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CERN Document Server Znaleziono 22 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.97 sekund. 
1.
LHC Availability Report 2023 / Felsberger, Lukas (CERN) ; Asko, Anti (CERN) ; Heron, Jack (CERN) ; Hostettler, Michi (CERN) ; Mikulec, Bettina (CERN) ; Uythoven, Jan (CERN) ; Wollmann, Daniel (CERN)
This document summarises the LHC availability during 2023 and compares it to previous years. [...]
CERN-ACC-NOTE-2024-0019.
- 2024 - 22.
Full text
2.
Improvement of the LHC orbit feedback testing framework / Calia, Andrea (CERN) ; Alves, Diogo (CERN) ; Wenninger, Jorg (CERN) ; Hostettler, Michi (CERN) ; Jackson, Stephen (CERN)
During the Long Shutdown 2 (LS2 2019-2021) of the LHC, the orbit feedback correction software (OFB) of the LHC was redesigned to satisfy new requirements for LHC Run 3 (2022-2025) and to clean up legacy functionalities. The OFB is an essential component of LHC high intensity operation since the orbit must be stabilized to a fraction of the beam size during the entire LHC machine cycle. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) THPG30 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPG30
3.
Operation of the LHC during the 2023 proton run / Calia, Andrea (CERN) ; Salvant, Benoit (CERN) ; Mirarchi, Daniele (CERN) ; Nisbet, David (CERN) ; Jacquet, Delphine (CERN) ; Métral, Elias (CERN) ; Bravin, Enrico (CERN) ; Trad, Georges (CERN) ; Wenninger, Jorg (CERN) ; Solfaroli, Matteo (CERN) et al.
In 2023 the LHC restarted after the yearly winter shutdown with a new machine configuration optimized for intensities of up to 1.8e+11 protons per bunch. In the first two months of the 2023 run the bunch intensities were pushed up to 1.6e+11 protons per bunch until a severe vacuum degradation, caused by a damaged RF bridge, occurred close to the ATLAS experiment. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) MOPC17 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC17
4.
Simulations and experiments for dynamic aperture studies in the LHC ion operation / Kostoglou, Sofia (CERN) ; Sterbini, Guido (CERN) ; Bartosik, Hannes (CERN) ; Efthymiopoulos, Ilias (CERN) ; Hostettler, Michi (CERN) ; Bruce, Roderik (CERN)
Dynamic Aperture (DA) studies, based on single-particle tracking simulations including important non-linear fields such as beam-beam effects, have played a crucial role in guiding the operation of the Large Hadron Collider (LHC) in proton-proton collisions. The correspondence between DA computed through simulations and the actual beam lifetime during operation has been established for proton beams through dedicated experiments at the LHC. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) MOPS06 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPS06
5.
Machine Configuration for the 2023 Proton Run (MD7003) / Fartoukh, Stephane (CERN) ; Dilly, Joschua Werner (CERN) ; Hostettler, Michi (CERN) ; Iadarola, Giovanni (CERN) ; Jacquet, Delphine (CERN) ; Kostoglou, Sofia (CERN) ; Mirarchi, Daniele (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Sterbini, Guido (CERN) et al.
This note contains a condensed summary of the various beam tests which took place in 2022 in order to validate the machine configuration planned to be deployed for the 2023 proton run of the LHC, including in particular a combined ramp and anti-telescopic squeeze, the rotation of the external crossing angle in LHCb, and beam operation with up to 1.8 × 1011 p/b..
CERN-ACC-NOTE-2023-0005.
- 2023.
Full text
6.
Magnetization in superconducting corrector magnets and impact on luminosity-calibration scans in the Large Hadron Collider / Chmielinska, Agnieszka (CERN) ; Fiscarelli, Lucio (CERN) ; Todesco, Ezio (CERN) ; Hostettler, Michi (CERN) ; Russenschuck, Stephan (CERN) ; Kozanecki, Witold (Université Paris-Saclay (FR))
Superconducting accelerator magnets have a nonlinear dependence of field on current due to the magnetization associated to the iron or to persistent currents in the superconducting filaments. This also gives rise to hysteresis phenomena that create a dependence of the field on the powering history. [...]
arXiv:2304.06559; CERN-TE-2023-001.- Geneva : CERN, 2023-09-10 - 25 p. - Published in : Eur. Phys. J. Plus: 138 (2023) , no. 9, pp. 796
- Published in : Eur. Phys. J. Plus: 138 (2023) , no. 10, pp. 886 Fulltext: 2304.06559 - PDF; document - PDF; CERN-TE-2023-001 - PDF;
7.
Start collisions at 1m β∗ (MD 3349) / Calia, Andrea (CERN) ; Jacquet, Delphine (CERN) ; Wenninger, Jorg (CERN) ; Fuchsberger, Kajetan ; Hostettler, Michi (CERN)
This document summarises the LHC Machine Development session on colliding at β∗ = 1 m and squeezing with colliding beams to β∗ = 25 cm in IP 1 and 5 using the capabilities of the LumiServer. [...]
CERN-ACC-NOTE-2022-0006.
- 2021. - 6 p.
Full text
8.
MD2202: compensating long-range beam-beam effectin the LHC using DC wires / Sterbini, Guido (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Arduini, Gianluigi (CERN) ; Bartosik, Hannes (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Cattenoz, Gregory (CERN) ; Effinger, Ewald (CERN) ; Fartoukh, Stephane (CERN) et al.
his note summarizes the program of the LHC Machine Development to assess the potential and limits of the long-range beam-beam compensators held in 2017 (MD2202) [...]
CERN-ACC-NOTE-2019-0052.
- 2019. - 52 p.
Full text
9.
A VdM Sequence File Web Application / Hickman, Thomas Kendall ; Marqversen, Frederik Kofoed ; Calia, Andrea (CERN) ; Hostettler, Michi (CERN)
To perform Van der Meer scans at the LHC, the experimental collaborations have to supply a text file containing a command sequence specifying the beam positions required. [...]
CERN-ACC-NOTE-2019-0038.
- 2019.
Full text
10.
An upgraded luminosity leveling procedure for the ALICE Experiment / de Cataldo, Giacinto (INFN, Bari ; CERN) ; Valentino, Gianluca (CERN ; U. Malta) ; Franco, Antonio (INFN, Bari ; CERN) ; Alemany, Reyes (CERN) ; Follin, Fabio (CERN) ; Hostettler, Michi (CERN ; U. Bern (main)) ; Wenninger, Jorg (CERN)
The Large Hadron Collider (LHC) Interface project (LHC_IF) ensures that the A Large Ion Collider Experiment (ALICE) can operate congruently and safely with the LHC in different machine configurations and beam modes. Measurements in proton–proton (pp) collisions are vital for ALICE and serve as a reference to calibrate the Pb ion–Pb ion (Pb–Pb) measurements. [...]
2019 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 66 (2019) 763-770

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