CERN Accelerating science

R&D and Studies

Phase Evolution During Heat Treatment of Nb$_3$Sn Wires Under Development for the FCC Study / Hopkins, Simon C (CERN) ; Baskys, Algirdas (CERN) ; Ballarino, Amalia (CERN) ; Lachmann, Jonas (TU Bergakademie Freiberg) ; Leineweber, Andreas (TU Bergakademie Freiberg)
In recent years, the phase formation sequence during heat treatment of Nb$_3$Sn wires, and the influence of the microstructure and compositional homogeneity of Nb$_3$Sn on in-field critical current ($I_c$), have received increasing attention. For RRP wires, the importance of understanding and managing the formation of the ternary phase nausite has been demonstrated. [...]
2021 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 1-6 Fulltext: PDF;

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Book cover Focus Point on A Future Higgs & Electroweak Factory (FCC): Challenges towards Discovery : Part II: Physics Opportunities and Challenges
Springer, 2021.

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Accelerating cavity and higher order mode coupler design for the Future Circular Collider / Gorgi Zadeh, Shahnam
CERN-THESIS-2020-358 - : Universität Rostock , 2021-05-11.

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High-Temperature Superconductor Coatings for Beam Impedance Reduction in Particle Colliders: Nonlinear Effects / Calatroni, Sergio (CERN) ; Vaglio, Ruggero (CNR-SPIN, Naples ; INFN, Naples)
Coating of surfaces facing particle beams with hightemperature superconductors (HTS) for reducing the beam coupling impedance is being considered for the next generation of hadron colliders, such as the FCC-hh at CERN, where HTS would be exposed to the high-frequency wakefields generated by the particle bunches and to the strong field of the steering magnets. In this frame, we present a simple model for the calculation of the microwave response of HTS exposed to a strong external magnetic field, which takes into account the nonlinearity of the pinning potential of the vortex lattice. [...]
2021 - 8 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 3500208 Fulltext: PDF;

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Self-Modulation Development of a Proton Bunch in Plasma / Bachmann, Anna-Maria
CERN-THESIS-2021-094 - : mediaTUM, 2021-07-16.

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Considerations Towards a High Field Accelerator Magnets Programme Part I: Motivation, Goals, Challenges and Program Drivers / Bottura, Luca (CERN)
The Large Hadron Collider (LHC) at CERN can be regarded as the ultimate collider built with Nb-Ti magnets. [...]
- 2021. - 21 p.

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First demonstration of the use of crab cavities on hadron beams / Calaga, R (CERN) ; Alekou, A (Manchester U.) ; Antoniou, F (CERN) ; Appleby, R B (Manchester U.) ; Arnaudon, L (CERN) ; Artoos, K (CERN) ; Arduini, G (CERN) ; Baglin, V (CERN) ; Barriere, S (CERN) ; Bartosik, H (CERN) et al.
Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
2021 - 6 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 062001 Fulltext: PDF;

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Optimized injector schemes for FCC-ee positron production / Bai, B (Beijing, Inst. High Energy Phys. ; IJCLab, Orsay ; Beijing, GUCAS) ; Faus-Golfe, A (IJCLab, Orsay) ; Han, Y (IJCLab, Orsay) ; Chaikovska, I (IJCLab, Orsay) ; Zhou, Z (Beijing, Inst. High Energy Phys.) ; Chi, Y (Beijing, Inst. High Energy Phys.) ; Oide, K (CERN ; KEK, Tsukuba) ; Zimmermann, F (CERN)
Injectors and in particular the positron production systems are a crucial element in linear and circular colliders. The proposed FCC-ee injector linac accelerates both electrons and positrons up to 6 GeV in order to be injected into the Pre-Booster Ring (PBR) with a high intensity of 3.5 nC per bunch for the Z running mode. [...]
2021 - 14 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1009 (2021) 165463

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Muon Collider. A Path to the Future? / Schulte, Daniel (CERN) ; Delahaye, Jean-Pierre (CERN) ; Diemoz, Marcella (INFN, Rome) ; Long, Ken (Imperial Coll., London) ; Mansoulié, Bruno (IRFU, Saclay) ; Patrone, Nadia (INFN, Turin) ; Rivkin, Lenny (Ecole Polytechnique, Lausanne ; PSI, Villigen) ; Skrinsky, Alexander M (Novosibirsk, IYF) ; Wulzer, Andrea (CERN ; EPFL, Lausanne, LPTP ; Padua U.)
A high-energy muon collider is receiving renewed attention as a possible frontier-exploration machine. Daniel Schulte, Nadia Pastrone and Ken Long describe the possible paths ahead..
SISSA, 2019 - 7 p. - Published in : PoS EPS-HEP2019 (2020) 004 Fulltext: PDF; External link: CERN Courier Article
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019, pp.004

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Preliminary Design of the NB$_3$Sn $cos$ $\theta$ Short Model for the FCC / Pampaloni, Alessandra (INFN, Genoa) ; Bellomo, Giovanni (Milan U. ; LASA, Segrate) ; Burioli, Sergio (INFN, Genoa ; U. Genoa) ; De Matteis, Ernesto (LASA, Segrate) ; Fabbricatore, Pasquale (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Lackner, Friedrich (CERN) ; Levi, Filippo (INFN, Genoa ; U. Genoa) ; Mariotto, Samuele (Milan U. ; LASA, Segrate) ; Musenich, Riccardo (INFN, Genoa) et al.
The next generation particle accelerators will need to increase by an order of magnitude the center-of-mass energy: a viable solution is a 100 TeV circular collider, temporarily called Future Circular Collider (FCC). To achieve this goal, a new generation of double aperture superconducting magnets, capable of generating a high quality, stable 16 T magnetic field in a 50 mm bore is being developed. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4900905

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PBC - Physics Beyond Colliders (47)
Future Circular Collider Documents (186)
Muon Collider study (2)