CERN Accelerating science


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Distribution Feedbox for the Superconducting Link (SCLink) and Magnets of HL-LHC / Bailey, W (Southampton U.) ; Pelegrin, J (Southampton U.) ; Falorio, I (Southampton U. ; CERN) ; Leclercq, Y (CERN) ; Betemps, R (CERN) ; Parma, V (CERN) ; Ballarino, A (CERN) ; Yang, Y (Southampton U.)
The High Luminosity LHC (HL-LHC) project aims at upgrading the LHC collider to increase its luminosity by about a factor of five. The electrical connection between the magnets in the LHC tunnel and the power converters in a new transverse tunnel will be supplied by a superconducting line (SCLink), consisting of ten MgB$_2$ cables housed into a 140 metre long flexible cryostat. [...]
IOP, 2020 - 9 p. - Published in : J. Phys. : Conf. Ser. 1559 (2020) 012076 Fulltext: PDF;
In : 14th European Conference on Applied Superconductivity, Glasgow, United Kingdom, 1 - 5 Sep 2019, pp.012076

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Design, Procurement, Installation and Commissioning of the Cryogenic Infrastructure for a New Superconducting RF Test Facility with Beam at CERN / Delprat, L (CERN) ; Brodzinski, K (CERN) ; Claudet, S (CERN) ; Derking, H (CERN)
The High-Luminosity LHC project (HL–LHC), aiming at peak luminosity above 5.0 × 10$^{34}$ cm$^{-2}$ s$^{-1}$, considers replacing the matching sections on both sides of the ATLAS and CMS experiments. To complement new focusing quadrupoles, this upgrade considers using the so-called superconducting crab cavities, never operated before with protons and therefore requiring qualification with beam. [...]
IOP, 2020 - 8 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 755 (2020) 012145 External link: Published Fulltext
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Hartford, Connecticut, 21 - 25 Jul 2019, pp.012145

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Thermal engineering of optical mirrors for use at cryogenic temperature inside a LHC magnet cryostat / Micolon, F (CERN) ; Dijoud, T (CERN) ; Durand, H Mainaud (CERN) ; Parma, V (CERN) ; Rude, V (CERN) ; Sosin, M (CERN)
In the frame of the HL-LHC project, innovative technical solutions are sought to measure accurately the position of the magnet helium vessel inside the cryostat. To this end, a system based on laser-interferometry is being designed to monitor the displacement of the vessel through dedicated openings in the new HL-LHC magnet cryostats. [...]
IOP, 2020 - 8 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 755 (2020) 012129 External link: Published fulltext
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Hartford, Connecticut, 21 - 25 Jul 2019, pp.012129

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Process control system evolution for the LHC Cold Compressors at CERN / Bradu, B (CERN) ; Delprat, L (CERN) ; Duret, E (CERN) ; Ferlin, G (CERN) ; Ivens, B (CERN) ; Lefebvre, V (CERN) ; Pezzetti, M (CERN)
The Large Hadron Collider (LHC) operates using superfluid helium provided by eight large refrigeration units (2.4 kW @ 1.8 K each). These units supplied by specialized cryogenic industrial suppliers are composed of serial hydrodynamic cold compressors based on an axial-centrifugal impeller coupled with volumetric warm screw compressors. [...]
IOP, 2020 - 8 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 755 (2020) 012086
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Hartford, Connecticut, 21 - 25 Jul 2019, pp.012086

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Thermal Neutron-Induced SEUs in the LHC Accelerator Environment / Cecchetto, Matteo (CERN) ; García Alía, Rubén (CERN) ; Wrobel, Frédéric (IES, Montpellier) ; Tali, Maris (CERN) ; Stein, Oliver (CERN) ; Lerner, Giuseppe (CERN) ; Bilko, Kacper (CERN) ; Esposito, Luigi (CERN) ; Bahamonde Castro, Cristina (CERN) ; Kadi, Yacine (CERN) et al.
In addition to high-energy hadrons, which include neutrons, protons, and pions above 20 MeV, thermal neutrons (ThNs) are a major concern in terms of soft error rate (SER) for electronics operating in the large hadron collider (LHC) accelerator at the European Organization for Nuclear Research (CERN). Most of the electronic devices still contain Boron-10 inside their structure, which makes them sensitive to ThNs. [...]
2020 - 9 p. - Published in : IEEE Trans. Nucl. Sci. 67 (2020) 1412-1420 Fulltext from publisher: PDF;

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Beam transfer function measurements used to probe the transverse Landau damping at the LHC / Tambasco, C (Ecole Polytechnique, Lausanne) ; Pieloni, T (Ecole Polytechnique, Lausanne) ; Barranco, J (Ecole Polytechnique, Lausanne) ; Buffat, X (CERN) ; Levens, T (CERN) ; Métral, E (CERN) ; Salvachua, B (CERN)
The Landau damping mechanism stabilizes the impedance driven head-tail modes in hadron synchrotrons. Because of the frequent coherent beam instabilities observed in the Large Hadron Collider in 2012, the Landau damping of the beams was doubted. [...]
2020 - 10 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 071002 Fulltext from publisher: PDF;

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FCC-hh Experimental Insertion Region Design / Abelleira, JoséL. (JAI, UK) ; Appleby, Robert B. (Manchester U.) ; Arsenyev, Sergey (CERN) ; Barranco, Javier (Ecole Polytechnique, Lausanne) ; Benedikt, Michael (CERN) ; Besana, Maria Ilaria (CERN) ; García, Oscar Blanco (Frascati) ; Boscolo, Manuela (Frascati) ; Boutin, David (IRFU, Saclay) ; Buffat, Xavier (CERN) et al.
The Future Circular Collider study is exploring possible designs of circular colliders for the post-LHC era, as recommended by the European Strategy Group for High Energy Physics. [...]
- 74 p.

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Secondary CLIQ, a robust, redundant, and cost-effective means of protecting high-field accelerator magnets / Mentink, M (CERN) ; Ravaioli, E (CERN)
Secondary CLIQ is a quench protection method for protecting high-field accelerator magnets that involves charged capacitors into secondary normal-conducting coils that are magnetically coupled to the superconducting coils. The resulting coupling losses quickly brings the magnet to normal state and safely discharges it. [...]
2020 - 16 p. - Published in : Supercond. Sci. Technol. 33 (2020) 085005 Fulltext: PDF;

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The UA9 setup for the double-crystal experiment in CERN-SPS / Scandale, W (CERN ; Imperial Coll., London) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Redaelli, S (CERN) ; Rossi, R (CERN) ; Burmistrov, L (IJCLab, Orsay) et al.
Experiments to measure the electric and the magnetic moments of short-lived baryons using an internal target and two bent crystals in the vicinity of one of the existing LHC detectors were recently proposed, in the frame of the Physics Beyond Colliders Working Group at CERN. Investigating fixed-target physics in the LHC with in-vacuum solid targets is an unprecedented challenge. [...]
2020 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 975 (2020) 164175

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TT20 Transport and Splitting of Beams Extracted Using Crystal Shadowing in LSS2 of the SPS / Arrutia Sota, Pablo Andreas (University of London (GB)) ; Dutheil, Yann (CERN) ; Fraser, Matthew Alexander (CERN) ; Velotti, Francesco Maria (CERN)
The CERN Super Proton Synchrotron (SPS) is employed to supply slow extracted beams to fixed target experiments located in CERN’s North Area [...]
- 2020. - 17 p.
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