiment. [...]
CMS-CR-2020-067.- Geneva : JINST, 2020 - 6 p. - Published in : JINST 15 (2020) C06016 Fulltext: PDF;
In : 3rd Conference on Calorimetry for the High Energy Frontier, Fukuoka, Japan, 25 - 29 Nov 2019, pp.C06016
9.
The Phase-2 Upgrade of the Hardware Trigger of CMS at the LHC / Jeitler, M (Vienna, OAW) /CMS Collaboration
The CMS experiment uses a two-level triggering system consisting of the Level-1, instrumented by custom-design hardware boards, and the High Level Trigger, a streamlined version of the offline reconstruction software running on a computer farm. The upgrade of the collider to the “High-Luminosity LHC”, which will deliver a luminosity of 5−7.5 × 10$^{34}$  cm$^{-2}$ s $^{-1}$, corresponding to 140–200 pileup events, also necessitates a complete upgrade of the trigger system to make optimal use of the data. [...]
2020 - 13 p. - Published in : JINST 15 (2020) C09009
In : Instrumentation for Colliding Beam Physics, Novosibirsk, Russia, 24 - 28 Feb 2020, pp.C09009
10.
The ATLAS 
Inner Detector trigger performance 
in pp collisions at 13 TeV during LHC Run 2 / Grandi, Mario (University of Sussex) /ATLAS Collaboration
The Inner Detector (ID) trigger plays an essential role in the ATLAS trigger system, enabling the high purity reconstruction of physics objects - electron, tau, muon, bjet candidates etc…, providing access to regions of the phase space populated by these objects which span a wide range of kinematic regimes. These are essential for the core physics programme at ATLAS: Standard Model measurements; Flavour physics; and Beyond the Standard Model searches. [...]
ATL-DAQ-SLIDE-2020-309.- Geneva : CERN, 2020 - 16 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 40th International Conference on High Energy Physics, Prague, Czech Republic, 28 Jul - 6 Aug 2020

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