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Investigating the Superconducting Properties and Surface Morphology of Sputtered Nb Films on Cu Due to Laser Treatment
/ Turner, Daniel Andrew (Lancaster U.) ; Malyshev, O B (Cockcroft Inst. Accel. Sci. Tech.) ; Burt, G (Lancaster U.) ; Seiler, E (Bratislava, Inst. Phys.) ; Ries, R (Bratislava, Inst. Phys.) ; Medvids, A (Riga Tech. U.) ; Onufrijevs, P (Riga Tech. U.) ; Valizadeh, R (Cockcroft Inst. Accel. Sci. Tech.) ; Sublet, A (CERN) ; Pira, C (INFN, Legnaro) et al.
Bulk niobium is currently the material of choice for superconducting radio frequency (SRF) cavities and is a well matured process. However, it is possible that SRF cavities could be further improved beyond bulk Nb by sputtering thin Nb films onto Cu cavities. [...]
2023 - 12 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 1-12
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Next-Generation Superconducting RF Technology based on Advanced Thin Film Technologies and Innovative Materials for Accelerator Enhanced Performance and Energy Reach
/ Valente-Feliciano, A.-.M. (Jefferson Lab) ; Antoine, C. (Jefferson Lab ; IRFU, Saclay, DACM) ; Anlage, S. (Maryland U.) ; Ciovati, G. (Jefferson Lab) ; Delayen, J. (Jefferson Lab ; Old Dominion U.) ; Gerigk, F. (CERN) ; Gurevich, A. (Old Dominion U.) ; Junginger, T. (TRIUMF ; Victoria U.) ; Keckert, S. (Helmholtz-Zentrum, Berlin) ; Keppe, G. (INFN, Legnaro) et al.
Superconducting RF is a key technology for future particle accelerators, now relying on advanced surfaces beyond bulk Nb for a leap in performance and efficiency. [...]
arXiv:2204.02536.
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29.
eConf - Fulltext
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Magnetic Field Penetration of Niobium Thin Films Produced by the ARIES Collaboration
/ Turner, Daniel (Cockcroft Inst. Accel. Sci. Tech. ; Lancaster U. (main)) ; Burt, Graeme (Cockcroft Inst. Accel. Sci. Tech. ; Lancaster U. (main)) ; Chyhyrynets, Eduard (INFN, Legnaro) ; Dumbell, Keith (Cockcroft Inst. Accel. Sci. Tech. ; Daresbury) ; Junginger, Tobias (TRIUMF ; U. Victoria (main)) ; Leith, Stewart (U. Siegen (main)) ; Malyshev, Oleg (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Medvids, Arturs (Riga Tech. U.) ; Onufrijevs, Pavels (Riga Tech. U.) ; Pira, Cristian (INFN, Legnaro) et al.
Superconducting (SC) thin film coatings on Cu substrates are already widely used as an alternative to bulk Nb SRF structures. Using Cu allows improved thermal stability compared to Nb due to having a greater thermal conductivity. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 77-81
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.77-81
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Main Highlights of ARIES WP15 Collaboration
/ Malyshev, Oleg (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Antoine, Claire (IRFU, Saclay) ; Azzolini, Oscar (INFN, Legnaro) ; Burt, Graeme (Cockcroft Inst. Accel. Sci. Tech. ; Lancaster U. (main)) ; Chyhyrynets, Eduard (INFN, Legnaro) ; Goudket, Philippe (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Keppel, Giorgio (INFN, Legnaro) ; Kugeler, Oliver (Helmholtz-Zentrum, Berlin) ; Leith, Stewart (U. Siegen (main)) ; Medvids, Arturs (Riga Tech. U.) et al.
An international collaboration of research teams from CEA (France), CERN (Switzerland), INFN/LNL (Italy), HZB and USI (Germany), IEE (Slovakia), RTU (Latvia) and STFC/DL (UK), are working together on better understanding of how to improve the properties of superconducting thin films (ScTF) for RF cavities. The collaboration has been formed as WP15 in the H2020 ARIES project funded by EC. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 571-575
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.571-575
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Thick Film Morphology and SC Characterizations of 6 GHz Nb/Cu Cavities
/ Garcia Diaz, Vanessa (INFN, Legnaro ; U. Ferrara (main)) ; Azzolini, Oscar (INFN, Legnaro) ; Chyhyrynets, Eduard (INFN, Legnaro) ; Fonnesu, Dorothea (CERN) ; Keppel, Giorgio (INFN, Legnaro) ; Kugeler, Oliver (Helmholtz-Zentrum, Berlin) ; Pira, Cristian (INFN, Legnaro) ; Stivanello, Fabrizio (INFN, Legnaro) ; Tikhonov, Dmitry (Helmholtz-Zentrum, Berlin) ; Valizadeh, Reza (Daresbury) et al.
Thick films deposited in long pulse DCMS mode onto 6 GHz copper cavities have demonstrated the mitigation of the Q-slope at low accelerating fields. The Nb thick films (~40 microns) show the possibility to reproduce the bulk niobium superconducting properties and morpholo-gy characterizations exhibited dense and void-free films that are encouraging for the scaling of the process to 1.3 GHz cavities. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 18-22
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.18-22
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Synthesis of Nb and Alternative Superconducting Film to Nb for SRF Cavity as Single Layer
/ Valizadeh, Reza (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Antoine, Claire (IRFU, Saclay) ; Chyhyrynets, Eduard (INFN, Legnaro) ; Goudket, Philippe (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Hannah, Adrian (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Kugeler, Oliver (Helmholtz-Zentrum, Berlin) ; Leith, Stewart (U. Siegen (main)) ; Malyshev, Oleg (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Medvids, Arturs (Riga Tech. U.) ; Onufrijevs, Pavels (Riga Tech. U.) et al.
The production of superconducting coatings for radio frequency (RF) cavities has been developed over several decades. It is widely accepted that for any further improvement in cavity RF performance, innovation is needed and one may have to turn to other forms of Nb and other superconducting materials. [...]
2022 - 6 p.
- Published in : JACoW SRF 2021 (2022) 893-898
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.893-898
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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
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Laser ablated surface engineering: from discovery to machine application
/ Valizadeh, R (Daresbury) ; Malyshev, O b (Daresbury) ; Sian, T (Daresbury ; U. Manchester (main)) ; Colligon, J S (Daresbury) ; Li, Q (U. Liverpool (main)) ; Perrie, W (U. Liverpool (main))
In the past few years we have established that Laser Ablation Surface Engineering (LASE) is a very effective way of producing surfaces which have Secondary Electron yields (SEY) < 1. These can be achieved with a variety of laser pulse durations from nano- to pico seconds. [...]
2020 - 8 p.
Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.209-216 (CERN-2020-007)
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