CERN Accelerating science

LHC

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2024-03-18
11:47
Characterisation and modification of copper surfaces for cryogenic vacuum components of particle accelerators / Stranelova, Eva (University of Chemistry and Technology Prague (CZ))
The development of an electron cloud (e-cloud) in the Large Hadron Collider (LHC), caused by electron multipacting, is responsible for several problems in the accelerator operation, e.g. degradation of the beam quality and heat loads on the cryogenic system of superconducting magnets. [...]
CERN-THESIS-2023-360.- 80 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-03-18
11:22
An ultra-high vacuum system for secondary electron yield measurements and electron-conditioning of particle accelerators materials at cryogenic temperatures: commissioning and first experiments / Marinoni, Stefano (Politecnico di Milano (IT))
In the Large Hadron Collider (LHC), the avalanche multiplication of electrons inside the vacuum chamber drives the build-up of an electron cloud, which can impact the performance of the accelerator as it causes a substantial heat load to the cryogenic system. The evolution of the beam pipe chemical state and secondary electron emission properties under the electron cloud activity is known as surface conditioning. [...]
CERN-THESIS-2022-410.- 127 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-03-15
15:39
Local Interaction Region Coupling Correction for the LHC / Soubelet, Felix
In order to further expand our knowledge of the structure of matter and the workings of our universe, scientists are constantly seeking to collide particles at ever-increasing energies and with higher luminosity. So is the task of the Large Hadron Collider (LHC) at CERN, the highest energy particle accelerator and collider to date, and the goal of its future upgrade into the High-Luminosity Large Hadron Collider (HL-LHC). [...]
CERN-THESIS-2023-357.- 205 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-03-14
17:53
Assembly and Test Results of the RMM1a,b Magnet, a CERN Technology Demonstrator Towards Nb3Sn Ultimate Performance / Gautheron, Emma (CERN) ; Bordini, Bernardo (CERN) ; Campagna, Guillaume (CERN) ; Felice, Hélène (CERN) ; Fleiter, Jerome (CERN) ; Guinchard, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Mugnier, Sylvain (CERN) ; Perez, Juan Carlos (CERN) ; Petrone, Carlo (CERN) et al.
As part of the High Field Magnet technology development carried out at CERN, demonstrators are under construction to explore the full potential of Nb 3 Sn. The Racetrack Model Magnet (RMM) is one of them, building upon the successful Enhanced Racetrack Model Coil (eRMC) eRMC1a magnet which reached 16.5 T peak field or 16.3 T bore field at 1.9 K. [...]
2023 - 8 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 1-8

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2024-03-14
17:53
Experience on Series Production of the HL-LHC Superferric High Order Corrector Magnets / Statera, M (Milan U.) ; Prioli, M (Milan U.) ; Broggi, F (Milan U.) ; De Matteis, E (Milan U.) ; Imeri, L (Milan U.) ; Leone, A (Milan U.) ; Mariotto, S (Milan U. ; INFN, Milan) ; Paccalini, A (Milan U.) ; Pasini, A (Milan U.) ; Pedrini, D (Milan U.) et al.
INFN has developed at the LASA lab (Milano, Italy) the High Order (HO) corrector magnets for the High Luminosity-LHC (HL-LHC) project, which will equip the new interaction regions. All the HO correctors, from skew quadrupole to dodecapole, are based on a novel superferric design, never used so far in high energy colliders, which allows a relatively simple, modular, and easy way to construct a magnet. [...]
2023 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 1-7

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2024-03-01
08:36
The high luminosity Large Hadron Collider project: from project to reality at CERN / Cantalapiedra, G Aparicio (CERN) ; Oliveira, J (CERN) ; Corso, J P (CERN) ; Fessia, P (CERN) ; Maridor, S (CERN) ; Modena, M (CERN)
The High Luminosity Large Hadron Collider (HL-LHC) project is an upgrade of the LHC aiming to increase by a factor 10 the harvested integrated luminosity foreseen early 40s. During Long Shutdown 3, scheduled to begin at the end of 2025, nearly 1.2 km of accelerator components, including a range of services spread across surface and underground facilities, will be replaced with new equipment deploying innovative key technologies. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) WEPM124 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPM124

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2024-02-28
17:19
LHC Performance Workshop 2023 / Lamont, Mike (CERN) ; Jones, Rhodri (CERN)
The LHC Chamonix Workshop 2023 took place from 23 to 26 January 2023 at the Majestic conference centre in Chamonix. [...]
CERN-ACC-NOTE-2024-0005.
- 2024. - 53 p.

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2024-02-21
06:01
The Large Hadron Collider of CERN and the Roadmap Toward Higher Performance / Rossi, Lucio (CERN)
The Large Hadron Collider is exploring the new frontier of particle physics. It is the largest and most ambitious scientific instrument ever built and 100 years after the Rutherford experiment it continues that tradition of "smashing atoms" to unveil the secret of the infinitely small. [...]
2011 - 14 p. - Published in : Pontif. Acad. Sci. Scr. Varia: 119 (2011) , pp. 517-530 External link: Fulltext
In : Subnuclear Physics: Past, Present and Future, Vatican City, Vatican City State, 30 Oct - 2 Nov 2011, pp.517-530

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2024-02-21
06:01
The Origin of LEP and LHC / Aymar, Robert (DAPNIA, Saclay)
2011 - 12 p. - Published in : Pontif. Acad. Sci. Scr. Varia: 119 (2011) , pp. 97-108 Fulltext: PDF; External link: Fulltext
In : Subnuclear Physics: Past, Present and Future, Vatican City, Vatican City State, 30 Oct - 2 Nov 2011, pp.97-108

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2024-02-15
11:55
LHC MD 6945: Injection Power Transients / Karlsen-Baeck, Birk Emil (Sapienza Universita e INFN, Roma I (IT)) ; Argyropoulos, Theodoros (CERN) ; Butterworth, Andy (CERN) ; Calaga, Rama (CERN) ; Damerau, Heiko (CERN) ; Dlugosz, Dominika Agnieszka ; Karpov, Ivan (CERN) ; Timko, Helga (CERN) ; Zampetakis, Michail (CERN)
This note summarizes the procedure and results from the RF MD that was performed to study power transients and klystron saturation at injection. [...]
CERN-ACC-NOTE-2024-0002.
- 2024. - 12 p.
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High Luminosity Large Hadron Collider (HL-LHC) (1,140)
HiLumi LHC (264)