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Full seamless copper substrate accelerator cavity manufactured by tube hydroforming
/ Yamanaka, Masashi (KEK, Tsukuba) ; Nishi, Yuya (Unlisted, JP) ; Nishimori, Kazuki (Unlisted, JP) ; Iwamoto, Shinichi (Unlisted, JP) ; Garlaschè, Marco (CERN) ; Swieszek, Joanna Sylwia (CERN) ; Atieh, Said (CERN) ; Yamamoto, Akira (KEK, Tsukuba)
We successfully prototyped the world’s first 1.3 GHz one-cell full seamless copper cavity through tube hydroforming in 2023. Extensive research has been conducted to manufacture an accelerator cavity body from copper and coat it with niobium to provide superconductivity. [...]
2025 - 9 p.
- Published in : Int. J. Adv. Manuf. Technol. 138 (2025) 2543-2551
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Fabrication Summary
/ Atieh, Said (speaker) (CERN)
Fabrication technologies play a critical role in the development of accelerator components, ensuring high precision, reliability, and compliance with stringent functional and environmental requirements. This work presents an overview of key fabrication techniques used in accelerator technology, including precision machining, welding, sheet metal forming, and advanced multi-technology approaches. [...]
2024 - 3159.
CERN Accelerator School; Mechanical & Materials Engineering for Particle Accelerators and Detectors, 2-15 June 2024, Sint-Michielsgestel, Netherlands
External links: Talk details; Event details
In : Mechanical & Materials Engineering for Particle Accelerators and Detectors, 2-15 June 2024, Sint-Michielsgestel, Netherlands
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Characterization of the Formability of High-Purity Polycrystalline Niobium Sheets for Superconducting Radiofrequency Applications
/ Croteau, Jean-François (Unlisted, FR) ; Robin, Guillaume (U. Lorraine) ; Cantergiani, Elisa (Unlisted, FR) ; Atieh, Said (CERN) ; Jacques, Nicolas (Unlisted, FR) ; Mazars, Gilles (Unlisted, FR) ; Martiny, Marion (U. Lorraine)
The forming limit diagram (FLD) of high-purity niobium sheets used for the manufacturing of superconducting radiofrequency (SRF) cavities is presented. The Marciniak (in-plane) test was used with niobium blanks with a thickness of 1 mm and blank carriers of annealed oxygen-free electronic (OFE) copper. [...]
2021 - 7 p.
- Published in : J. Eng. Mater. Technol. 144 (2021) 021004
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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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HOM Couplers and RF Antennas for HL-LHC Crab Cavities: Developments for Manufacturing
/ Barrière, Simon (CERN) ; Atieh, Said (CERN) ; Bulat, Bartosz (CERN) ; Calaga, Rama (CERN) ; Calvo, Sebastien (CERN) ; Capatina, Ofelia (CERN) ; Demazière, Thomas (CERN) ; Favre, Gilles (CERN) ; Gallifa Terricabras, Adrià (CERN) ; Garlasché, Marco (CERN) et al.
Superconducting RF crab cavities are being manufactured as part of the High-Luminosity LHC project at CERN. Amongst its related ancillaries, radiofrequency HOM (High Order Modes) couplers and field antennas are essential for reaching nominal performance during operation with high energy beams, as they monitor and control the electromagnetic fields in the cavities. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 303-307
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.303-307
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State of the Art of Niobium Machining for SRF Applications
/ Naisson, Pierre (CERN) ; Atieh, Said (CERN) ; Dumont, Floriant (Lab. Hubert Curien, St. Etienne) ; Fabre, Dorian (Lab. Hubert Curien, St. Etienne) ; Scibor, Karol (CERN) ; Trubacova, Pavlina (CERN) ; Valiorgue, Frederic (Lab. Hubert Curien, St. Etienne)
Niobium is a demanding material to be machined. Its low hardness, high melting temperature and abrasivity leads to poor cutting condition, and surface quality and shape accuracy could be difficult to achieve, especially for complex shapes such as HOM antennas. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-SRF2019-MOP061
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.210-213
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