TY  - CONF
AU  - Parise, M.
AU  - Berrutti, P.
AU  - Duchesne, P.
AU  - Longuevergne, D.
AU  - Passarelli, D.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - PIP-II SSR2 Cavities Fabrication and Processing Experience
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - The Proton Improvement Plan-II (PIP-II) linac will include 35 Single Spoke Resonators type 2 (SSR2). A pre-production SSR2 cryomodule will contain 5 jacketed cavities. Several units are already manufactured and prepared for cold testing. In this work, data collected from the fabrication, processing and preparation of the cavities will be presented and the improvements implemented after the completion of the first unit will be highlighted.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 526
EP  - 530
KW  - cavity
KW  - SRF
KW  - niobium
KW  - linac
KW  - target
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-TUPTB045
UR  - https://jacow.org/srf2023/papers/tuptb045.pdf
ER  - 

TY  - CONF
AU  - Pira, C.
AU  - Antoine, C.Z.
AU  - Azzolini, O.
AU  - Benjamin, C.
AU  - Berry, S.
AU  - Berton, R.
AU  - Bertucci, M.
AU  - Bonesso, M.
AU  - Bradley, J.W.
AU  - Burt, G.
AU  - Caforio, R.
AU  - Candela, S.
AU  - Candela, V.
AU  - Chyhyrynets, E.
AU  - Dima, R.
AU  - Favero, G.
AU  - Fonnesu, D.
AU  - Ford, D.
AU  - Garcia, V.A.
AU  - Hryhorenko, O.
AU  - Jiang, X.
AU  - Kalboussi, Y.
AU  - Keckert, S.
AU  - Keppel, G.
AU  - Knobloch, J.
AU  - Kugeler, O.
AU  - Leicester, N.L.
AU  - Longuevergne, D.
AU  - Malyshev, O.B.
AU  - Marconato, G.
AU  - Marks, N.
AU  - Medvids, A.
AU  - Mychko, A.
AU  - Onufrijevs, P.
AU  - Paparella, R.
AU  - Pepato, A.
AU  - Piccoli, D.
AU  - Piccoli, F.
AU  - Proslier, Th.
AU  - Prucnal, S.
AU  - Rebesan, P.
AU  - Ries, R.
AU  - Romanato, M.
AU  - Salmaso, A.
AU  - Seal, D.J.
AU  - Seiler, E.
AU  - Sian, B.S.
AU  - Simon, S.
AU  - Smith, L.G.P.
AU  - Squizzato, G.
AU  - Staedler, T.
AU  - Stivanello, F.
AU  - Telatin, F.
AU  - Turner, D.A.
AU  - Valente-Feliciano, A-M.
AU  - Valizadeh, R.
AU  - Zhou, S.
AU  - Zubtsovskii, A.O.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Progress in European Thin Film Activities
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - Thin-film cavities with higher Tc superconductors (SC) than Nb promise to move the operating temperature from 2 to 4.5 K with savings 3 orders of magnitude in cryogenic power consumption. Several European labs are coordinating their efforts to obtain a first 1.3 GHz cavity prototype through the I.FAST collaboration and other informal collaborations with CERN and DESY. R&D covers the entire production chain. In particular, new production techniques of seamless Copper and Niobium elliptical cavities via additive manufacturing are studied and evaluated. New acid-free polishing techniques to reduce surface roughness in a more sustainable way such as plasma electropolishing and metallographic polishing have been tested. Optimization of coating parameters of higher Tc SC than Nb (Nb₃Sn, V₃Si, NbTiN) via PVD and multilayer via ALD are on the way. Finally, rapid heat treatments such as Flash Lamp Annealing and Laser Annealing are used to avoid or reduce Cu diffusion in the SC film. The development and characterization of SC coatings is done on planar samples, 6 GHz cavities, choke cavities, QPR and 1.3 GHz cavities. This work presents the progress status of these coordinated efforts.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 607
EP  - 614
KW  - cavity
KW  - SRF
KW  - target
KW  - niobium
KW  - laser
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WECAA01
UR  - https://jacow.org/srf2023/papers/wecaa01.pdf
ER  - 

TY  - CONF
AU  - Kalboussi, Y.
AU  - Antoine, C.Z.
AU  - Asaduzzaman, M.
AU  - Baudrier, M.
AU  - Bertrand, Q.
AU  - Boulch, C.
AU  - Delatte, B.
AU  - Dragoe, D.
AU  - Jullien, G.
AU  - Junginger, T.
AU  - Lochet, N.
AU  - Longuevergne, D.
AU  - Maurice, L.
AU  - Miserque, F.
AU  - Proslier, Th.
AU  - Pépin-Donat, T.
AU  - Sahuquet, P.
AU  - Vacher, T.V.
AU  - Éozénou, F.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Surface Engineering by ALD for Superconducting RF Cavities
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - Atomic Layer Deposition is a synthesis method that enable a unique control of thin films chemical composition and thickness over complex shape objects such as SRF cavities. This level of control opens the way to new surface treatments and to study their effect on RF cavity performances. We will present coupon and, in some cases, preliminary cavity results, from various surface engineering routes based on the deposition of thin oxides and nitrides films combined with post annealing treatments and study their interactions with the niobium. Three main research directions will be presented: 1/ replacing the niobium oxides by other surface layers (Al₂O₃, Y2O3, MgO) and probe their effect on the low and high field performances, 2/ doping with N and combine approaches 1/ and 2/ and finally 3/ optimize the superconducting properties of NbTiN multilayers on Nb and Sapphire.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 615
EP  - 620
KW  - cavity
KW  - niobium
KW  - vacuum
KW  - SRF
KW  - site
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEIBA01
UR  - https://jacow.org/srf2023/papers/weiba01.pdf
ER  - 

TY  - CONF
AU  - Hryhorenko, O.
AU  - Antoine, C.Z.
AU  - Dohmae, T.
AU  - Keckert, S.
AU  - Knobloch, J.
AU  - Kugeler, O.
AU  - Longuevergne, D.
AU  - Proslier, Th.
AU  - Éozénou, F.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Recent Advances in Metallographic Polishing for SRF Application
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - This talk is an overview of the metallographic polishing R&D program covering Niobium and Copper substrates treatment for thin film coating as an alternative fabrication pathway for 1.3 GHz elliptical cavities. The presented research is the result of a collaborative effort between IJCLab, CEA/Irfu, HZB, and KEK in order to develop innovative surface processing and cavity fabrication protocols capable of meeting stringent requirements for SRF surfaces, including the reduction of safety risks and ecological footprint, enhancing reliability, improving the surface roughness, and potentially allowing cost reduction. The research findings will be disclosed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 646
EP  - 650
KW  - cavity
KW  - SRF
KW  - niobium
KW  - laser
KW  - framework
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEIXA06
UR  - https://jacow.org/srf2023/papers/weixa06.pdf
ER  - 

TY  - CONF
AU  - Hryhorenko, O.
AU  - Antoine, C.Z.
AU  - Dohmae, T.
AU  - Longuevergne, D.
AU  - Valizadeh, R.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Exploring Innovative Pathway for SRF Cavity Fabrication
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - This article shows a study on an alternative pathway for the fabrication of a complete 1.3 GHz SRF cavity, aiming at improving production reliability, reducing the use of chemical polishing (EP or BCP) which is a costly and safety-critical step, and preserving surface quality after forming. Unlike the conventional pathway, the fabrication process is performed after polishing. This point is crucial as the used polishing technology could be applied only to flat geometries. The performed investigation demonstrates that damages during the fabrication process are considered minor, localized, and limited to the near-surface. Moreover, these studies confirm that the damaged layer (100-200 µm) is mainly caused by the rolling process, and not by the subsequent fabrication steps. A laser confocal microscope and SEM-EBSD technique were used to compare samples before and after forming. The preliminary results are discussed and presented in this paper.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 680
EP  - 684
KW  - cavity
KW  - SRF
KW  - niobium
KW  - laser
KW  - electron
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB050
UR  - https://jacow.org/srf2023/papers/wepwb050.pdf
ER  - 

TY  - CONF
AU  - Longuevergne, D.
AU  - Berrutti, P.
AU  - Bippus, N.
AU  - Duchesne, P.
AU  - Gandolfo, N.
AU  - Helsper, J.
AU  - Kazakov, S.
AU  - Le Dréan, D.
AU  - Mavilla, G.
AU  - Parise, M.
AU  - Passarelli, D.
AU  - Pépin-Donat, T.
AU  - Roset, S.
AU  - Solyak, N.
AU  - Sukhanov, A.I.
AU  - Vogt, L.M.
AU  - Wallon, S.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Contribution of IN2P3 to PIP-II Project: Plans and Progress
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - IJCLab is one of the labs of IN2P3 (National institute of nuclear and particle physics), one of the ten research institutes composing the French National Center for Scientific Research (CNRS). Since 2018, IJCLab has been involved in the PIP-II project, assisting with the design, development, and qualification of accelerator components for the SSR2 (Single Spoke Resonator type 2) section of the superconducting linac. The first pre-production components (cavity, coupler, and tuner) have been fabricated, and some of the first qualification tests have been performed at IJCLab. This paper will summarize the complete scope of IJCLab¿s contributions to PIP-II and give updates on the performances of the first pre-production components.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 714
EP  - 717
KW  - cavity
KW  - SRF
KW  - linac
KW  - vacuum
KW  - status
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB058
UR  - https://jacow.org/srf2023/papers/wepwb058.pdf
ER  - 

TY  - CONF
AU  - Helsper, J.
AU  - Kazakov, S.
AU  - Longuevergne, D.
AU  - Passarelli, D.
AU  - Solyak, N.
AU  - Wallon, S.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Design, Manufacturing, Assembly, and Lessons Learned of the Pre-Production 325 MHz Couplers for the PIP-II Project at Fermilab
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - Five 325 MHz high-power couplers will be integrated into the pre-production Single Spoke Resonator Type-II (ppSSR2) cryomodule for the PIP-II project at Fermilab. Couplers were procured by both Fermilab and IJCLAB for this effort. The design of the coupler is described, including design optimizations from the previous generation. This paper then describes the coupler life cycle, including design, manufacturing, and assembly, along with the lessons learned at each stage.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 806
EP  - 811
KW  - vacuum
KW  - cavity
KW  - SRF
KW  - interface
KW  - cryomodule
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB094
UR  - https://jacow.org/srf2023/papers/wepwb094.pdf
ER  - 

TY  - CONF
AU  - Solyak, N.
AU  - Hanna, B.M.
AU  - Helsper, J.
AU  - Kazakov, S.
AU  - Passarelli, D.
AU  - Wallon, S.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Testing and Processing of Pre-production 325 MHz Single Spoke Resonator Power Couplers for PIP-II Project
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - Fundamental 325 MHz power couplers are designed, built and tested for SSR cavities in PIP-II project [1]. Couplers should work in CW mode at power level 7.5kW w/o beam and ~15 kW with the 2 mA beam. At pre-production stage we built and tested 6 couplers, produced by CPI (FNAL) and PMB (IJCLab) and 4 more couplers will be tested soon. Two of tested cou-plers had TiN coated ceramic window. In warm test stand two couplers were mounted on the coupling chamber and tested in SW regime at full reflection with phase controlled by position of short and reflection insert. Couplers were tested at pulse mode (up to 25kW) and cw mode (12kW) with HV bias or without bias. Test results demonstrated that 3.5 kV DC bias completely suppresses multipactor in coupler. Vacuum activity in coupler was controlled by e-pickups and build-in vacuum gauges, located near the vacuum side of window. Power processing without DC bias was done for several couplers with and without TiN coating on ceramic window. Test results are presented and discussing in paper.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 816
EP  - 819
KW  - vacuum
KW  - cavity
KW  - coupling
KW  - SRF
KW  - pick-up
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB097
UR  - https://jacow.org/srf2023/papers/wepwb097.pdf
ER  - 

TY  - CONF
AU  - Barbagallo, C.
AU  - Barriere, B.S.
AU  - Clement, C.S.
AU  - Duchesne, P.
AU  - Gerard, R.L.A.
AU  - Gerigk, F.
AU  - Henry, J.
AU  - Kaabi, W.
AU  - Maurin, P.M.
AU  - Olivier, G.
AU  - Olry, G.
AU  - Overstreet, S.A.
AU  - Park, G.-T.
AU  - Rimmer, R.A.
AU  - Roset, S.
AU  - Wang, H.
AU  - Zomer, Z.F.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Simulations and First RF Measurements of Coaxial HOM Coupler Prototypes for PERLE SRF Cavities
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - Superconducting Radio-Frequency (SRF) linac cryomodules are foreseen for the high-current multi-turn energy recovery linac PERLE (Powerful Energy Recovery Linac for Experiments). Coaxial higher order mode (HOM) couplers are the primary design choice to absorb beam-induced power and avoid beam instabilities. We have used 3D-printed and copper-coated HOM couplers for the prototyping and bench RF measurements on the copper PERLE cavities. We have started a collaboration with JLab and CERN on this effort. This paper presents electromagnetic simulations of the cavity HOM-damping performance on those couplers. Bench RF measurements of the HOMs on an 801.58 MHz 2-cell copper cavity performed at JLab are detailed. The results are compared to eigenmode simulations in CST to confirm the design. RF-thermal simulations are conducted to investigate if the studied HOM couplers undergo quenching.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 831
EP  - 834
KW  - HOM
KW  - cavity
KW  - damping
KW  - coupling
KW  - simulation
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB103
UR  - https://jacow.org/srf2023/papers/wepwb103.pdf
ER  - 

TY  - CONF
AU  - ElKamchi, N.
AU  - Berthelot, S.
AU  - Duchesne, P.
AU  - Gómez Martínez, Y.
AU  - Joly, C.
AU  - Kaabi, W.
AU  - Lhomme, C.
AU  - Magueur, C.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - RF Conditioning of MYRRHA Couplers at IJCLab
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - Multi-purpose hYbrid Research Reactor for High-tech Applications (MYRRHA) is an experimental accelerator-driven system in development at SCK•CEN. It will allow fuel developments, material developments for GEN IV systems, material developments for fusion reactors and radioisotope production for medical and industrial applications1. The IJCLab has in charge the industrial monitoring, the quality control and the RF conditioning of the power couplers up to 80KW at 352Mhz. This paper presents the conditioning bench adapted from the successful experience of IJCLab in the conditioning of the XFEL couplers2. The results of the conditioning of prototype couplers are described and discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 835
EP  - 837
KW  - vacuum
KW  - electron
KW  - cavity
KW  - FEL
KW  - multipactoring
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB104
UR  - https://jacow.org/srf2023/papers/wepwb104.pdf
ER  - 

TY  - CONF
AU  - Gómez Martínez, Y.
AU  - Duchesne, P.
AU  - Dumont, P.-O.
AU  - ElKamchi, N.
AU  - Joly, C.
AU  - Kaabi, W.
AU  - Lhomme, C.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Improved Study of the Multipactor Phenomenon for the MYRRHA 80 kW CW RF Couplers
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - MYRRHA (Multi Purpose Hybrid Reactor for High Tech Applications) is an Accelerator Driven System (ADS) project. Its superconducting linac will provide a 600 MeV - 4 mA proton beam. The first project phase based on a 100 MeV linac is launched. The Radio-Frequency (RF) couplers have been designed to handle 80 kW CW (Continuous Wave) at 352.2 MHz. This paper describes the multipactor studies on the coupler when it does not work in the nominal configuration without reflected power.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 838
EP  - 840
KW  - multipactoring
KW  - electron
KW  - coupling
KW  - linac
KW  - cavity
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB105
UR  - https://jacow.org/srf2023/papers/wepwb105.pdf
ER  - 

TY  - CONF
AU  - Gandolfo, N.
AU  - Duchesne, P.
AU  - Le Dréan, D.
AU  - Longuevergne, D.
AU  - Mavilla, G.
AU  - Parise, M.
AU  - Passarelli, D.
AU  - Pischalnikov, Y.M.
AU  - Pépin-Donat, T.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Prototype SSR2 Tuner Procurement and Testing at IJCLab for PIP-II Project
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - IJCLab is involved in the PIP-II project on the design and development of accelerator components for the SSR2 (Single Spoke Resonator type 2) section of the superconducting linac. Five prototype tuners have been built and are being tested at IJCLab. After a short description of the tuner, this paper reports on the procurement strategy and the performance observed at both room and low temperatures in vertical cryostat test with SSR2 prototype cavities. This paper will also share results on accelerated lifetime tests performed in a dedicated nitrogen-cooled cryostat.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 917
EP  - 920
KW  - cavity
KW  - vacuum
KW  - insertion
KW  - SRF
KW  - cryomodule
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-WEPWB137
UR  - https://jacow.org/srf2023/papers/wepwb137.pdf
ER  - 

TY  - CONF
AU  - Miyazaki, A.
AU  - Duchesne, P.
AU  - Le Dréan, D.
AU  - Longuevergne, D.
AU  - Olry, G.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Performance Analysis of Spoke Resonators, Statistics from Cavity Fabrication to Cryomodule Testing
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - Irène Joliot-Curie Laboratory (IJCLab) has been leading the development of spoke resonators in multiple interna- tional SRF projects, from fundamental R&D, prototyping, to series production. The European Spallation Source (ESS) superconducting linac is the first of its kind to put into op- eration the spoke resonators. After three prototype cavities, 29 ESS production cavities have been processed, tested, as- sembled into cryomodules at IJCLab, and then shipped to Uppsala for the site acceptance test. Seven prototypes for two other major projects, Multi-purpose hYbrid Research Reactor for High-tech Application (MYRRHA) and Proton Improvement Plan II (PIP-II), designed in collaboration with external institutions, have as well been processed and tested at IJCLab. A new challenge is to fully process series cavi- ties in industry, following the successful implementation of 1.3 GHz elliptical cavities in the other projects. This paper summarises main results obtained from fabrication to final testing, including frequency tuning strategy, performance, limitation in vertical cryostat, and identifies future direction of projects and R&D in the field of spoke cavities.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 940
EP  - 946
KW  - cavity
KW  - SRF
KW  - operation
KW  - cryomodule
KW  - proton
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-THIAA04
UR  - https://jacow.org/srf2023/papers/thiaa04.pdf
ER  -