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LHC

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2022-06-10
06:44
Physical Design of the Radiation Shielding for the CMS Experiment at LHC / Azhgirey, Igor L (Serpukhov, IHEP) ; Bozzato, Davide (CERN) ; Dabrowski, Anne E (CERN) ; Kurochkin, Igor A (Serpukhov, IHEP) ; Mallows, Sophie (KIT, Karlsruhe, ETP) ; Riabchikova, Anastasiia D (Serpukhov, IHEP)
The design of the radiation shielding for the CMS experiment at the LHC requires a simulation of the radiation environment using a model of the CMS experimental setup, accelerator components and the experimental hall infrastructure. The radiation simulations are used to optimise the design of the CMS detectors components and also the interface of the CMS detector with LHC accelerator. [...]
Geneva : JACoW, 2021 - 3 p. - Published in : JACoW IPAC 2021 (2021) 2246-2248 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2246-2248

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2022-06-04
06:06
Phase advance constraint in $K$ modulation for precise $\beta$-function determination / Garcia-Morales, H (CERN) ; Hofer, M (CERN) ; Maclean, E H (CERN) ; van Riesen-Haupt, L (CERN) ; Tomás, R (CERN)
A precise determination of the β function at different locations of an accelerator is essential to allow accurate optics correction and to ensure high machine performance. The β function can only be measured directly at locations where beam position monitors are installed. [...]
2022 - 11 p. - Published in : Phys. Rev. Accel. Beams 25 (2022) 041002 Fulltext: PDF;

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2022-06-02
06:29
Quench Behavior of Prototype Nb-Ti HL-LHC Dipole Canted Cos-Theta Orbit Corrector Magnets / Wozniak, Mariusz (CERN) ; Ravaioli, Emmanuele (CERN) ; Mangiarotti, Franco (CERN) ; Mentink, Matthias (CERN) ; Kirby, Glyn (CERN) ; Verweij, Arjan (CERN) ; Xu, Qingjin (CAS, Beijing) ; Wu, Wei (CAS, Beijing)
The HL-LHC project is an upgrade of the LHC that requires double aperture dipole correctors. In 2015, CERN selected Canted Cos-Theta (CCT) magnet, and the development of the MCBRD magnets followed. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 1-5 Fulltext: PDF;

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2022-06-02
06:29
Mechanical and thermal design of the target neutral beam absorber for the High-Luminosity LHC upgrade / Santos Díaz, P (Natl. U. Sci. Tech., Moscow) ; Sanchez Galan, F (CERN) ; De Maria, R (CERN) ; Kepes, E (Unlisted, CZ) ; Steinberg, P (Brookhaven Natl. Lab.) ; Longo, R (Illinois U., Urbana) ; Mazzoni, S (CERN) ; Cerutti, F (CERN) ; Sabate Gilarte, M (Seville U.) ; Infantino, A (CERN) et al.
The High-Luminosity target neutral beam absorber (TAXN) is the radiation absorber of the neutral particle debris generated at the beam collisions carried out in the ATLAS and CMS detectors at the Large Hadron Collider (LHC). The new absorber will protect the superconducting magnets from this radiation to prevent their quenching at a design luminosity of 7.5×1034  cm−2 s−1. [...]
2022 - 17 p. - Published in : Phys. Rev. Accel. Beams 25 (2022) 053001 Fulltext: PDF;

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2022-06-02
06:29
Luminosity and physics considerations on HL-LHC–and HE-LHC–based $\mu$p colliders / Kaya, Umit (Unlisted, TR) ; Ketenoglu, Bora (Ankara U.) ; Sultansoy, Saleh (TOBB ETU, Ankara) ; Zimmermann, Frank (CERN)
Construction of the future muon collider tangential to the Large Hadron Collider will give opportunity to realize μp collisions at multi-TeV center-of-mass energies. Using the nominal parameters of high-luminosity and high-energy upgrades of the LHC, as well as the design parameters of muon colliders, it is shown that L $_{μp}$ of the order of 10$^{33}$ cm$^{−2}$s$^{−1}$ is achievable for different options with from 4.58 TeV to 12.7 TeV. [...]
2022 - 5 p. - Published in : EPL 138 (2022) 24002

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2022-05-17
20:50
Optimization of the High Order Correctors for HL-LHC Toward the Series Production / Statera, Marco (INFN, Milan) ; Alessandria, Franco (INFN, Milan ; Milan U.) ; Bellomo, Giovanni (INFN, Milan ; Milan U.) ; Broggi, Francesco (INFN, Milan) ; Imeri, Luca (INFN, Milan) ; Leone, Augusto (INFN, Milan) ; Mariotto, Samuele (INFN, Milan ; Milan U.) ; Paccalini, Antonio (INFN, Milan) ; Pasini, Alessandro (INFN, Milan) ; Pedrini, Danilo (INFN, Milan) et al.
INFN is developing at the LASA lab (Milano, Italy) the High Order (HO) corrector magnets for the High Luminosity-LHC (HL-LHC) project, which will equip the interaction regions. Five prototypes, from skew quadrupole to dodecapole, have been designed and tested at LASA. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 1-5

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2022-05-06
06:25
Identification of Critical Components in the Complex Technical Infrastructure of the Large Hadron Collider Using Relief Feature Ranking and Support Vector Machines / Shokry, Ahmed (Ec. Polytech., Palaiseau (main)) ; Baraldi, Piero (Milan, Polytech.) ; Castellano, Andrea (Milan, Polytech.) ; Serio, Luigi (CERN) ; Zio, Enrico (Milan, Polytech. ; U. PSL)
This work proposes a data-driven methodology for identifying critical components in Complex Technical Infrastructures (CTIs), for which the functional logic and/or the system structure functions are not known due the CTI’s complexity and evolving nature. The methodology uses large amounts of CTI monitoring data acquired over long periods of time and under different operating conditions. [...]
2021 - 19 p. - Published in : Energies 14 (2021) 6000

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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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2022-05-04
16:04
Methods to optimize rare-event Monte Carlo reliability simulations for Large Hadron Collider Protection Systems / Blaszkiewicz, Milosz Robert
Machine Protection Systems of the Large Hadron Collider (LHC) are safety-critical systems that adhere to stringent reliability and availability requirements [...]
CERN-THESIS-2022-037 - 111 p.


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2022-04-19
14:45
Magnetic measurements of MCBC and MCBY orbit correctors under special cycling conditions / Chmielinska, Agnieszka (CERN) ; Fiscarelli, Lucio (CERN) ; Todesco, Ezio (CERN) ; Kozanecki, Witold (Université Paris-Saclay (FR))
In the LHC, in addition to normal beam operation, the MCBC and MCBY orbit-corrector magnets are used for deflecting the beam during the van der Meer (vdM) scans used for calibrating the absolute luminosity scale. [...]
CERN-ACC-NOTE-2022-0013. - 2022. - 28 p.
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High Luminosity Large Hadron Collider (HL-LHC) (1,010)
HiLumi LHC (264)