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CERN Document Server 2,047 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 0.34 δευτερόλεπτα. 
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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
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Phase Advance Interlocking Throughout the Whole LHC Cycle / Fuchsberger, Kajetan (CERN) ; Calia, Andrea (CERN) ; Galilée, Marc-Antoine (CERN) ; Hemelsoet, Georges-Henry (CERN) ; Hostettler, Michael (CERN) ; Jacquet, Delphine (CERN) ; Makai, Jozsef (CERN) ; Schaumann, Michaela (CERN)
Each beam of CERN's Large Hadron Collider (LHC) stores 360 MJ at design energy and design intensity. In the unlikely event of an asynchronous beam dump, not all particles would be extracted immediately. [...]
CERN-ACC-2017-136.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-TUPIK087 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK087
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Renovation of the Beam-Based Feedback Controller in the LHC / Grech, Leander (CERN) ; Alves, Diogo (CERN) ; Calia, Andrea (CERN) ; Hostettler, Michael (CERN) ; Jackson, Stephen (CERN) ; Valentino, Gianluca (U. Malta) ; Wenninger, Jorg (CERN)
This work presents an extensive overview of the design choices and implementation of the Beam-Based Feedback System (BBFS) used in operation until the LHC Run 2. The main limitations of the BBFS are listed and a new design called BFCLHC, which uses the CERN Front-End Software Architecture (FESA), framework is proposed. [...]
2022 - 6 p. - Published in : JACoW ICALEPCS2021 (2022) 671-676 Fulltext: PDF;
In : 18th International Conference on Accelerator and Large Experimental Physics Control Systems, Online, 18 - 22 Oct 2021, pp.671-676
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4.
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Online luminosity control and steering at the LHC / Hostettler, Michael (CERN) ; Alemany-Fernández, Reyes (CERN) ; Calia, Andrea (CERN) ; Follin, Fabio (CERN) ; Fuchsberger, Kajetan (CERN) ; Gabriel, Mathieu (CERN) ; Gorzawski, Arkadiusz (CERN) ; Hemelsoet, Georges-Henry (CERN) ; Hruska, Marek (CERN) ; Jacquet, Delphine (CERN) et al.
This contribution reviews the novel LHC luminosity control software stack. All luminosity-related manipulations and scans in the LHC interaction points are managed by the LHC luminosity server, which enforces concurrency correctness and transactionality. [...]
2018 - 5 p. - Published in : 10.18429/JACoW-ICALEPCS2017-TUSH201 Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.TUSH201
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Testing the Untestable: A Realistic Vision of Fearlessly Testing (Almost) Every Single Accelerator Component Without Beam and Continuous Deployment Thereof / Calia, Andrea (CERN) ; Fuchsberger, Kajetan (CERN) ; Hostettler, Michael (CERN)
Whenever a bug in some piece of software or hardware stops beam operation, loss of time is rarely negligible and the cost (either in lost luminosity or real financial one) might be significant. Optimization of the accelerator availability is a strong motivation to avoid such kind of issues. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-TUPG30 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.TUPG30
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(72)
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
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7.
(63)
Tensorics - A Java library for manipulating multi-dimensional data / Fuchsberger, Kajetan (CERN) ; Calia, Andrea (CERN) ; Garnier, Jean-Christophe (CERN) ; Gorzawski, Arkadiusz (CERN) ; Hostettler, Michael (CERN) ; Krol, Kamil (CERN)
Accelerator control software often has to handle multi-dimensional data of physical quantities when aggregating readings from multiple devices (e.g. the reading of an orbit in the LHC). [...]
2018 - 6 p. - Published in : 10.18429/JACoW-ICALEPCS2017-THPHA177 Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.THPHA177
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The LHC run 2022 / Jacquet, D (CERN) ; Argyropoulos, T (CERN) ; Bravin, E (CERN) ; Calia, A (CERN) ; Hostettler, M (CERN) ; Métral, E (CERN) ; Mirarchi, D (CERN) ; Nisbet, D (CERN) ; Persson, T (CERN) ; Redaelli, S (CERN) et al.
Following a 3-year long shutdown for upgrade and consolidation work, the LHC was re-commissioned in spring 2022, achieving a new record of 6.8 TeV per beam. This paper will describe the beam commissioning phase, the electron cloud conditioning, and the intensity ramp-up bringing the machine to a steady production state. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) MOPL020 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL020
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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
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Operational $\beta$* levelling at the LHC in 2022 and beyond / Hostettler, M (CERN) ; Calia, A (CERN) ; Fartoukh, S (CERN) ; Jacquet, D (CERN) ; Wenninger, J (CERN)
During the third run period of the CERN Large Hadron Collider (LHC), as well as for the future High-Luminosity LHC era, luminosity levelling by beta* is a key technique to control the pile-up in the high-luminosity experiments ATLAS and CMS while maintaining Landau damping through the head-on beam-beam interaction. This implies changing the machine optics in the interaction regions while keeping high-intensity beams in collision and the experimental detectors in their data taking configuration. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) MOPL045 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL045
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