CERN Accelerating science

HL-LHC Conference Papers

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2021-11-26
06:10
Precision luminosity measurement with the CMS detector at HL-LHC / Pásztor, Gabriella (Eotvos U., Dept. Atomic Phys.) /CMS Collaboration
The high-luminosity upgrade of the LHC (HL-LHC) is foreseen to reach an instantaneous luminosity a factor of five to seven times the nominal LHC design value. The resulting, unprecedented requirements for background monitoring and luminosity measurement create the need for new high-precision instrumentation at CMS, using radiation-hard detector technologies. [...]
SISSA, 2021 - 6 p. - Published in : PoS ICHEP2020 (2021) 864 Fulltext: PDF;
In : 40th International Conference on High Energy Physics (ICHEP), Prague, Czech Republic, 28 Jul - 6 Aug 2020, pp.864

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2021-11-26
06:10
ME0 project for the Triple-GEM upgrade of the CMS muon spectrometer: Design, preliminary performance and R&D; perspective / Fiorina, D (INFN, Pavia ; Pavia U.) /CMS Collaboration
In the framework of the HL-LHC project, the upgrade of the CMS Muon System envisages the installation of three new muon stations based on the GEM technology, named as GE1/1, GE2/1 and ME0. The CMS GEM Group has developed a novel construction design of GE1/1 triple-GEM detectors; in particular, a new self-stretching technique has been introduced to mechanically stretch the GEM foils without using spacer grids or glue inside the gas volume. [...]
2021 - 4 p. - Published in : Nuovo Cimento C 44 (2021) 45 Fulltext: PDF;
In : 106th Congresso Nazionale della Societa Italiana di Fisica, Online, 14 - 18 Sep 2020, pp.45

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2021-11-24
06:18
Precision Timing with the CMS MTD Barrel Timing Layer for HL-LHC / Tramontano, R (Rome U. ; INFN, Rome ; CERN) /CMS Collaboration
The Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider (LHC) is undergoing an extensive Phase-2 upgrade program to prepare for the challenging conditions of the High-Luminosity LHC (HL-LHC). A new timing detector in CMS will measure minimum ionizing particles (MIPs) with a time resolution of 30–40 ps. [...]
2021 - 4 p. - Published in : Nuovo Cimento C 44 (2021) 80 Fulltext: PDF;
In : 106th Congresso Nazionale della Societa Italiana di Fisica, Online, 14 - 18 Sep 2020, pp.80

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2021-11-24
06:18
3D pixel modules characterization with RD53A readout for ATLAS ITk Upgrade / Vannoli, L (INFN, Genoa) /ATLAS Collaboration
The High-Luminosity LHC (HL-LHC) with its large number of collisions per bunch crossing will present a very challenging environment to the particle detectors. To cope with these conditions, the current inner detector of the ATLAS experiment will be replaced with a new all-silicon Inner Tracker (ITk) during the Phase-II upgrade. [...]
2021 - 4 p. - Published in : Nuovo Cimento C 44 (2021) 82 Fulltext: PDF;
In : 106th Congresso Nazionale della Societa Italiana di Fisica, Online, 14 - 18 Sep 2020, pp.82

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2021-11-09
09:05
Radiation hard monolithic CMOS sensors with small electrodes for the HL-LHC and beyond / Solans Sánchez, Carlos  (CERN) ; Allport, Philip (Birmingham U.) ; Asensi Tortajada, Ignacio  (CERN ; Valencia U.) ; Bortoletto, Daniela (Oxford U.) ; Buttar, Craig (Glasgow U.) ; Cardella, Roberto (CERN ; Oslo U.) ; Dachs, Florian (CERN ; Vienna U.) ; Dao, Valerio (CERN) ; Denizli, Haluk (Abant Izzet Baysal U.) ; Dyndal, Mateusz (CERN) et al.
The upgrade of tracking detectors for experiments at the HL-LHC and future colliders requires the development of novel radiation hard silicon sensors. We target the replacement of hybrid pixel detectors with Depleted Monolithic Active Pixel Sensors (DMAPS) that are radiation hard monolithic CMOS sensors. [...]
SISSA, 2021 - 5 p. - Published in : PoS ICHEP2020 (2021) 871 Fulltext: PDF;
In : 40th International Conference on High Energy Physics (ICHEP), Prague, Czech Republic, 28 Jul - 6 Aug 2020, pp.871

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2021-10-12
06:02
Risk of Halo-Induced Magnet Quenches in the HL-LHC Beam Dump Insertion / Potoine, Jean-Baptiste (CERN ; Montpellier U.) ; Apollonio, Andrea (CERN) ; Belli, Eleonora (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; D'Andrea, Marco (CERN) ; García Alía, Ruben (CERN) ; Lechner, Anton (CERN) ; Lerner, Giuseppe (CERN) ; Morales Vigo, Sara (CERN) et al.
After the High Luminosity (HL-LHC) upgrade, the LHC will be exposed to a higher risk of magnet quenches during periods of short beam lifetime. Collimators in the extraction region (IR6) assure the protection of magnets against asynchronous beam dumps, but they also intercept a fraction of the beam halo leaking from the betatron cleaning insertion. [...]
2021 - 4 p. - Published in : 10.18429/JACoW-IPAC2021-MOPAB002 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.41

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2021-10-12
06:01
Radiation to Electronics Impact on CERN LHC Operation: Run 2 Overview and HL-LHC Outlook / Aguiar, Ygor (CERN) ; Apollonio, Andrea (CERN) ; Cerutti, Francesco (CERN) ; Danzeca, Salvatore (CERN) ; García Alía, Ruben (CERN) ; Lerner, Giuseppe (CERN) ; Prelipcean, Daniel (CERN) ; Sabaté-Gilarte, Marta (CERN)
After the mitigation measures implemented during Run 1 (2010-2012) and Long Shutdown 1 (LS1, 2013-2014), the number of equipment failures due to radiation effects on electronics (R2E) leading to LHC beam dumps and/or machine downtime has been sufficiently low as to yield a minor impact on the accelerator performance. During Run 2 (2015-2018) the R2E related failures per unit of integrated luminosity remained below the target value of 0.5 events/fb-1, with the sole exception of the 2015 run during which the machine commissioning took place. [...]
2021 - 4 p. - Published in : 10.18429/JACoW-IPAC2021-MOPAB013 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.80-83

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2021-10-05
14:49
Nb$_3$Sn RRP Strand and Rutherford Cable Development for a 15 T Dipole Demonstrator / Barzi, E. (Fermilab) ; Andreev, N. (Fermilab) ; Li, P. (Fermilab) ; Lombardo, V. (Fermilab) ; Turrioni, D. (Fermilab) ; Zlobin, A. V. (Fermilab)
Keystoned Rutherford cables made of 28 strands and with a stainless steel core were developed and manufactured using 1-mm Nb$_3$Sn composite wires produced by Oxford Superconducting Technology with 127 and 169 restacks using the Restacked-Rod-Process. The performance and properties of these cables were studied to evaluate possible candidates for 15-T accelerator magnets..
FERMILAB-PUB-16-039-TD.- 2016 - Published in : IEEE Trans. Appl. Supercond. 26 (2016) 4804305
In : 24th International Conference on Magnet Technology, Seoul, Korea, 18 - 23 Oct 2015, pp.4804305

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2021-10-05
07:50
An Experimental 11.5-T Nb$_3$Sn LHC type of dipole magnet / den Ouden, A (Twente U. Tech., Enschede) ; Wessel, S (Twente U. Tech., Enschede) ; Krooshoop, E (Twente U. Tech., Enschede) ; Dubbeldam, R (HOLEC, Hengelo) ; ten Kate, H H J (Twente U. Tech., Enschede)
As part of the magnet development program for the LHC an experimental 1 m long 11.5 T single aperture Nb$_3$Sn dipole magnet has been designed and is now under construction. The design is focused on full utilisation of the high current density in the powder tube Nb$_3$Sn [...]
1994 - 4 p. - Published in : IEEE Trans. Magn. 30 (1994) 2320-2323

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2021-10-05
07:50
Development and test of single-bore $Cos \vartheta$ Nb$_3$Sn dipole models with cold iron yoke / Andreev, N (Fermilab) ; Ambrosio, G (Fermilab) ; Barzi, E (Fermilab) ; Carcagno, R (Fermilab) ; Chichili, D R (Fermilab) ; DiMarco, J (Fermilab) ; Feher, S (Fermilab) ; Imbasciati, L (Fermilab) ; Kashikhin, V V (Fermilab) ; Lamm, M (Fermilab) et al.
Two short Nb$_3$Sn dipole models based on a single-bore cos-theta coil with a cold iron yoke were fabricated and tested at Fermilab. This paper summarizes the details of magnet design and fabrication procedure, and reports the test results including quench performance and quench heater studies, and the magnetic measurements..
FERMILAB-CONF-01-380.- 2002 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 12 (2002) 332-336 Fulltext: PDF;
In : 17th International Conference on Magnet Technology, CERN, Geneva, Switzerland, 24 - 28 Sep 2001, pp.332-336

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