CERN Accelerating science

HL-LHC Conference Papers

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2022-07-01
13:40
Measurement of Excess Noise in Thin Film and Metal Foil Resistor Networks / Beev, Nikolai (CERN)
Low-frequency resistance fluctuations cause excess noise in biased resistors. [...]
CERN-ACC-2022-0010.
- 2022.

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2022-07-01
13:34
A Metrology-grade Digitizer for Power Converters in the High Luminosity Large Hadron Collider / Beev, Nikolai (CERN) ; Cerqueira Bastos, Miguel (CERN) ; Martino, Michele (CERN) ; Valuch, Daniel (CERN)
The High Luminosity Large Hadron Collider project at CERN requires performance improvements in the precision powering of magnets, in particular for the new Nb3Sn based Inner Triplet magnets that provide the final focusing of the hadron beams at the interaction points of the ATLAS and CMS detectors. [...]
CERN-ACC-2022-0009.
- 2022.

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2022-06-28
06:01
Evolution of ATLAS analysis workflows and tools for the HL-LHC era / Cameron, David (Oslo U.) ; Forti, Alessandra (Manchester U.) ; Klimentov, Alexei (Brookhaven Natl. Lab.) ; Pacheco Pages, Andrés (Barcelona, IFAE ; PIC, Bellaterra) ; South, David (DESY)
The High Luminosity LHC project at CERN, which is expected to deliver a ten-fold increase in the luminosity of proton-proton collisions over LHC, will start operation towards the end of this decade and will deliver an unprecedented scientific data volume of multi-exabyte scale. This vast amount of data has to be processed and analysed, and the corresponding computing facilities must ensure fast and reliable data processing for physics analyses by scientific groups distributed all over the world. [...]
2021 - 11 p. - Published in : EPJ Web Conf. 251 (2021) 02002 Fulltext: PDF;
In : 25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021, pp.02002

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2022-06-28
06:01
Preparing for HL-LHC: Increasing the LHCb software publication rate to CVMFS by an order of magnitude / Bocchi, Enrico (CERN) ; Blomer, Jakob (CERN) ; Couturier, Benjamin (CERN) ; Burr, Christopher (CERN) ; van der Ster, Dan (CERN)
In the HEP community, software plays a central role in the operation of experiments’ facilities and for reconstruction jobs, with CVMFS being the service enabling the distribution of software at scale. In view of High Luminosity LHC, CVMFS developers investigated how to improve the publication workflow to support the most demanding use cases. [...]
2021 - 9 p. - Published in : EPJ Web Conf. 251 (2021) 02034 Fulltext: PDF;
In : 25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021, pp.02034

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2022-06-12
06:06
Successful Crabbing of Proton Beams / Calaga, Rama (CERN) /HL-LHC Collaboration
Many future particle colliders require beam crabbing to recover the geometric luminosity loss from the non-zero crossing angle at the interaction point. A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
Geneva : JACoW, 2021 - 6 p. - Published in : JACoW IPAC 2021 (2021) 2510-2515 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2510-2515

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2022-06-04
06:06
Overview and recent results of the CMS muon system upgrade / Aruta, Caterina (Bari U. ; INFN, Bari) /CMS Collaboration
The detectors and electronics of the muon spectrometer of the Compact Muon Solenoid (CMS) experiment will be upgraded to cope with the new, challenging data-taking conditions expected at the High Luminosity phase of the Large Hadron Collider (HL-LHC). These upgrades will improve the present tracking and triggering capabilities. [...]
2022 - 10 p. - Published in : Int. J. Mod. Phys. A 37 (2022) 2240008
In : 9th International Conference on New Frontiers in Physics (ICNFP), Online, Greece, 4 - 12 Sep 2020, pp.2240008

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2022-05-05
15:29
Optics Measurement and Correction Strategies for HL-LHC / Buffat, Xavier (CERN) ; Carlier, Felix Simon (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria ; De Maria, Riccardo (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Fol, Elena (CERN) ; Fuster Martinez, Nuria ; Gamba, Davide (CERN) ; Garcia Morales, Hector ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) et al.
The baseline strategy for optics commissioning in the HL-LHC era is presented and reviewed in detail, along with recent developments and unsolved matters in the linear and nonlinear optics measurement and correction techniques..
CERN-ACC-2022-0004.
- 2022. - 102 p.

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2022-04-01
17:41
Experimental verification of thermal model for PCB mounted MOSFETs used on parallel H-bridge structures. / Garcia Retegui, Rogelio (ICYTE CONICET-UNMdP) ; Wassinger, Nicolas (ICYTE CONICET-UNMdP) ; Maestri, Sebastian (ICYTE CONICET-UNMdP) ; Antoszczuk, Pablo Daniel (ICYTE CONICET-UNMdP) ; Funes, Marcos (ICYTE CONICET-UNMdP) ; Pittet, Serge (CERN)
The upgrade of the Large Hadron Collider (LHC) towards the High Luminosity-LHC (HL-LHC) presents different challenges, among them, the upgrade of the power converters associated to the inner triplet magnets to reach the required nominal current of 18 kA. [...]
CERN-ACC-2021-014.
- 2021. - 7 p.
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2022-04-01
16:39
Conclusion of the Electrical Conformity Assessment Panel on the Installation of the MBH Magnet S2 in the LHC / Siemko, Andrzej (CERN) ; Devred, Arnaud (CERN) ; Rodriguez Mateos, Felix (CERN) ; Schmidt, Rudiger (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Verweij, Arjan (CERN) ; Wenninger, Jorg (CERN)
In this report we assess the feasibility for installation of the $Nb_{3}$Sn MBH S2 magnet in the LHC and conclude on possible performance limitations..
CERN-ACC-2021-013.
- 2021. - 26 p.

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2022-03-01
11:23
HL-LHC Experiment Data Quality Working Group Summary Report / Buffat, Xavier (CERN) ; Efthymiopoulos, Ilias (CERN) ; Medina Miranda, Luis David (CERN) ; Tomas Garcia, Rogelio (CERN) ; Wenninger, Jorg (CERN) ; Demers Konezny, Sarah Marie (Yale University (US)) ; Einsweiler, Kevin Frank (Lawrence Berkeley National Lab. (US)) ; Hawkings, Richard (CERN) ; Giacobbe, Benedetto (Universita e INFN, Bologna (IT)) ; Bohm, Christian (Stockholm University (SE)) et al.
This report summarizes the results of the HL-LHC Experimental Data Quality Working Group (EDQ WG). [...]
CERN-BE-2022-001.
- 2022.
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