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RF Performance Results of RF Double Quarter Wave Resonators for LHC High Luminosity Project
/ Turaj, Katarzyna (CERN) ; Bastard, Jeremy (CERN) ; Calaga, Rama (CERN) ; Calvo, Sebastien (CERN) ; Capatina, Ofelia (CERN) ; Castilla, Alejandro (CERN ; Jefferson Lab) ; Chiodini, Marco (CERN) ; Duval, Christophe (CERN) ; Edwards, Amelia (CERN ; Lancaster U.) ; Ferreira, Leonel (CERN) et al.
The LHC High Luminosity (HL-LHC) project includes, among other key items, the installation of superconducting crab cavities in the LHC machine. The Double Quarter Wave (DQW) crab cavity will be utilised to compensate for the effects of the vertical crossing angle [...]
2023 - 7 p.
- Published in : JACoW SRF 2023 (2023) 925-928
Fulltext: PDF;
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.925-928
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2.
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Results of the R&D; RF Testing Campaign of 1.3 GHz Nb/Cu Cavities
/ Vega Cid, Lorena (CERN) ; Bellini, Gloria (CERN) ; Bianchi, Antonio (CERN) ; Ferreira, Leonel (CERN) ; Leith, Stewart (CERN) ; Pereira Carlos, Carlota (CERN) ; Rosaz, Guillaume (CERN) ; Venturini Delsolaro, Walter (CERN)
In the context of the R&D; program on Nb/Cu carried out at CERN, a total of 25 tests have been performed since 2021. This talk will present these results. [...]
2023 - 6 p.
- Published in : JACoW SRF 2023 (2023) 621-626
Fulltext: PDF;
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.621-626
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3.
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4.
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Seamless 1.3 GHz Copper Cavities for Nb Coatings: Cold Test Results of Two Different Approaches
/ Vega Cid, Lorena (CERN) ; Atieh, Said (CERN) ; Ferreira, Leonel (CERN) ; Laín-Amador, Lucia (CERN) ; Leith, Stewart (CERN) ; Pereira Carlos, Carlota (CERN) ; Rosaz, Guillaume (CERN) ; Scibor, Karol (CERN) ; Venturini Delsolaro, Walter (CERN) ; Vidal García, Pablo (CERN ; Madrid, CIEMAT)
A necessary condition for high SRF performances in thin film coated cavities is the absence of substrate defects. For instance, in the past, defects originated around electron beam welds in high magnetic field areas have been shown to be the cause of performance limitations in Nb/Cu cavities. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 498-502
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.498-502
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5.
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Surface Polishing Facility for Superconducting RF Cavities at CERN
/ Ferreira, Leonel (CERN) ; Chritin, Nicolas (CERN) ; Ferreira, Rodrigo (CERN) ; Gerbet, Valentin (CERN)
A new SRF cavity polishing facility which covers the needs for present projects like the HL-LHC and its CRAB cavities as well as ongoing and future activities in the frame of the FCC study was commissioned at CERN in 2019. This facility can handle chemical and electrochemical polishing baths, can process both niobium and copper-based cavities on a wide range of geometries, starting at 400 MHz up to 1.3 GHz for elliptical type of cavities and more complex shapes as defined by the DQW and RFD CRAB design. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 387-391
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.387-391
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6.
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RF Dipole Crab Cavity Testing for HL-LHC
/ Valverde Alonso, Nuria (CERN) ; Calaga, Rama (CERN) ; Calvo, Sebastien (CERN) ; Capatina, Ofelia (CERN) ; Castilla, Alejandro (CERN ; Lancaster U. (main)) ; Chiodini, Marco (CERN) ; Duval, Christophe (CERN) ; Ferreira, Leonel (CERN) ; Gourragne, Max (CERN) ; Kohler, Paul (CERN) et al.
RF Crab Cavities are an essential element of the High Luminosity LHC (HL-LHC) upgrade at CERN. Two RF dipole crab cavity used for the compensation of the horizontal crossing angle were recently manufactured and integrated into Titanium Helium tank and RF ancillaries necessary for the beam operation. [...]
2022 - 7 p.
- Published in : JACoW SRF 2021 (2022) 687-693
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.687-693
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7.
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Development of copper electroformed vacuum chambers with integrated non-evaporable getter thin film coatings
/ Amadora, Lucia Lain (CERN ; UTINAM, Besancon) ; Chiggiato, Paolo (CERN) ; Ferreira, Leonel M A (CERN) ; Nistor, Valentin (CERN) ; Fontenla, Ana T Perez (CERN) ; Taborelli, Mauro (CERN) ; Vollenberg, Wilhelmus (CERN) ; Doche, Marie-Laure (UTINAM, Besancon) ; Hihn, Jean-Yves (UTINAM, Besancon)
First results concerning a new approach of TiZrV non-evaporable getter (NEG) thin films coating on very small diameter vacuum chambers are presented. This new process is based on the electroforming of a vacuum chamber around a sacrificial mandrel, which is precoated with a NEG thin film. [...]
2017
- Published in : J. Vac. Sci. Technol. A 36 (2018) 021601
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8.
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Upgrade of PIAVE Superconducting RFQs at INFN-Legnaro
/ Bisoffi, Giovanni (INFN, Legnaro) ; Andreev, Vladimir (Moscow, ITEP) ; Bissiato, Enzo (INFN, Legnaro) ; Bortolato, Damiano (INFN, Legnaro) ; Bosotti, Angelo (LASA, Segrate) ; Chiurlotto, Francesca (INFN, Legnaro) ; Contran, Tiziano (INFN, Legnaro) ; Fagotti, Enrico (INFN, Legnaro) ; Ferreira, Leonel (CERN) ; Kasprzak, Karol (Cracow, INP) et al.
Superconducting RFQs (SRFQs), the first SC RFQs ever made operational for users, have been operated on the PIAVE SC heavy ion linac injector at INFN-Legnaro since 2006. The structure is split into two resonators and is limited to the accelerating RFQ sections. [...]
2018 - 4 p.
- Published in : (2018) , pp. THPAL007
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 082008
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAL007
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Determining BCP Etch Rate and Uniformity in High Luminosity LHC Crab Cavities
/ Jones, Thomas (Daresbury ; Lancaster U. (main)) ; Burt, Graeme (Lancaster U. (main)) ; Calaga, Rama (CERN) ; Capatina, Ofelia (CERN) ; Ferreira, Leonel (CERN) ; Leuxe, Raphael (CERN) ; Mitchell, James (Lancaster U. (main)) ; Pattalwar, Shrikant (Daresbury) ; Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Xiao, Binping (Brookhaven Natl. Lab.)
The compact SRF Crab Cavities required for HL-LHC have complex geometries making prediction of average and local BCP etch rates a difficult task. This paper describes a series of experiments and simulations used to determine the etch uniformity and rate within these structures. [...]
2018 - 5 p.
- Published in : 10.18429/JACoW-SRF2017-TUPB100
External link: Fulltext
In : 18th International Conference on RF Superconductivity, Lanzhou, China, 17 - 21 Jul 2017, pp.TUPB100
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10.
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