CERN Accelerating science

R&D and Studies

High-Temperature Superconductor Application to Undulators for Compact Free-Electron Lasers / Richter, Sebastian
Short-period high-field undulators are essential components for the production of brilliant coherent light up to X-rays in compact light sources, e.g [...]
CERN-THESIS-2023-053 - Karlsruhe : Karlsruhe Institute of Technology (KIT). - 161 p.

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Mechanical Design of FalconD, a Nb$_3$Sn Cos$\theta$ Short Model Dipole for the FCC / Pampaloni, A (INFN, Genoa) ; Bellomo, G (Milan U. ; INFN, Milan) ; Burioli, S (INFN, Genoa ; Genoa U.) ; Caiffi, B (INFN, Genoa) ; De Matteis, E (INFN, Milan) ; Fabbricatore, P (INFN, Genoa) ; Farinon, S (INFN, Genoa) ; Felice, H (CERN) ; Lackner, F (CERN) ; Levi, F (INFN, Genoa ; Genoa U.) et al.
The future of the particle accelerators points to a new CERN’s circular collider with an order of magnitude increase in the center-of-mass energy compared to the Large Hadron Collider (LHC). To achieve this increase from 14 TeV to 100 TeV a 100 km tunnel will be required to host the collider. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 1-5

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Optimization of Electromagnetic Design After Winding Tests for the Nb3Sn Cos-Theta Dipole Model for FCC-hh / Valente, R U (LASA, Segrate) ; Ballarino, A (CERN) ; Bersani, A (INFN, Genoa) ; Bracco, M (INFN, Genoa ; Genoa U.) ; Burioli, S (INFN, Genoa ; Genoa U.) ; Caiffi, B (INFN, Genoa) ; Coelli, S (LASA, Segrate) ; Matteis, E De (LASA, Segrate) ; Farinon, S (INFN, Genoa) ; Gagno, A (INFN, Genoa ; Genoa U.) et al.
The Future Circular Collider in hadron-hadron configuration (FCC-hh) is one of the main options for the post-LHC era of particle accelerator. The project led by CERN aims to build a 100 km-long collider with 100 TeV of center-of-mass energy, using bending dipoles able to achieve a bore field $>$14 T. [...]
2023 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4601107

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Updates on the Mechanical Design of FalconD, a Nb$_3$Sn Cos$\Theta$ Short Model Dipole for FCC-hh / Levi, F (INFN, Genoa ; Genoa U.) ; Ballarino, A (CERN) ; Bersani, A (INFN, Genoa) ; Bracco, M (INFN, Genoa ; Genoa U.) ; Burioli, S (INFN, Genoa ; Genoa U.) ; Caiffi, B (INFN, Genoa) ; Matteis, E De (LASA, Segrate) ; Farinon, S (INFN, Genoa) ; Gagno, A (INFN, Genoa ; Genoa U.) ; Mariotto, S (Julich, Forschungszentrum ; RWTH Aachen U. ; LASA, Segrate) et al.
As part of the research project called FCC-hh led by CERN, which aims to study the possibility of building a new 100 TeV center of mass energy particle collider along an 80-100 km circumference tunnel, there are many collaborations underway to test different designs for the main bending dipole of the collider. One of these collaborations involves INFN, the Italian Institute of Nuclear Physics, which has been working on the cos $\theta$design until 2019 as part of the European EuroCirCol project. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4000805

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Alignment & stability challenges for FCC-ee / Charles, Tessa K (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech. ; Manchester U.) ; Holzer, Bernhard (CERN) ; Tomas, Rogelio (CERN) ; Oide, Katsunobu (CERN ; KEK, Tsukuba) ; van Riesen-Haupt, Léon (Ecole Polytechnique, Lausanne) ; Zimmermann, Frank (CERN)
In order to achieve its ultra-low vertical emittance (1 pm) and high luminosity (of up to 230 \times 10^{34}\text{ cm}^{-2}\text{ s}^{-1} per collision point), the e$^{+}$e$^{−}$ Future Circular Collider (FCC-ee) requires a well-informed alignment strategy, powerful correction methods, and good understanding of the impact of vibrations. The large ring size, high natural chromaticity, small \beta ^{*}, and the low coupling ratio make the FCC-ee design susceptible to misalignment and field errors, which if not properly addressed, threaten to increase the horizontal and vertical emittances and adversely affect the luminosity. [...]
2023 - 19 p. - Published in : EPJ Tech. Instrum. 10 (2023) 8 Fulltext: PDF;

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Progress and R/D challenges for FCC-ee SRF / Venturini Delsolaro, W (CERN) ; Garlasche, M (CERN) ; Peauger, F (CERN) ; Rosaz, G (CERN) ; Karpov, I (CERN) ; Zhang, L (Beijing, Inst. High Energy Phys.) ; Valente Feliciano, A M (Jefferson Lab) ; Udongwo, S A (Rostock U.) ; Bianchi, A (CERN) ; Bellini, G (CERN) et al.
The FCC-ee machines present a huge challenge for the RF systems, which need to be adapted to very diverse beam conditions going from moderate energy and high current for the Z machine to high energy and low beam current for the ttbar. This inverse scaling results naturally from a fixed budget for the synchrotron radiation, which the SRF cavities need to compensate. [...]
2023 - 13 p. - Published in : EPJ Tech. Instrum. 10 (2023) 6 Fulltext: PDF;

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Wakefields of the FCC-ee collimation system / Behtouei, M. (Frascati) ; Carideo, E. (U. Rome La Sapienza (main) ; CERN) ; Zobov, M. (Frascati) ; Migliorati, M. (U. Rome La Sapienza (main) ; INFN, Rome)
The purpose of this paper is to calculate the longitudinal and transverse wakefields of the FCC collimators by using the electromagnetic codes ECHO3D and IW2D. [...]
- 12 p.

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Optics design and correction challenges for the high energy booster of FCC-ee / Chance, Antoine (IRFU, Saclay) ; Dalena, Barbara (IRFU, Saclay) ; Da Silva, Tatiana (IRFU, Saclay) ; Mashal, Ahmad (IPM, Tehran) ; Migliorati, Mauro (Rome U.) ; Ghribi, Adnan (IRFU, Saclay) ; Rajabi, Ali (DESY) ; Zimmermann, Frank (CERN)
One of the major upcoming challenges in particle physics is achieving precise measurements of the Z, W, and H bosons, as well as the top quark. [...]
- 9 p.

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Integrated stratigraphic, sedimentological and petrographical evaluation for CERN’s Future Circular Collider subsurface infrastructure (Geneva Basin, Switzerland-France) / Haas, Maximilian (CERN ; Geneva U.) ; Carraro, Davide (Geneva U.) ; Ventra, Dario (Geneva U.) ; Plötze, Michael (Zurich, ETH) ; De Haller, Antoine (Geneva U.) ; Moscariello, Andrea (Geneva U.)
AbstractThe European Organization for Nuclear Research (CERN) is currently undertaking a feasibility study to build the next-generation particle accelerator, named the Future Circular Collider (FCC), hosted in a 90–100 km subsurface infrastructure in the Geneva Basin, extending across western Switzerland and adjacent France. This article represents a preliminary, basin-scale stratigraphic and lithotype analysis using state-of-the-art Swiss and French stratigraphic terminology, set in context with the FCC. [...]
2022 - 43 p. - Published in : Swiss Journal of Geosciences 115 (2022) 16 Fulltext: PDF;

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Field quality and surface resistance studies of a superconducting REBa$_{2}$Cu$_{3}$O—Cu hybrid coating for the FCC beam screen / Telles, G T (Barcelona, Autonoma U.) ; Romanov, A (Barcelona, Autonoma U.) ; Calatroni, S (CERN) ; Granados, X (Barcelona, Autonoma U.) ; Puig, T (Barcelona, Autonoma U.) ; Gutierrez, J (Barcelona, Autonoma U.)
Abstract To ensure beam stability in the future circular collider study of the European Organization for Nuclear Research, RE(=Y, Gd, Eu)Ba2Cu3O 7 − x high-temperature superconductor was proposed as a low-surface impedance coating for its beam screen. Unfortunately, persistent currents in the superconductor will degrade the magnetic field homogeneity inside the beam chamber, endangering the stability of the beam trajectory. [...]
2023 - 14 p. - Published in : Supercond. Sci. Technol. 36 (2023) 045001

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