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CMS Conference Reports

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2020-09-10
19:08
Recording and reconstructing 10 billion unbiased b hadron decays in CMS / Bainbridge, Robert (Imperial Coll., London) /CMS Collaboration
The CMS experiment has recorded a high-purity sample of 10 billion unbiased b hadron decays. The CMS trigger and data acquisition systems were configured to deliver a custom data stream at an average throughput of 2 GB/s, which was parked prior to reconstruction. [...]
CMS-CR-2020-081.- Geneva : CERN, 2020 - 9 p. Fulltext: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019

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2020-08-31
14:07
The Phase 2 Upgrade of the CMS Outer Tracker / Roy Chowdhury, Suvankar (INFN, Pisa ; Pisa, Scuola Normale Superiore) /CMS Collaboration
The Large Hadron Collider\,(LHC), at CERN will undergo major upgrades to be able to deliver peak instantaneous luminosities of about $5-7.5\times 10^{34}~\mathrm{cm}^{-2}\mathrm{s}^{-1}$ by 2027. This High Luminosity upgrade of the LHC (HL-LHC) is expected to deliver a total of about $3000-4000~\mathrm{fb}^{-1}$ during ten years of operation. [...]
CMS-CR-2020-052.- Geneva : CERN, 2020 - 13 p. Fulltext: PDF;
In : 12th international "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Hiroshima, Japan, 14 - 18 Dec 2019

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2020-08-31
14:07
Development of Planar Pixel Sensors for the CMS Inner Tracker at the High-Luminosity LHC / Steinbrueck, Georg (Hamburg U.)
The LHC is planning an upgrade program which will bring the luminosity up to about $7.5\times10^{34}\,$cm$^{-2}$s$^{-1}$ in 2027, with the goal of delivering an integrated luminosity of 3000 or even 4000~fb$^{-1}$ by the end of 2037. This High Luminosity phase, HL-LHC, will present new challenges of higher data rates and unprecedented radiation levels for the pixel detector. [...]
CMS-CR-2020-073.- Geneva : CERN, 2020 - 7 p. Fulltext: PDF;
In : 12th international "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Hiroshima, Japan, 14 - 18 Dec 2019

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2020-08-31
14:07
Serial powering in four-chip prototype RD53A modules for Phase 2 upgrade of the CMS pixel detector / Perovic, Vasilije (Zurich, ETH)
Serial powering is the baseline choice for the upgrade of the CMS pixel detector for the High Luminosity LHC. The first results with the four-chip prototype pixel detector modules based on the demonstrator \SI{65}{nm} CMOS technology RD53A chip are presented. [...]
CMS-CR-2020-047.- Geneva : CERN, 2020 - 16 p. Fulltext: PDF;
In : 12th international "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Hiroshima, Japan, 14 - 18 Dec 2019

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2020-07-09
12:11
The CMS Tracker Upgrade for the High Luminosity LHC / Paoletti, Simone (INFN, Florence) /CMS Collaboration
The LHC machine is planning an upgrade program which will smoothly bring the instantaneous luminosity to about $\mathrm{5 - 7.5 \times 10^{34} cm^{-2}s^{-1}}$ in 2028, to reach an integrated luminosity of $\mathrm{3000 \ fb ^{-1}}$ and possibly up to $\mathrm{4500 \ fb ^{-1}}$ by the end of 2039. This High Luminosity LHC scenario, HL-LHC, will require an upgrade program of the LHC detectors known as Phase-2 upgrade. [...]
CMS-CR-2019-253.- Geneva : CERN, 2019 - 8 p. Fulltext: PDF;
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

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2020-07-09
12:11
Development of an Optical Readout Hybrid for the CMS Outer Tracker Upgrade / Rasevic, Nikola (VINCA Inst. Nucl. Sci., Belgrade) ; Blanchot, Georges (CERN) ; Baron, S ; Kovacs, Mark Istvan (CERN) ; Kulis, S ; Porret, D ; Zografos, Angelos (Natl. Tech. U., Athens)
The pixel-strip modules for the CMS Tracker Phase-2 Upgrade for the HL-LHC integrate a readout hybrid (PS-ROH) for the control and data acquisition link. This hybrid is based on the new, low power and compact gigabit transceiver (LpGBT) and the versatile transceiver VTRx+ specifically designed for the upgrade. [...]
CMS-CR-2019-222.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF;
In : TWEPP 2019 Topical Workshop on Electronics for Particle Physics, Santiago De Compostela, Spain, 2 - 6 Sep 2019

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2020-06-11
09:47
Prototype module construction for the high luminosity upgrade of the CMS pixel detector / Ristic, Branislav (Zurich, ETH) /CMS Collaboration
With the planned upgrades of the LHC towards high luminosity operation, the entire CMS silicon tracker will be replaced in order to cope with the resulting elevated pileup and radiation levels. To fulfill these requirements for the CMS pixel detector, a new readout chip was developed by the RD53 collaboration in 65\,nm CMOS technology, featuring a higher readout bandwidth along with increased granularity and radiation tolerance. [...]
CMS-CR-2019-303.- Geneva : CERN, 2019 - 8 p. Fulltext: PDF;
In : Vertex 2019: 28th International Workshop on Vertex Detectors, Lopud Island, Croatia, 13 - 18 Oct 2019

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2020-06-11
09:47
MPA-SSA, design and test of a 65 nm ASIC-based system for particle tracking at HL-LHC featuring on-chip particle discrimination / Ceresa, Davide (CERN) ; Bergamin, Gianmario (CERN) ; Caratelli, Alessandro (CERN) ; Jan Kaplon ; Kloukinas, Konstantinos (CERN) ; Scarfi', Simone (CERN) ; Yusuf Leblebici
Particle tracking detectors for High Energy Physics need a new readout technique to cope with the increase of the collision rate foreseen for the High Luminosity LHC upgrade. In particular, the selection of interesting physics events at the first trigger stage becomes extremely challenging at high luminosity, not only because of the rate increase, but also because the selection algorithms become inefficient in high pileup conditions. [...]
CMS-CR-2019-302.- Geneva : CERN, 2019 - 4 p. Fulltext: PDF;
In : 2019 IEEE Nuclear Science Symposium (NSS) and Medical Imaging Conference (MIC), Manchester, United Kingdom, 26 Oct - 2 Nov 2019

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2020-06-11
09:47
Characteristics and Performance of RD53A Readout Chip Equipped with Small-pixel Silicon Sensors / Ebrahimi, Aliakbar (Hamburg U.)
The luminosity of the Large Hadron Collider (LHC) at CERN will be upgraded by a factor of seven to 7.5 $\times$ 10$^{\text{34}}$ cm${^\text{-2}}$s$^{\text{-1}}$, hence boosting the physics potential of its experiments. The increased luminosity leads to a higher rate of proton-proton interactions, in the order of 200 events per bunch crossing and a larger dose and fluence. The CMS experiment will upgrade many of its sub-detectors in order to cope with the new experimental conditions. [...]
CMS-CR-2019-299.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF;
In : 2019 IEEE Nuclear Science Symposium (NSS) and Medical Imaging Conference (MIC), Manchester, United Kingdom, 26 Oct - 2 Nov 2019

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2020-04-20
15:31
Powering of the CMS Phase-2 Upgraded Tracker / Cassese, Antonio (INFN, Florence) /CMS Collaboration
The LHC machine will be upgraded to increase its peak luminosity and targeting an integrated luminosity of $3000 \div 4500\;$fb$^{-1}$ in 10 years. The CMS experiment will be upgraded to meet new challenges such as unprecedented radiation environment, demanding high resilience, and increased number of events per bunch crossing, requiring higher detector granularity. Consequently, both the Outer Tracker (OT) and Inner Tracker (IT) will have to fulfill very stringent requirements also in the power distribution to the front-end electronics: the OT (more than $13000$ independent modules) will use in situ DC/DC converters to parallel distribute $100\,kW$ of power, while the IT will use a serial powering scheme to provide about $50\,kW$ to thousands of modular units..
CMS-CR-2019-193.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF;
In : TWEPP 2019 Topical Workshop on Electronics for Particle Physics, Santiago De Compostela, Spain, 2 - 6 Sep 2019

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