CERN Accelerating science

SPS and CNGS

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2024-06-11
06:40
Transverse emittance growth due to rf noise in crab cavities: Theory, measurements, cure, and high luminosity LHC estimates / Baudrenghien, P (CERN) ; Mastoridis, T (Cal. Poly.)
The High-Luminosity LHC (HL-LHC) upgrade with planned operation from 2029 onward has a goal of achieving a tenfold increase in the integrated number of recorded collisions thanks to a doubling of the intensity per bunch (2.2×1011 protons) and a reduction of β* (the β value in the two high luminosity detectors, namely ATLAS and CMS) to 15 cm. Such an increase in recorded collisions would significantly expedite new discoveries and exploration. [...]
2024 - 20 p. - Published in : Phys. Rev. Accel. Beams 27 (2024) 051001 Fulltext: PDF;

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2024-06-07
06:37
Assessment of Training Performance, Degradation and Robustness of Paraffin-Wax Impregnated Nb3Sn Demonstrator Under High Magnetic Field / Araujo, D M (PSI, Villigen) ; Auchmann, B (PSI, Villigen ; CERN) ; Brem, A (PSI, Villigen) ; Daly, M (PSI, Villigen) ; Hug, C (PSI, Villigen) ; Michlmayr, T (PSI, Villigen) ; Amm, K (Brookhaven Natl. Lab.) ; Anerella, M (Brookhaven Natl. Lab.) ; Yahia, A Ben (Brookhaven Natl. Lab.) ; Cozzolino, J (Brookhaven Natl. Lab.) et al.
In the context of high-energy physics, the use of Nb3Sn superconducting magnets as a cost-effective and reliable technology depends on improvements in the following areas: long development and manufacturing cycles, conductor degradation after thermal cycling, long training, as well as a demonstration in accelerator magnets with a beam aperture of the full potential of modern Nb3Sn conductors. In short, performance, robustness, and cost are the three issues to be addressed. [...]
2024 - 8 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 7000208

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2024-06-05
09:40
Injector Availability Report 2023 / Felsberger, Lukas (CERN) ; Asko, Anti (CERN) ; Di Giovanni, Gian Piero (CERN) ; Heron, Jack (CERN) ; Mikulec, Bettina (CERN) ; Uythoven, Jan (CERN) ; Wollmann, Daniel (CERN)
This document summarises the injector availability during 2023 [...]
CERN-ACC-NOTE-2024-0012.
- 2024. - 35 p.
Full text

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2024-06-04
07:39
Deformation Analysis of LEP / Mayoud, Michel (CERN) ; Quesnel, Jean-Pierre (CERN) ; Fengxiang, Jin (Shandong U. Sci. Tech.)
LEP (Large Electron Positron Collider) is in an underground accelerator, located in a tunnel of 27 km circumference and from 40 to 160 m deep. It is the largest accelerator in the world. [...]
1999 - 11 p. - Published in : (1999) , pp. 152-162
In : 9th FIG International Symposium on Deformation Measurements, Olsztyn, Poland, 27-30 Sep 1999, pp.152-162

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2024-06-01
03:28
SIMULATION STUDIES OF LASER COOLING FOR THE GAMMA FACTORY PROOF-OF-PRINCIPLE EXPERIMENT AT THE CERN SPS / Kruyt, Peter Martin (Goethe University Frankfurt (DE)) ; Gamba, Davide (CERN) ; Franchetti, Giuliano (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
The Gamma Factory proof-of-principle (GF PoP) experi- ment at the Super Proton Synchrotron (SPS) at CERN aims at demonstrating laser cooling of high energy Li-like Pb79+ in a synchrotron. First, we present laser cooling simula- tions with realistic laser and beam parameters of the GF PoP experiment at the SPS. [...]
CERN-PBC-CONF-2024-001.- Geneva : CERN, 2024 Fulltext: PDF;

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2024-05-30
14:23
Loss of Landau damping in double harmonic RF systems / Intelisano, Leandro
Landau damping is a natural stabilization mechanism to mitigate coherent beam instabilities. In the absence of synchrotron radiation, it plays a crucial role in hadron accelerators, representing an effective way to maintain the beam stable. [...]
CERN-THESIS-2023-396.- 132 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-05-23
07:32
Status and prospects of the HL-LHC project / Zerlauth, Markus (CERN) ; Brüning, Oliver (CERN)
This contribution summarizes the status of preparations and series production of key technologies for the HL-LHC upgrade project. The upgrade will be deployed in the LHC tunnel at the end of the currently ongoing third operational run of the LHC, by creating new underground areas and upgrading the existing LHC equipment, aiming to increase the data set collected by the main LHC experiments by another order of magnitude and starting operation as of 2029..
2024 - 8 p. - Published in : PoS EPS-HEP2023 (2024) 615 Fulltext: PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023, pp.615

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2024-05-15
15:43
Non-invasive Beam Diagnostic Development for FCC using Cherenkov Diffraction Radiation in Dielectric Materials / Schloegelhofer, Andreas
Cherenkov diffraction radiation (ChDR) refers to the emission of electromagnetic radiation when a charged particle travels in the vicinity of dielectric matter, and the particle’s velocity exceeds the phase velocity of electromagnetic radiation in the dielectric [...]
CERN-THESIS-2024-054 - 204 p.


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2024-05-08
13:42
Inductive Adder for Driving Kicker Magnets Terminated in a Short-Circuit / Ruf, Johannes
In the CERN particle accelerator complex, fast pulsed magnet systems are used to transfer the particle beam between accelerator stages [...]
CERN-THESIS-2023-389 - Karlsruhe : Karlsruher Institut für Technologie (KIT), 2024-01-10.


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2024-05-02
07:42
Software architecture of FGC4, CERN’s next-generation power converter control platform / Cejp, Martin (CERN) ; Zielinski, Dariusz (CERN) ; Murillo-Garcia, Raul (CERN)
The Function Generator/Controller is CERN’s flagship controls platform for electrical power converters. Despite a proven track record, the current generation (FGC3) begins to show its age through performance limitations and component obsolescence. [...]
2023 - Published in : JACoW IPAC 2023 (2023) WEPM080 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPM080

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