CERN Accelerating science

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1.
Data Reduction of the strip detector of the CMS Experiment for heavy ion collisions and proton-proton collisions /CMS Collaboration
Reducing event and data sizes is critical for experiments at the LHC, where high collision rates and increased detector granularity rapidly increase storage and processing requirements. In the CMS experiment, a recent development to address this challenge is the "Raw'" format: a new approach for recording silicon strip data in which only the reconstructed cluster's barycenter and average charge are stored, rather than the analog-to-digital converter counts from every strip. [...]
CMS-DP-2025-031; CERN-CMS-DP-2025-031.- Geneva : CERN, 2025 - 27 p. Fulltext: PDF;
2.
Anomaly detection for the CMS Pixel Barrel Data Quality with Machine Learning models /CMS Collaboration
CMS Offline Data Quality relies on the human inspection of hundreds of histograms, to classify data as Good or Bad for physics analyses. However, this process is prone to human error, such as oversights, misinterpretations, or subjective assessments. [...]
CMS-DP-2025-030; CERN-CMS-DP-2025-030.- Geneva : CERN, 2025 - 15 p. Fulltext: PDF;
3.
CMS Tracker Alignment Performance Results for 2024 Data Taking and Early Reprocessing /CMS Collaboration
The tracking system of the CMS experiment is the world's largest silicon tracker with its 1856 and 15148 silicon pixel and strip modules, respectively. To accurately reconstruct trajectories of charged particles the position, rotation, and curvature of each module must be corrected such that the alignment resolution is smaller than, or comparable to, the hit resolution. [...]
CMS-DP-2025-029; CERN-CMS-DP-2025-029.- Geneva : CERN, 2025 - 31 p. Fulltext: PDF;
4.
Hybrid production status of the CMS Outer Tracker for the Phase-2 Upgrade / Martin Lipinski of the CMS Collaboration /CMS Collaboration
The CMS Collaboration will exchange the whole silicon tracking system as part of the Phase-2 Upgrade. About 8000 two co-planar strip sensor (2S) modules and 5880 macro-pixel and strip sensor (PS) modules will be built for the new Outer Tracker, requiring 47520 hybrid circuits. [...]
CMS-CR-2025-108.- Geneva : CERN, 2025 - 4 p. Fulltext: PDF;
In : 17th Vienna Conference on Instrumentation (VCI2025), Vienna, Austria, 17 - 21 Feb 2025
5.
Design and construction of the Outer Tracker for the CMS Phase-2 Upgrade / Zoi, Irene (Fermilab) /CMS Collaboration
The High-Luminosity LHC (HL-LHC) is expected to deliver an integrated luminosity of 3000--4000~fb$^{-1}$ over 10 years of operation with the peak instantaneous luminosity reaching about \mbox{5--7.5$\times10^{34}$cm$^{-2}$\,s$^{-1}$}. During Long Shutdown 3, several components of the CMS detector will undergo major improvements, called Phase-2 upgrades, to be able to operate in the challenging environment of the HL-LHC. [...]
CMS-CR-2025-081.- Geneva : CERN, 2025 - 5 p. Fulltext: PDF;
In : 17th Vienna Conference on Instrumentation (VCI2025), Vienna, Austria, 17 - 21 Feb 2025
6.
CMS Inner Tracker Upgrade for the HL-LHC Design, Development, and Production Status / Kuo, Chin-chia (Hamburg U.) /CMS Collaboration
The High Luminosity Large Hadron Collider operation will push the CMS experiment to its limits, with an instantaneous peak luminosity of $7.5 \times 10^{34} \, \text{cm}^{-2}\text{s}^{-1}$ and an integrated luminosity of $300 \, \text{fb}^{-1}$ per year. This environment will expose the CMS Inner Tracker (IT) pixel detector at the center of CMS to unprecedented levels of radiation, with a 1 MeV neutron equivalent fluence of $\Phi_{\text{eq}} = 2.6 \times 10^{16} \, \text{cm}^{-2}$ and a total ionizing dose of $13 \, \text{MGy}$ after $3000 \, \text{fb}^{-1}$ of integrated luminosity. [...]
CMS-CR-2025-084.- Geneva : CERN, 2025 - 5 p. - Published in : Nucl.Instrum.Meth.A 1080 (2025) 170696 Fulltext: PDF; Preprint: PDF;
In : 17th Vienna Conference on Instrumentation (VCI2025), Vienna, Austria, 17 - 21 Feb 2025, pp.170696
7.
Untersuchung von korreliertem Rauschen in 2S-Siliziumstreifenmodulen fuer das CMS Phase-2 Tracker Upgrade / Teroerde, Jan
CMS-TS-2025-002 ; CERN-THESIS-2025-012. - 2025 - 55.

8.
Design and construction of the Outer Tracker for the Phase-2 Upgrade / Zoi, Irene (Fermilab)
The High Luminosity LHC (HL-LHC) is expected to deliver an integrated luminosity of $3000-4000$~fb$^{-1}$ after 10 years of operation with peak instantaneous luminosities reaching about $5-7.5\times10^{34}$cm$^{-2}$s$^{-1}$. During Long Shutdown 3, several components of the CMS detector will undergo major changes, called the Phase-2 upgrade, to be able to operate in the challenging environment of the HL-LHC. [...]
CMS-CR-2025-009.- Geneva : CERN, 2025 - 9 p. Fulltext: PDF;
In : Eleventh International Workshop on Semiconductor Pixel Detectors for Particles and Imaging, Strasbourg, Grand Est, Fr, 18 - 22 Nov 2024
9.
Insights gained from test system preparation for the hybrids production for the CMS Phase-2 Outer Tracker / Szydlik, Patryk (CERN)
The Phase-2 Upgrade of the CMS Outer Tracker requires the manufacturing of 8000 Strip-Strip and 5880 Pixel-Strip modules, altogether incorporating 47 520 hybrid circuits of 18 variants. To ensure complete functionality of the modules it is essential to perform production-scale testing of the hybrids before the module assembly. [...]
CMS-CR-2024-288.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF; Publication: PDF;
In : Topical Workshop on Electronics for Particle Physics 2024, Glasgow, United Kingdom, 30 Sep - 4 Oct 2024, pp.C02035
10.
CMS Silicon Strip Tracker Performance Results with Early 2024 Data /CMS Collaboration
The CMS silicon strip tracker consists of inner barrel (TIB) layers, inner discs (TID), outer barrel (TOB) layers, and end-caps (TEC), which close off the tracker on either end. It has been successfully recording data during both Run 1 and Run 2 data taking at the Large Hadron Collider (LHC). [...]
CMS-DP-2024-101; CERN-CMS-DP-2024-101.- Geneva : CERN, 2024 - 16 p. Fulltext: PDF;

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