002799348 001__ 2799348
002799348 003__ SzGeCERN
002799348 005__ 20220117124255.0
002799348 0247_ $$2DOI$$9IOP$$a10.1088/1361-6668/ac4465
002799348 0248_ $$aoai:cds.cern.ch:2799348$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002799348 035__ $$9https://inspirehep.net/api/oai2d$$aoai:inspirehep.net:2006565$$d2022-01-11T15:29:59Z$$h2022-01-12T05:00:02Z$$mmarcxml
002799348 035__ $$9Inspire$$a2006565
002799348 041__ $$aeng
002799348 100__ $$aKrkotić, P$$jORCID:0000-0003-1892-0350$$uCELLS - ALBA, LLS$$uBarcelona, Polytechnic U.$$vCommsenslab, Department of Signal Theory and Communications, Universitat Politècnica de Catalunya (UPC), C/Jordi Girona 1, 08034 Barcelona, Spain
002799348 245__ $$9IOP$$aEvaluation of the nonlinear surface resistance of REBCO coated conductors for their use in the FCC-hh beam screen
002799348 260__ $$c2022
002799348 300__ $$a11 p
002799348 520__ $$9IOP$$aTo assess the feasibility of using high-temperature superconductors for the beam screens of future circular colliders, we have undertaken a study of the power dependence of the microwave surface resistance in state-of-the-art REBCO coated conductors at about 8 GHz and 50 K. We have employed a dielectric resonator to produce radio-frequency (RF) electromagnetic fields on the surface of the coated conductors having amplitudes similar to those generated by proton bunches circulating in the vacuum chamber of the proposed future circular collider Hadron-Hadron (FCC-hh) at CERN We show that surface resistances in REBCO coated conductors without artificial pinning centers are more affected by a RF magnetic field than those containing nano-inclusions. Despite that, at 8 GHz, 50 K, and 9 T, most REBCO coated conductors studied outperform copper in terms of surface resistance, with the best sample having a 2.3 mΩ surface resistance while being subject to an RF field 2.5 times stronger than that in the FCC-hh. We also extrapolate the measured data to 16 T and 1 GHz, the actual FCC-hh dipole magnetic field, and the mid-beam frequency spectrum, demonstrating the possibility of lowering the surface resistance of the vacuum chamber by up to two orders of magnitude compared to copper. Further, we discuss the correlation between the time structure of the electromagnetic fields provided by vector network analyzers compared to the proton bunches’ time structure in the collider and present the effect of low alternating magnetic fields on vortex displacement and the possibility of demagnetization of superconducting samples.
002799348 540__ $$aCC-BY-4.0$$bIOP$$uhttp://creativecommons.org/licenses/by/4.0
002799348 542__ $$dThe Author(s)$$g2022
002799348 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
002799348 6531_ $$9author$$acoated conductors
002799348 6531_ $$9author$$afuture circular collider
002799348 6531_ $$9author$$ahigh-temperature superconductor
002799348 6531_ $$9author$$asurface resistance
002799348 690C_ $$aARTICLE
002799348 690C_ $$aCERN
002799348 693__ $$sCERN FCC
002799348 700__ $$aRomanov, A$$uBarcelona, Autonoma U.
002799348 700__ $$aTagdulang, N$$jORCID:0000-0002-6248-0906$$uCELLS - ALBA, LLS$$uBarcelona, Polytechnic U.$$vCommsenslab, Department of Signal Theory and Communications, Universitat Politècnica de Catalunya (UPC), C/Jordi Girona 1, 08034 Barcelona, Spain
002799348 700__ $$aTelles, G$$jORCID:0000-0002-2620-7283$$uBarcelona, Autonoma U.
002799348 700__ $$aPuig, T$$uBarcelona, Autonoma U.
002799348 700__ $$aGutierrez, J$$jORCID:0000-0002-8897-0276$$uBarcelona, IFAE
002799348 700__ $$aGranados, X$$uBarcelona, Autonoma U.
002799348 700__ $$aCalatroni, S$$jORCID:0000-0002-2769-8029$$uCERN
002799348 700__ $$aPerez, F$$uCELLS - ALBA, LLS
002799348 700__ $$aPont, M$$jORCID:[email protected]$$uCELLS - ALBA, LLS
002799348 700__ $$aO’Callaghan, J M$$jORCID:0000-0002-2740-0202$$uBarcelona, Polytechnic U.
002799348 773__ $$c025015$$n2$$pSupercond. Sci. Technol.$$v35$$y2022
002799348 8564_ $$82345893$$s1893142$$uhttps://cds.cern.ch/record/2799348/files/document.pdf$$yFulltext
002799348 960__ $$a13
002799348 980__ $$aARTICLE