2024-11-04
17:59 |
High Multiplicity Trigger for Long-Lived Particles in CMS Detector in 2022 and 2023
/CMS Collaboration
In this note, we present the implementation and performance of a Level-1 Trigger and High Level Trigger on high multiplicity Muon Detector Showers in the Cathode Strip Chambers of the CMS experiment using 2022 and 2023 data, corresponding to an integrated luminosity of 50.8 fb$^-1$..
CMS-DP-2024-099; CERN-CMS-DP-2024-099.-
Geneva : CERN, 2024 - 11 p.
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2024-11-04
17:59 |
Electron Reconstruction and Identification in the CMS Phase-2 Level-1 Trigger
/CMS Collaboration
The CMS Level-1 Trigger (L1T) for the HL-LHC will use powerful FPGA processors connected by a high-bandwidth network of optical fibers. The new system will have access to online tracking, which enables the identification of calorimeter deposits originating from electrons. [...]
CMS-DP-2024-098; CERN-CMS-DP-2024-098.-
Geneva : CERN, 2024 - 20 p.
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2024-11-04
17:59 |
Optimizing cut-based algorithms to specific physics acceptance regions at the CMS Level-1 Trigger
/CMS Collaboration
Developments of the new Level-1 Trigger at CMS for the High-Luminosity Operation of the LHC are in full swing. The Global Trigger, the final stage of this new Level-1 Trigger pipeline, is foreseen to evaluate a menu with hundreds of trigger algorithms, each of which targeting a specific physics signature and acceptance region. [...]
CMS-DP-2024-097; CERN-CMS-DP-2024-097.-
Geneva : CERN, 2024 - 17 p.
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2024-11-04
17:59 |
Level-1 trigger scouting in Phase-2
/CMS Collaboration
Traditional data streams rely on a decision of the Level-1 trigger to accept only a fraction of the events for further processing and selection by the High Level Trigger, followed by an offline analysis of the selected events. Level-1 scouting introduces an alternative path, by analyzing events only based on the Level-1 trigger reconstruction without a preselection. [...]
CMS-DP-2024-096; CERN-CMS-DP-2024-096.-
Geneva : CERN, 2024 - 22 p.
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2024-11-04
17:57 |
Machine learning tools for the automatized monitoring of the CSC detector
/CMS Collaboration
Ensuring the quality of data in large HEP experiments such as CMS at the LHC is crucial for producing reliable physics outcomes, especially in view of the high luminosity phase of the LHC, where the new data taking conditions will demand a much more careful monitoring of the experimental apparatus. The CMS protocols for Data Quality Monitoring (DQM) are based on the analysis of a standardized set of histograms offering a condensed snapshot of the detector's condition. [...]
CMS-DP-2024-095; CERN-CMS-DP-2024-095.-
Geneva : CERN, 2024 - 17 p.
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2024-11-04
17:57 |
CSC GIF++ Longevity study
/CMS Collaboration
Studies of CSC longevity under irradiation in the CERN GIF++ test beam facility are underway. The results show the amount of charge accumulated by the anode wires, the currents in the chamber layers, and dark rates. [...]
CMS-DP-2024-094; CERN-CMS-DP-2024-094.-
Geneva : CERN, 2024 - 10 p.
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2024-11-04
17:57 |
CSC Spatial Resolution with 2018 and 2024 pp collisions data
/CMS Collaboration
Measurements of CSC spatial resolutions in 2024 pp collisions are shown, and compared to measurements in 2018 when the same operational conditions of gas mix and high voltage were used..
CMS-DP-2024-093; CERN-CMS-DP-2024-093.-
Geneva : CERN, 2024 - 5 p.
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2024-11-04
17:57 |
Performance during 2024 collisions in the DT Slice-Test of
new OBDT-theta boards and first BMTL1 ATCA prototype
/CMS Collaboration
The electronics system, which is in charge to produce trigger primitives from the CMS Drift Tube (DT) detector and to read out the detector itself, will not be able to withstand the background rates expected at High Luminosity LHC (HL-LHC) and to handle the expected Level 1 (L1) trigger rates.
A new electronics system has therefore been designed, which will provide improved resolution for L1 trigger (in position, angle, and timing) and high rate capability: the new Front End electronics is based on OBDTs (On Board electronics for DT) while Trigger Primitive (TP) generation is done at the Back-End .
In order to test the new electronics in realistic conditions before the full production, several OBDT prototypes were installed in CMS Wheel+2 Sector 12 and then in the neighboring Sector 1, which presently hosts the latest version, operated in parallel with the legacy system.
This note presents some results on the performance of this new electronics in Sector 1..
CMS-DP-2024-092; CERN-CMS-DP-2024-092.-
Geneva : CERN, 2024 - 9 p.
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2024-11-04
17:57 |
Novel data analysis and detector monitoring tools for the CMS muon Drift Tubes
/CMS Collaboration
This DPS note documents a few recent R\&D; activities aimed at improving the Drift Tubes performance monitoring and analysis workflows. In particular, it explores the possibility of integrating high-precision offline analyses, currently run by hand, within the CMS Automation Framework and investigates the benefits of deploying similar programs into high-throughput Analysis Facilities in order to process, at once, amounts of data of the order of few 100 $\mathrm{fb}^{-1}$. [...]
CMS-DP-2024-091; CERN-CMS-DP-2024-091.-
Geneva : CERN, 2024 - 13 p.
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2024-11-04
17:57 |
Performance of the new OBDT electronics installed in the DT Slice Test
/CMS Collaboration
The DT upgrade for High Luminosity LHC (HL-LHC) mostly targets the Front-End and the Back-End electronics.
The present system, handling trigger and readout, will not be able to withstand the expected background rate at HL-LHC and to handle the maximal Level-1 (L1) Trigger rate up to 750 kHz. [...]
CMS-DP-2024-090; CERN-CMS-DP-2024-090.-
Geneva : CERN, 2024 - 6 p.
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