CERN Accelerating science

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1.
Electron Beam Characterization of REBCO-Coated Conductors at Cryogenic Conditions / Haubner, Michal (CERN ; Prague, Tech. U.) ; Krkotic, Patrick (CERN) ; Serafim, Catarina (CERN ; Helsinki U.) ; Petit, Valentine (CERN) ; Baglin, Vincent (CERN) ; Calatroni, Sergio (CERN) ; Henrist, Bernard (CERN) ; Romanov, Artur (Barcelona, Autonoma U.) ; Puig, Teresa (Barcelona, Autonoma U.) ; Gutierrez, Joffre (Barcelona, Autonoma U.)
Particle accelerators with superconducting magnets operating at cryogenic temperatures use a beam screen (BS) liner that extracts heat generated by the circulating bunched charge particle beam before it can reach the magnets. The BS surface, commonly made of high-conductivity copper, provides a low impedance for beam stability reasons, low secondary electron yield (SEY)to mitigate the electron-cloud (EC) effect, and low electron-stimulated desorption yield (ESD) to limit the dynamic pressure rise due to EC. [...]
arXiv:2410.00770.- 2023-02-21 - 15 p. - Published in : Appl. Sciences 13 (2023) 2765 Fulltext: 2410.00770 - PDF; document - PDF;
2.
RF Characterisation of New Coatings for Future Circular Collider Beam Screens / Krkotić, Patrick (CELLS - ALBA, LLS ; Barcelona, Polytechnic U.) ; Calatroni, Sergio (CERN) ; Granados, Xavier (Barcelona, Autonoma U.) ; Gutierrez, Joffre (Barcelona, Autonoma U.) ; Hannah, Adrian (Daresbury) ; Malyshev, Oleg B (Daresbury) ; O'Callaghan, J M (Barcelona, Polytechnic U.) ; Pérez, Francis (CELLS - ALBA, LLS) ; Pont, Montserrat (CELLS - ALBA, LLS) ; Puig, Teresa (Barcelona, Autonoma U.) et al.
For the future high energy colliders being under the design at this moment, the choice of a low surface impedance beam screen coating material has become of fundamental importance to ensure sufficiently low beam impedance and consequently guaranteed stable operation at high currents. We have studied the use of high-temperature superconducting coated conductors as possible coating materials for the beam screen of the FCC-hh. [...]
Geneva : JACoW, 2021 - 4 p. - Published in : JACoW IPAC 2021 (2021) 2453-2456 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2453-2456
3.
High frequency response of thick REBCO coated conductors in the framework of the FCC study / Romanov, Artur (CSIC, Catalunya) ; Krkotić, Patrick (CELLS - ALBA, LLS ; Barcelona, Polytechnic U.) ; Telles, Guilherme (CSIC, Catalunya) ; O'Callaghan, Joan (Barcelona, Polytechnic U.) ; Pont, Montse (CELLS - ALBA, LLS) ; Perez, Francis (CELLS - ALBA, LLS) ; Granados, Xavier (CSIC, Catalunya) ; Calatroni, Sergio (CERN) ; Puig, Teresa (CSIC, Catalunya) ; Gutierrez, Joffre (CSIC, Catalunya)
A thorough microwave response study of high temperature superconductors, considered as an alternative beam screen coating, has become integral in the design decisions for CERN’s future research infrastructure. Here, we present the surface resistance $R_{s}$ of various $\text {REBa}_{2}\text {Cu}_{3}\text {O}_{7-x}$ (RE = rare earth) coated conductors available in large scale as a function of magnetic field in a broad temperature range measured by a Hakki–Coleman type resonator with resonant frequency $\nu \approx {8}\,{\text {GHz}}$. [...]
2020 - 12 p. - Published in : Sci. Rep. 10 (2020) 12325 Fulltext: PDF;

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