CERN Accelerating science

LHC

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2024-10-31
12:12
The Universe in a Cake! A Dark Matter Cake Recipe & Explainer / Leney, Katharine (Southern Methodist University (US))
This handout includes a cake recipe and an explainer about the composition of the universe — covering visible matter, dark matter, and dark energy. [...]
ATLAS-OUTREACH-2024-026.
- 2024 - 3.
Language: English

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2024-10-31
11:24
Development and Reliability Testing of a new Low-Voltage Power Supply for the ATLAS Hadronic Tile-Calorimeter Phase-II Upgrade / Mckenzie, Ryan Peter (University of the Witwatersrand (ZA))
The Large Hadron Collider (LHC), located at the Conseil Européen pour la Recherche Nucléaire (CERN) also known as the European Laboratory of Particle Physics, is a two- ring-superconducting-hadron accelerator and collider located on the Franco-Swiss bor- der. The LHC was successfully commissioned in 2010 for proton–proton collisions and is expected to deliver 500 fb−1 before Long Shutdown three (LS3) that is schedule to commence in 2026. [...]
CERN-THESIS-2024-217.- Fulltext: PDF; External link: Approve this document (restricted)

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2024-10-31
06:04
High voltage consolidation of the temperature measurement channels of the LHC superconducting current leads / Trikoupis, N (CERN) ; Casas-Cubillos, J (CERN) ; Bustamante, E (CERN)
Recurrent dielectric breakdowns on the cryogenics instrumentation during the CERN LHC Electrical Quality Assurance (ELQA) campaigns led to an investigation of their root causes. During the CERN Long Shutdown 2 (LS2), several weaknesses were identified like floating wires or cable screens, cabling non-conformities, connector assembly issues, and weakness of the electronic conditioning cards. [...]
2023 - 8 p. - Published in : JINST 18 (2023) C02010
In : Topical Workshop on Electronics for Particle Physics 2022 (TWEPP 2022), Bergen, Norway, 19 - 23 Sep 2022, pp.C02010

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2024-10-30
15:31
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

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2024-10-18
06:28
Reliability run and data analysis of the accelerated aging of present and future electrolytic capacitors installed in the protection systems of superconducting magnets of the Large Hadron Collider at CERN / Guasch-Martínez, J (CERN) ; Carrillo, D (CERN) ; de Nicolás, E (CERN) ; Bjorkhaug, E (CERN) ; Nowak, E (CERN) ; Pojer, M (CERN) ; Rodríguez-Mateos, F (CERN)
This study evaluates the lifetime and aging process of the aluminium electrolytic capacitors to be used in the new protection systems of the High Luminosity LHC superconducting magnets. The accelerated testing and analysis of several groups of capacitors aged for more than one year provided insights into their expected lifespan and aging process. [...]
2024 - 7 p. - Published in : JINST
Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics 2023 (TWEPP 2023), Geremeas, Sardinia, Italy, 1 - 6 Oct 2023, pp.C03003

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2024-10-17
10:48
Improved CERN LHC layout and aperture models / Lampaki, Syrmatenia
Aperture models are of fundamental importance to design machine optics configurations and predict machine performance [...]
CERN-THESIS-2024-195 - Thessaloniki , Greece : Aristotle University of Thessaloniki, 2024-06-21 - 88.


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2024-10-16
09:18
Simulations of incoherent effects driven by electron clouds forming in the inner triplets of the Large Hadron Collider / Paraschou, Konstantinos (CERN) ; Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN)
During Run 2 and Run 3 of the Large Hadron Collider (LHC), slow losses from electron cloud (e-cloud) effects have been systematically observed during the full duration of fills with closely-spaced proton bunches. In particular, these effects had been found to depend strongly on the crossing angle of the two beams and the value of the betatron functions in the interaction points. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) WEPR57 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR57

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2024-10-15
13:51
Report from LHC MD 6863: Amplitude Detuning Corrections from Feed-Down / Dilly, Joschua Werner (CERN) ; Le Garrec, Mael (Goethe University Frankfurt (DE)) ; Maclean, Ewen Hamish (CERN) ; Van Riesen-Haupt, Leon (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Tomas Garcia, Rogelio (CERN)
Report of the MD6863 performed on the 24th and 25th of June 2022 to establish new corrections for the dodecapole correctors in LHC IP1 and IP5 to mitigate feed-down effects of high-order errors to amplitude detuning. [...]
CERN-ACC-NOTE-2023-0028.
- 2023 - 13.
Full text

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2024-10-09
15:10
Benchmarking power deposition from fast losses of heavy-ion beams at the onset of LHC Run 3 / Rodin, Volodymyr (CERN) ; Lechner, Anton (CERN) ; Salvachua, Belen (CERN) ; Mirarchi, Daniele (CERN) ; Esposito, Luigi Salvatore (CERN) ; D'Andrea, Marco (CERN) ; Schoofs, Philippe (CERN) ; Bruce, Roderik (CERN) ; Cai, Rongrong (CERN) ; Morales Vigo, Sara (CERN) et al.
In 2023, the LHC started its Run 3 operation with $^{208}\text{PB}^{82+}$ beams at 6.8 ZTeV, with a substantially higher number of bunches compared to past runs. Several new hardware systems were used operationally for the first time with high-intensity beams, including bent crystal collimators in the betatron cleaning insertion. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) TUPS39 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPS39

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2024-10-09
15:10
LHC abort gap monitor electronics upgrade / Pacner, Petr (CERN) ; Belohrad, David (CERN) ; Martin Nieto, Miguel (CERN) ; Mazzoni, Stefano (CERN) ; Bart Pedersen, Stephane (CERN)
The LHC Abort Gap Monitor (AGM) is part of the LHC machine protection system (MPS) and is designed to measure the particle population in a 3µs wide region known as the "abort gap." This region needs to be kept empty to ensure safe beam dumps. The AGM captures the synchrotron light generated in the visible part of the spectra and converts it into an electric signal. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) TUPR78 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPR78

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High Luminosity Large Hadron Collider (HL-LHC) (1,214)
FP7 HiLumi LHC Design Study (264)