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1.
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Mitigation of Helium Leakage Risks Within the Cryostat of ITER Including Diagnosing the Occurrence of Stress Corrosion Cracking Within the Thermal Shield Cryogenic Helium Pipes
/ Pearce, Robert (Euratom, St. Paul Lez Durance) ; Bersier, J L (Euratom, St. Paul Lez Durance) ; Iannetti, A (Euratom, St. Paul Lez Durance) ; Jarrige, C (Euratom, St. Paul Lez Durance) ; Kang, D (Euratom, St. Paul Lez Durance) ; Laugier, D (Euratom, St. Paul Lez Durance) ; Nasluzov, S (Euratom, St. Paul Lez Durance) ; Noh, C H (Euratom, St. Paul Lez Durance) ; Thapa, B (Euratom, St. Paul Lez Durance) ; Worth, L (Euratom, St. Paul Lez Durance) et al.
The insulating vacuum within the ITER Cryostat has a prime purpose to minimize the heat load on the superconducting coil system by gas thermal conductivity. These coils are shielded from thermal radiation by an 80 K helium-cooled silver-coated thermal shield (TS) consisting of ~500 panels. [...]
2024 - 7 p.
- Published in : IEEE Trans. Plasma Sci. 52 (2024) 3680-3686
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2.
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Advanced examination of Nb$_{3}$Sn coils and conductors for the LHC luminosity upgrade: a methodology based on computed tomography and materialographic analyses
/ Santillana, I Aviles (CERN) ; Sgobba, S (CERN) ; Crouvizier, M D (CERN) ; Devred, A (CERN) ; Izquierdo, G Arnau (CERN) ; Bulat, B (CERN) ; Moros, A (CERN) ; Izquierdo Bermudez, S (CERN) ; Milanese, A (CERN) ; Savary, F (CERN) et al.
The future of particle accelerators is strongly linked to the development of high—field magnets. The European Organization for Nuclear Research (CERN) is currently developing Nb$_{3}$Sn-based magnets for the high-luminosity upgrade of the large hadron collider (HL-LHC), to fully exploit its potential and surpass the intrinsic performance limitations of Nb–Ti-based magnets. [...]
2024 - 14 p.
- Published in : Supercond. Sci. Technol. 37 (2024) 085007
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3.
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Analysis of the Leakage Events in the Thermal Shield Cooling Pipes of the ITER Magnet System
/ Sgobba, Stefano (CERN) ; Santillana, Ignacio Aviles (CERN) ; Celuch, Michal (CERN) ; Crouvizier, Mickaël (CERN) ; Perez Fontenla, Ana Teresa (CERN) ; Castro, Enrique Rodriguez (CERN) ; Mitchell, Neil (Euratom, St. Paul Lez Durance) ; Koizumi, Norikiyo (Euratom, St. Paul Lez Durance) ; Pearce, Robert (Euratom, St. Paul Lez Durance) ; Worth, Liam (Euratom, St. Paul Lez Durance) et al.
The ITER Thermal Shields (TS) consist of actively cooled stainless steel panels. Their role is to minimise the radiation heat load from warm components, such as the Vacuum Vessel (VV) and the cryostat, hence contributing to insulating the magnet system operating at 4.5 K. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4203405
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4.
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Environmental Stress Cracking of Thermoplastic Polyimide Insulated Wires
/ Piccin, R (CERN) ; Rigaud, J S (CERN) ; Santillana, I A (CERN) ; Buchanan, K E (CERN) ; Ternova, D (CERN) ; Mitchell, N (Euratom, St. Paul Lez Durance) ; Liao, M (Euratom, St. Paul Lez Durance) ; Luongo, C (EUROfusion Consortium, Garching)
Polyimide is often the first choice to insulate instrumentation and magnet wires working under demanding environmental and operating conditions since it shows good mechanical properties at low temperatures and high radiation resistance. Nevertheless, we have recently discovered that thermoplastic polyimide (TPI) insulated wires may suffer an accelerated brittle failure from a combination of environmental and mechanical stress, summarized as environmental stress cracking (ESC). [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 7700405
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5.
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Advanced ultrasonic examination of heavy–gauge high strength studs for the ITER toroidal field gravity supports
/ Santillana, I Aviles (CERN) ; Izquierdo, G Arnau (CERN) ; Bonnin, S (Neuchatel U.) ; Celuch, M (CERN) ; Castro, E Rodriguez (CERN ; Carlos III U., Madrid) ; Sgobba, S (CERN) ; Beemsterboer, C (Euratom, St. Paul Lez Durance) ; Liao, M (Euratom, St. Paul Lez Durance) ; Schild, T (Euratom, St. Paul Lez Durance) ; Han, S (Euratom, St. Paul Lez Durance) et al.
The ITER Tokamak will include the largest superconducting magnet system ever built, with 50 GJ of stored energy. A series of structural elements guarantee its integrity under extreme load and temperature conditions. [...]
2023 - 4 p.
- Published in : Fusion Eng. Des. 194 (2023) 113900
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7.
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8.
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Failure analysis of a heavy gauge fastener of the ITER toroidal field gravity support system
/ Sgobba, Stefano (CERN) ; Santillana, Ignacio Aviles (CERN) ; Buchanan, Katie Elizabeth (CERN) ; Celuch, Michal Dalemir (CERN) ; Crouvizier, Mickaël (CERN) ; Fontenla, Ana Teresa Perez (CERN) ; Castro, Enrique Rodriguez (CERN ; Carlos III U., Madrid) ; Beemsterboer, Cornelis (Euratom, St. Paul Lez Durance) ; Liao, Min (Euratom, St. Paul Lez Durance) ; Schild, Thierry (Euratom, St. Paul Lez Durance) et al.
The Gravity Supports (GS) of the ITER Toroidal Field (TF) coils are positioned at the bottom of the machine and
are situated under the 18 toroidal field coils. Each support includes 26 high strength bolts with M60 and M85
gauge. [...]
2023 - 5 p.
- Published in : Fusion Eng. Des. 186 (2023) 113353
Fulltext: PDF;
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9.
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Metallurgical assessment of large size tensioning components for the precompression structure of the ITER central solenoid
/ Sgobba, Stefano (CERN) ; Lourenço, Sandra Sophie (CERN) ; Santillana, Ignacio Aviles (CERN) ; Libeyre, Paul (BIAM, St Paul lez Durance) ; Reagan, Travis (Oak Ridge, U.S. ITER) ; Wooten, Cain (Oak Ridge, U.S. ITER)
• An adapted fabrication and processing route including vacuum induction melting (VIM) and electroslag remelting (ESR) or vacuum arc remelting (VAR), combined with hot transformation steps involving where applicable redundant multidirectional forging, was successfully applied to the production of inconel 718 large size tensioning components for the precompression structure of the ITER central solenoid. • Material production involved a wide variety of gauges and product shapes, whose final properties are very consistent thanks to a repeatable and well mastered production process. [...]
2021
- Published in : Fusion Eng. Des. 170 (2021) 112543
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10.
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Design Optimization and Assessment of Fabrication of ITER Central Solenoid Twin Box Joints
/ Santillana, Ignacio Aviles (CERN) ; Guinchard, Michael (CERN) ; Lourenço, Sandra Sophie (CERN) ; Motschmann, Fritz (CERN) ; Sacristan de Frutos, Oscar (CERN) ; Sgobba, Stefano (CERN) ; Bruton, Andrew (BIAM, St Paul lez Durance) ; Gaxiola, Enrique (BIAM, St Paul lez Durance) ; Libeyre, Paul (BIAM, St Paul lez Durance) ; Schild, Thierry (BIAM, St Paul lez Durance) et al.
The ITER Central Solenoid (CS) will be one of the world's largest and most powerful pulsed superconducting electromagnet ever built; at an approximate weight of 1300 tons and a total height of 18 m consisting of a stack of six electrically independent 4.1 m diameter modules. In order to electrically connect the CS with the feeder busbars, 12 twin box joints are used to assure an efficient high current transfer while avoiding excessive AC losses. [...]
2020 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4202404
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